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WO2016112901A1 - Assembly for measuring a force or a torque, comprising a magnetic-field sensor and a magnetic-field conducting element - Google Patents

Assembly for measuring a force or a torque, comprising a magnetic-field sensor and a magnetic-field conducting element Download PDF

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Publication number
WO2016112901A1
WO2016112901A1 PCT/DE2016/200003 DE2016200003W WO2016112901A1 WO 2016112901 A1 WO2016112901 A1 WO 2016112901A1 DE 2016200003 W DE2016200003 W DE 2016200003W WO 2016112901 A1 WO2016112901 A1 WO 2016112901A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic field
magnetization
machine element
field sensors
magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE2016/200003
Other languages
German (de)
French (fr)
Inventor
Stephan Neuschaefer-Rube
Jan Matysik
Christian Mock
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of WO2016112901A1 publication Critical patent/WO2016112901A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/12—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress
    • G01L1/125—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress by using magnetostrictive means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
    • G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
    • G01L3/102—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving magnetostrictive means

Definitions

  • the present invention relates to an arrangement for measuring a force and / or moment on a machine element extending in an axis.
  • the arrangement comprises a magnetic field sensor which, together with a magnetic field guide element, faces a magnetization region on the machine element. The measurement of the force and / or the moment takes place using the inverse magnetostrictive effect.
  • EP 2 365 927 B1 shows a bottom bracket with two cranks and with a chainring carrier, which is connected to a shaft of the bottom bracket.
  • the chainring carrier is rotatably connected to a chainring shaft, which in turn is rotatably connected to the shaft.
  • the sprocket shaft has a section on a magnetization.
  • a sensor is provided which detects a change in the magnetization at a torque present in the region of the magnetization.
  • No. 6,490,934 B2 teaches a magnetoelastic torque sensor for measuring a torque which acts on an element with a ferromagnetic, magnetostrictive and magnetoelastically active region. This area is formed in a transducer, which sits as a cylindrical sleeve, for example on a shaft.
  • the torque sensor faces the transducer and preferably includes a yoke, which consists of two rectangular segments and is intended to ensure that the magnetic flux originating from the transducer is efficiently conducted into the torque sensor.
  • a torque sensor which comprises a magnetoelastic transducer.
  • the transducer sits as a cylindrical sleeve on a shaft.
  • the torque sensor preferably comprises a yoke, which consists of two rectangular segments.
  • the yoke is intended to conduct the magnetic flux to the torque sensor.
  • US 8,087,304 B2 teaches a magnetoelastic torque sensor in which the influence of an external magnetic field is to be suppressed.
  • the torque sensor comprises three individual magnetic field sensors which oppose differently oriented circulating magnetizations.
  • DE 10 2012 211 000 A1 relates to an arrangement for measuring a force and / or a moment on a machine element extending in an axis.
  • the machine element has a permanent magnetization which is aligned in the axis or radially to the axis, and whose magnetic field caused by the force and / or by the moment can be measured by a magnetic field sensor.
  • the object of the present invention is to increase the accuracy of the measurement of forces and / or moments on the basis of the inverse-magnetostrictive effect, without having to use a more complex sensor.
  • the above object is achieved by an arrangement according to the appended claim 1.
  • the arrangement according to the invention serves to measure a force and / or a moment on a machine element extending in an axis.
  • the force or the moment acts on the machine element, which leads to mechanical stresses and the machine element usually deforms slightly.
  • the axis preferably forms an axis of rotation of the machine element.
  • the machine element has at least two magnetization areas extending circumferentially about the axis for a magnetization formed in the machine element. It is thus a plurality of magnetization areas revolving around the axis, wherein the axis itself preferably does not form part of the magnetization areas.
  • the magnetization regions each have a tangential orientation with respect to a surface of the machine element extending around the axis.
  • the magnetization regions preferably each have exclusively a tangential orientation with respect to one the axis extending surface of the machine element on.
  • the magnetization regions preferably each extend along a closed path around the axis, the respective magnetization region being allowed to have short gaps.
  • the magnetization regions each form a primary sensor for determining the force or the moment.
  • the magnetization regions can also be regarded as traces of magnetization because of their circumferential formation.
  • the arrangement further comprises at least two magnetic field sensors which each form a secondary sensor for determining the force or the moment.
  • the primary sensors, d. H. the magnetization regions are used to convert the force to be measured or the moment to be measured into a corresponding magnetic field, while the secondary sensors allow the conversion of this magnetic field into electrical signals.
  • the magnetic field sensors each face one of the magnetization regions, so that they are each located at the same axial position as the associated magnetization region. Thus, the magnetic field sensors are radially offset from the magnetization regions.
  • the magnetic field sensors are each designed to measure at least one component of a magnetic field caused by the magnetization and by the force and / or by the moment.
  • the suitability of the magnetic field sensors for measuring the at least one component of the magnetic field can be formed directly or indirectly.
  • the named magnetic field occurs due to the inverse magnetostrictive effect.
  • a magnetic field conducting element is arranged in each case between two adjacent ones of the plurality of magnetic field sensors.
  • the respective magnetic field guiding element is arranged in two magnetic circuits; namely in the two magnetic circuits, which are each formed by the two adjacent ones of the plurality of magnetic field sensors with the respectively associated magnetization regions.
  • the one magnetic field guiding element or the plurality of magnetic field guiding elements respectively reduce the magnetic resistance between the magnetic field sensors and the respective associated magnetizing regions.
  • the at least one magnetic field guiding element is magnetically coupled to the two of the plurality of magnetic field sensors between which it is arranged, and preferably also mechanically connected to these.
  • the at least one magnetic field guiding element with the two of the plurality of magnetic field sensors, between which it is arranged is magnetically coupled, but mechanically firmly connected to the machine element.
  • a particular advantage of the arrangement according to the invention is that the signal-to-noise ratio of a measurement based on the inverse-magnetostrictive effect can be significantly increased by means of simple components.
  • the circumferential magnetization areas are axially to each other
  • the respectively adjacent polarities of the magnetization regions preferably have opposite polarities, so that the polarity of the magnetization changes between the magnetization regions.
  • the magnetization regions can be permanently or temporarily magnetized.
  • the magnetization regions are permanently magnetized, so that the magnetization is formed by a permanent magnetization.
  • the magnetization regions preferably consist of a magnetically hard or magnetically semi-hard material.
  • this further comprises a magnet for magnetizing the magnetization regions, so that the magnetization of the magnetization regions is basically temporary.
  • the magnet may be formed by a permanent magnet or preferably by an electromagnet.
  • the magnetization regions which are permanently or temporarily magnetized are preferably magnetically neutral in a state of the machine element which is unloaded by a force or by a moment outside the magnetization region, so that no technically relevant magnetic field outside the magnetization regions can be measured.
  • the magnetization areas preferably each represent a part of the volume of the machine element, so that they each form an integral part of the machine element.
  • the magnetization elements are preferably not applied as an additional component on the machine element, although this is fundamentally possible borrowed.
  • the magnetization regions are preferably each formed individually in an axial section of the machine element.
  • the magnetization regions are preferably each annular, wherein the axis of the machine element also forms a central axis of the respective ring shape.
  • the magnetization regions each have the shape of a hollow cylinder coaxial with the axis of the machine element.
  • the magnetic field sensors preferably have an equal distance from the axis of the machine element. In principle, the magnetic field sensors can be arranged outside the machine element or even within a cavity of the machine element, for example when the machine element is formed by a hollow shaft.
  • exactly one of the magnetic field is arranged between each two axially adjacent magnetic field sensors.
  • the adjacent magnetic field sensors are preferably adjacent to each other in the axial direction, i. H. they each have the same local component in the radial direction and in the tangential direction and differ only in their local component in the axial direction.
  • the respective magnetic field guiding element is preferably located axially between the two axially adjacent ones of the plurality of magnetic field sensors.
  • each final magnetic field guiding element is arranged axially next to those of the magnetic field sensors which are not adjacent to a further magnetic field sensor on this axial side.
  • These further final magnetic field guiding elements are preferably the same as the magnetic field guiding element or the like Magnetic magnetic elements between the magnetic field sensors magnetically coupled to the respective magnetic field sensor.
  • the axially juxtaposed arrangement of the magnetic field sensors and the at least one magnetic field guiding element can also be described by the fact that the magnetic field sensors and the at least one magnetic field guiding element form a rod-shaped arrangement in which the magnetic field sensors and the one magnetic field guiding element or the plurality of magnetic field guiding elements are arranged alternately.
  • the rod-shaped arrangement is preferably aligned parallel to the axis.
  • the rod-shaped arrangement ends at its two ends in each case with one of the further final magnetic field guiding elements.
  • a particularly preferred embodiment of the arrangement according to the invention comprises exactly two of the magnetization regions, exactly two of the magnetic field sensors, exactly one of the magnetic field guiding elements between the two magnetic field sensors and one of the further final magnetic field sensors on the axial sides of the two magnetic field sensors, to which these do not form another magnetic field sensor are adjacent.
  • a further particularly preferred embodiment of the inventive arrangement comprises exactly three of the magnetization regions, exactly three of the magnetic field sensors, exactly two of the magnetic field between the three magnetic field sensors and each of the other final magnetic field sensors on the axial sides of the two outer magnetic field sensors on which these no further Magnetic field sensor are adjacent.
  • the arrangement according to the invention can also comprise more than three of the magnetization regions and more than three of the magnetic field sensors.
  • each of the magnetization regions faces at least one of the magnetic field sensors.
  • each of the magnetization regions faces exactly one of the magnetic field sensors, so that the number of magnetization regions is equal to the number of magnetic field sensors.
  • each of the magnetization regions has an equal number of magnetic field sensors so that the number of magnetic field sensors is a whole multiple of the number of magnetization regions.
  • the one magnetic field guide element or the plurality of magnetic field guide elements are preferably each arranged in an axial section which is located axially between two adjacent ones of the magnetization regions and which is not designed for magnetization.
  • the machine element preferably has no magnetization.
  • These axial sections preferably have a same axial length.
  • the possibly existing further final magnetic field guiding elements are preferably located in axial sections in which the machine element has no magnetization.
  • the at least one magnetic field guiding element and the optionally present further closing magnetic field conducting elements can also protrude into those axial sections in which the magnetizing regions are arranged, so that magnetic field sensors designed to be axially short can be used.
  • the at least one magnetic field guide element and, if appropriate, the further terminating magnetic field guide elements preferably have a distance in the radial direction to the magnetization regions that is less than the distance in the radial direction between the magnetic field sensors and the magnetization regions.
  • the at least one magnetic field guiding element and optionally the further closing magnetic field guiding elements preferably each have a machine element boundary surface which faces the machine element or with which the respective magnetic field guiding element adjoins the machine element.
  • the machine element interface can also serve as a mounting surface for attaching the respective magnetic field guiding element on the machine element.
  • the one magnetic field guiding element or the plurality of magnetic field guiding elements preferably each have two axially lateral sensor boundary surfaces adjoining each one of the two adjacent magnetic field sensors or with which the respective magnetic field guiding element faces one of the two adjacent magnetic field sensors.
  • the possibly existing two further final magnetic field Control elements preferably each have an axially lateral sensor interface, to which the respective one of the two outer magnetic field sensors adjoins or with which the respective magnetic field guiding element faces the respective one of the two outer magnetic field sensors.
  • the sensor interfaces may also be formed within a single element, which comprises at least the respective magnetic field guiding element and a part of the respective magnetic field sensor. In this case, the sensor interfaces each represent a cross section.
  • An air gap is preferably formed between the machine element and the machine element surfaces in each case.
  • an air gap is formed in each case between the magnetic field sensors and the sensor boundary surfaces.
  • the one or more air gaps are preferably each smaller than 5 mm and more preferably smaller than 1 mm.
  • the one or more air gaps are preferably filled with a magnetically conductive fluid.
  • the magnetically conductive fluid is preferably formed by a ferrofluid.
  • the machine element interfaces preferably run parallel to the opposite section of the machine element, so that the magnetic field guide elements conform to the surface of the machine element.
  • the machine element boundary surfaces are preferably each arcuate in order to adapt to the surface of the machine element.
  • the machine element boundary surfaces are each designed in the form of a cylinder jacket segment in order to extend parallel to the cylinder-shaped or hollow-cylindrical machine element.
  • the sensor interfaces are preferably formed in each case rectangular or elliptical. Particularly preferably, the sensor interfaces are each formed square or circular.
  • the machine element interface or the machine element interfaces are preferably each larger than the sensor interfaces.
  • the machine element boundary surface or the machine element boundary surfaces are each several times as large as the sensor boundary surfaces.
  • the machine element interface or the machine element interfaces are each at least at least five times the size of the sensor interfaces. This size configuration also makes it possible to use spatially small magnetic field sensors and to introduce the magnetic flux received by the magnetic field guide elements into the magnetic field sensors in a concentrated manner.
  • the magnetic field guiding element or the magnetic field guiding elements are preferably designed in each case as a pole shoe.
  • the function of the magnetic field guide elements designed as pole shoes is comparable to the function of a pole shoe of an electric motor.
  • the magnetic field guiding element or the magnetic field guiding elements are preferably horn-shaped.
  • the surface of the at least one magnetic field guide element extending from the machine element boundary surface to the sensor boundary surfaces has no cracks and more preferably also no corners or edges. Consequently, the surface of the at least one magnetic field guiding element extending from the machine element boundary surface to the sensor boundary surfaces can preferably be described by a continuous multi-dimensional function.
  • the magnetic field guiding element or the magnetic field guiding elements are preferably made of a soft magnetic material and are preferably ferromagnetic.
  • the magnetic field guiding element or the magnetic field guiding elements are preferably unmagnetised.
  • the magnetic field guiding element or the magnetic field guiding elements are preferably mechanically fixedly connected to the magnetic field sensors.
  • the magnetic field guiding elements can be firmly connected to the machine element.
  • the at least one magnetic field guide element is annular and extends around the cylindrical machine element around or within the cavity of the hollow cylindrical Maschinenelemen- tes.
  • the ring shape is arranged coaxially with the axis of the machine element.
  • Ring shape can be interrupted.
  • the annular shape is in each case parallel to those axial sections of the machine element which are located axially between the magnetization regions.
  • the magnetic field sensors each comprise at least one coil on a coil core, which is preferably axially aligned. Axially between the coil cores of two adjacent of the magnetic field sensors each one of the magnetic field is arranged, which mechanically connects these two coil cores. Axially between the coil cores of two adjacent magnetic field sensors is preferably arranged in each case exactly one of the magnetic field control elements.
  • the coil cores and the at least one magnetic field guide element are formed integrally in one piece, so that the coil cores and the at least one magnetic field guide element consist of a single workpiece and of the same material.
  • the magnetic field sensors comprising at least one coil are preferably fluxgate sensors or forster probes.
  • the magnetization regions preferably have a high magnetostriction. They are preferably magnetoelastic.
  • the machine element preferably has the shape of a prism or a cylinder, wherein the prism or the cylinder is arranged coaxially to the axis.
  • the prism or the cylinder is preferably straight.
  • the machine element has the shape of a straight circular cylinder, wherein the circular cylinder is arranged coaxially to the axis.
  • the prism or the cylinder is conical.
  • the prism or the cylinder can also be hollow.
  • the machine element is preferably formed by a shaft, by a hollow shaft, by a shift fork or by a flange. It may, for example, be a shaft in a bottom bracket or the flange of a roll stabilizer.
  • the shaft, the shift fork or the flange can be designed for loads due to different forces and torques.
  • the machine element can also be formed by completely different types of machine elements.
  • the at least two magnetic field sensors are preferably each formed by a semiconductor sensor, by a Hall sensor, by a SQUID, by a field plate, by a magnetostrictive sensor, by a coil, by a Förster probe or by a fluxgate magnetometer.
  • other types of sensors may also be used insofar as they are suitable for measuring at least one component of the magnetic field produced by the inverse-magnetostrictive effect.
  • the arrangement according to the invention is preferably designed for measuring a torque acting on the machine element, whose axis of rotation forms the axis of the machine element.
  • the arrangement according to the invention is preferably designed for measuring a transverse force acting on the machine element.
  • the force to be measured or the torque to be measured is determined by the arrangement of the magnetization regions and the magnetic field sensors, but also the different evaluation of the signals of the plurality of magnetic field sensors, for example by a sum or difference of the signals of the plurality of magnetic field sensors.
  • this comprises a plurality of groups of magnetic field sensors.
  • Each of the groups comprises at least two of the axially spaced-apart magnetic field sensors, between each of which one of the magnetic field guiding elements is arranged.
  • each of the groups has the same number of magnetic field sensors, which also equals the number of magnetization regions.
  • the groups are preferably at a same axial position and at a same radial position, but at different tangential positions, so that the groups are circumferentially distributed around the axis.
  • the arrangement according to the invention comprises two of the groups of magnetic field sensors which have an angle of 180 ° to one another with respect to the axis.
  • the magnetic field sensors are preferably arranged on a circuit board on which they are mechanically fastened and electrically connected.
  • the board carries preferably also the magnetic field guiding elements.
  • the board is preferred by
  • Said axial direction, said tangential direction and said radial direction basically relate to the axis of the machine element.
  • Fig. 1 shows a first preferred embodiment of an inventive
  • Fig. 2 shows a second preferred embodiment of the invention
  • Fig. 3 shows a third preferred embodiment of the invention
  • FIG. 4 shows the embodiment shown in Figure 3 in a side view.
  • Fig. 5 is a detail of the embodiment shown in Fig. 3;
  • Fig. 6 shows a fourth preferred embodiment of the invention
  • FIG. 7 shows a magnetic field guide element with a square sensor interface in a detail view
  • FIG. 8 shows a magnetic field guide element with a rectangular sensor interface in a detail view
  • FIG. 9 shows a magnetic field guide element with a circular sensor interface in a detail view
  • 10 shows a magnetic field guide element with two square sensor interfaces in a detail view
  • FIG. 11 shows a magnetic field guide element with two circular sensor interfaces in a detailed view.
  • FIG. 1 shows a first preferred embodiment of an inventive arrangement in a cross-sectional view passing through an axis 01 and in a section AA perpendicular to the axis 01.
  • the arrangement is used to measure a torque M t or a force, the torque M t or the force acts on a machine element in the form of a hollow cylindrical flange 02.
  • the flange 02 extends in the axis 01, so that the axis 01 also forms the axis of its hollow cylindrical shape.
  • the flange 02 is fixed to a base body 03.
  • the flange 02 has three circumferentially extending around the axis 01 around magnetization areas in the form of magnetization tracks 04, which are axially spaced from each other.
  • the three magnetization tracks 04 each have a permanent magnetization.
  • the three magnetization tracks 04 are identical and differ only in their magnetic polarity, d. H. in their sense of circulation.
  • magnetic field sensors 06 are arranged in the interior of the hollow cylindrical shape of the flange 02, which face the magnetization tracks 04.
  • the magnetic field sensors 06 are arranged in two groups 07, 08.
  • Each of the two groups 07, 08 comprises three of the magnetic field sensors 06, which are arranged axially spaced from one another on a straight line which runs parallel to the axis 01.
  • the two groups 07, 08 of the magnetic field sensors 06 are arranged symmetrically with respect to the axis 01.
  • Magnetic field guide elements 09 close magnetic circuits 11 between the magnetic fields.
  • the magnetic field elements 09 are attached to the flange 02 and magnetically coupled thereto. Between the magnetic field guide elements 09 and the magnetic field sensors 06, an air gap 12 is formed in each case.
  • the magnetic field sensors 06 are located in axial sections, in which the magnetization tracks 04 are arranged. Between the magnetization tracks 04, the flange 02 has non-magnetized regions which are located in axial sections in which the magnetic field guide elements 09 are also arranged.
  • the magnetic field guide elements 09 are shown in simplified form in FIG.
  • the magnetic field guide elements 09 preferably have a special shape, which is illustrated in FIGS. 2 to 11.
  • FIG. 2 shows a second preferred embodiment of the arrangement according to the invention in a cross-sectional view passing through the axis 01 and in a section A-A perpendicular to the axis 01. This embodiment initially resembles the embodiment shown in FIG.
  • the magnetic field 09 are formed ring-shaped, so that each of the magnetic field elements 09 magnetically connects the associated magnetic field sensors 06 both groups 07, 08 with the magnetizing tracks 04.
  • FIG. 3 shows a third preferred embodiment of the arrangement according to the invention in a cross-sectional view running through the axis 01 and in a partial plan view.
  • This embodiment is initially similar to the embodiment shown in FIG.
  • the magnetic field sensors 06 are formed in this embodiment by fluxgate sensors or by Förstersonden, each comprising a coil 13 on a spool core 14.
  • the magnetic field guide elements 09 and the coil cores 14 of the respective group 07 are formed within a single workpiece. As a result, a very low magnetic resistance between the magnetic field elements 09 and the magnetic field sensors 06 is effected.
  • Fig. 4 shows the embodiment shown in Fig. 3 in a side view. In this lateral view, a circuit board 16 is shown, which carries the magnetic field sensors 06 and the magnetic field guiding elements 09.
  • the magnetic field guide elements 09 each have a machine element boundary surface 17 with which they project beyond the flange 02. Between the machine element boundary surfaces 17 and the flange 02 one of the air gaps 12 is formed in each case.
  • the machine element boundary surfaces 17 are each formed in the shape of a cylinder jacket segment, so that they conform to the inner surface of the flange 02.
  • Fig. 5 shows a detail of the embodiment shown in Fig. 3.
  • one of the magnetic field guide elements 09 is shown, which adjoins one of those magnetic field sensors 06 which is axially adjacent only to one of the other magnetic field sensors 06.
  • 6 shows a fourth preferred embodiment of the arrangement according to the invention in a cross-sectional view. This embodiment is initially similar to the embodiment shown in FIG. In contrast to the embodiment shown in Fig.
  • the magnetic field control elements 09 are adapted to the spatially smaller magnetic field sensors 06 performed.
  • the magnetic field guiding elements 09 have one or two sensor boundary surfaces 19 with which they face the respective magnetic field sensor 06.
  • the sensor interfaces 19 are adapted to the size of the magnetic field sensors 06.
  • the magnetic field guide elements 09 are each fastened to the flange 02 via their machine element boundary surface 17.
  • the machine element boundary surfaces 17 are each larger than the sensor boundary surfaces 19.
  • the sensor boundary surfaces 19 have an axial offset relative to the machine element boundary surfaces 17, since the magnetic field sensors 06 are shorter axially than the sensor elements Magnetization tracks 04 are.
  • FIG. 7 shows the magnetic field guide element 09 of a further preferred embodiment in a detailed view.
  • This is one of the final magnetic field guide elements 09, which adjoin only one of the magnetic field sensors 06 (shown in FIG. 6).
  • the sensor interface 19 is square and many times smaller than the machine element interface 17. The magnetic flux is strongly concentrated.
  • the sensor interface 19 is arranged axially offset from the machine element interface 17, so that the magnetic field sensors 06 (shown in FIG. 6) can be significantly narrower than the magnetization tracks 04 (shown in FIG. 6).
  • the surface of the magnetic field guide element 09 is designed so that it has no cracks.
  • FIG. 8 shows the magnetic field guide element 09 of a further preferred embodiment in a detailed view.
  • This is one of the final magnetic field guide elements 09, which adjoin only one of the magnetic field sensors 06 (shown in FIG. 6).
  • the sensor interface 19 is rectangular and many times smaller than the machine element interface 17. This greatly concentrates the magnetic flux.
  • the surface of the magnetic field guide element 09 is designed so that it has no cracks.
  • 9 shows the magnetic field guide element 09 of a further preferred embodiment in a detailed view. This is one of the final magnetic field guide elements 09, which adjoin only one of the magnetic field sensors 06 (shown in FIG. 6).
  • the sensor interface 19 is circular and many times smaller than the machine element interface 17. This greatly concentrates the magnetic flux.
  • the sensor interface 19 is arranged axially offset from the machine element interface 17, so that the magnetic field sensors 06 (shown in FIG. 6) can be significantly narrower than the magnetization tracks 04 (shown in FIG. 6).
  • the surface of the magnetic field guide element 09 is designed so that it has no cracks.
  • Fig. 10 shows the magnetic field guiding element 09 of a further preferred embodiment in a detailed view.
  • This is one of the magnetic field guiding elements 09, which are each arranged axially between two adjacent ones of the magnetic field sensors 06 (shown in FIG. 6) and therefore have two of the sensor boundary surfaces 19.
  • the two sensor interfaces 19 are square and many times smaller than the machine element interface 17.
  • the sensor interfaces 19 are arranged axially offset from the machine element interface 17, so that the magnetic field sensors 06 (shown in FIG. 6) can be significantly narrower than the magnetization tracks 04 (shown in FIG. 6).
  • the surface of the magnetic field guide element 09 is designed so that it has no cracks.
  • FIG. 1 1 shows the magnetic field guide element 09 of a further preferred embodiment in a detailed view.
  • This is one of the magnetic field guide elements 09, which are each arranged axially between two adjacent magnetic field sensors 06 (shown in FIG. 6) and therefore have two of the sensor boundary surfaces 19.
  • the two sensor interfaces 19 are circular and many times smaller than the machine element interface 17.
  • the sensor interfaces 19 are arranged axially offset from the machine element interface 17, so that the magnetic field sensors 06 (shown in FIG. 6) can be significantly narrower than the magnetization tracks 04 (shown in FIG. 6).
  • the surface of the magnetic field guide element 09 is designed so that it has no cracks.

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  • General Physics & Mathematics (AREA)
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Abstract

The invention relates to an assembly for measuring a force and/or a torque on a machine element (02) extending in an axis (01). The force and/or torque is measured by using the inverse magnetostrictive effect. The machine element (02) has at least two magnetization regions (04) for magnetization, which extend circumferentially around the axis (01). The assembly also comprises at least two magnetic-field sensors (06), which are axially spaced apart from each other and each of which lies opposite one of the magnetization regions (04) and is designed to measure at least one component of a magnetic field caused by the magnetization and by the force and/or by the torque. According to the invention, a magnetic-field conducting element (09) is formed between each pair of magnetic-field sensors (06).

Description

Anordnung zur Messung einer Kraft oder eines Momentes mit einem Magnetfeldsensor und mit einem Magnetfeldleitelement  Arrangement for measuring a force or a moment with a magnetic field sensor and with a magnetic field guide element

Die vorliegende Erfindung betrifft eine Anordnung zum Messen einer Kraft und/oder eines Momentes an einem sich in einer Achse erstreckenden Maschinenelement. Die Anordnung umfasst einen Magnetfeldsensor, der gemeinsam mit einem Magnetfeldleitelement einem Magnetisierungsbereich am Maschinenelement gegenübersteht. Die Messung der Kraft und/oder des Momentes erfolgt unter Nutzung des in- vers-magnetostriktiven Effektes. The present invention relates to an arrangement for measuring a force and / or moment on a machine element extending in an axis. The arrangement comprises a magnetic field sensor which, together with a magnetic field guide element, faces a magnetization region on the machine element. The measurement of the force and / or the moment takes place using the inverse magnetostrictive effect.

Die EP 2 365 927 B1 zeigt ein Tretlager mit zwei Tretkurbeln und mit einem Kettenblattträger, der mit einer Welle des Tretlagers verbunden ist. Der Kettenblattträger ist drehfest mit einer Kettenblattwelle verbunden, die wiederum drehfest mit der Welle verbunden ist. Die Kettenblattwelle weist abschnittsweise eine Magnetisierung auf. Es ist ein Sensor vorgesehen, der eine Änderung der Magnetisierung bei einem im Bereich der Magnetisierung vorliegenden Drehmoment erfasst. EP 2 365 927 B1 shows a bottom bracket with two cranks and with a chainring carrier, which is connected to a shaft of the bottom bracket. The chainring carrier is rotatably connected to a chainring shaft, which in turn is rotatably connected to the shaft. The sprocket shaft has a section on a magnetization. A sensor is provided which detects a change in the magnetization at a torque present in the region of the magnetization.

Die US 6,490,934 B2 lehrt einen magnetoelastischen Drehmomentsensor zur Mes- sung eines Drehmomentes, welches auf ein Element mit einem ferromagnetischen, magnetostriktiven und magnetoelastisch aktiven Bereich wirkt. Dieser Bereich ist in einem Messwandler ausgebildet, der als zylindrische Hülse beispielsweise auf einer Welle sitzt. Der Drehmomentsensor steht dem Messwandler gegenüber und umfasst bevorzugt ein Joch, welches aus zwei rechtwinkligen Segmenten besteht und dafür sorgen soll, dass der vom Messwandler herrührende magnetische Fluss effizient in den Drehmomentsensor geleitet wird. No. 6,490,934 B2 teaches a magnetoelastic torque sensor for measuring a torque which acts on an element with a ferromagnetic, magnetostrictive and magnetoelastically active region. This area is formed in a transducer, which sits as a cylindrical sleeve, for example on a shaft. The torque sensor faces the transducer and preferably includes a yoke, which consists of two rectangular segments and is intended to ensure that the magnetic flux originating from the transducer is efficiently conducted into the torque sensor.

Aus der EP 0 803 053 B1 ist ein Drehmomentsensor bekannt, der einen magnetoelastischen Messwandler umfasst. Der Messwandler sitzt als zylindrische Hülse auf einer Welle. Der Drehmomentsensor umfasst bevorzugt ein Joch, welches aus zwei rechtwinkligen Segmenten besteht. Das Joch soll den magnetischen Fluss zum Drehmomentsensor leiten. Die US 8,087,304 B2 lehrt einen magnetoelastischen Drehmomentsensor, bei welchem der Einfluss eines äußeren Magnetfeldes unterdrückt werden soll. Hierfür um- fasst der Drehmomentsensor drei einzelne Magnetfeldsensoren, die unterschiedlich ausgerichteten umlaufenden Magnetisierungen gegenüberstehen. From EP 0 803 053 B1 a torque sensor is known which comprises a magnetoelastic transducer. The transducer sits as a cylindrical sleeve on a shaft. The torque sensor preferably comprises a yoke, which consists of two rectangular segments. The yoke is intended to conduct the magnetic flux to the torque sensor. US 8,087,304 B2 teaches a magnetoelastic torque sensor in which the influence of an external magnetic field is to be suppressed. For this purpose, the torque sensor comprises three individual magnetic field sensors which oppose differently oriented circulating magnetizations.

Die DE 10 2012 211 000 A1 betrifft eine Anordnung zum Messen einer Kraft und/oder eines Momentes an einem sich in einer Achse erstreckenden Maschinenelementes. Das Maschinenelement weist eine Permanentmagnetisierung auf, die in der Achse oder radial zur Achse ausgerichtet ist, und deren durch die Kraft und/oder durch das Moment bewirkte Magnetfeld von einem Magnetfeldsensor gemessen werden kann. DE 10 2012 211 000 A1 relates to an arrangement for measuring a force and / or a moment on a machine element extending in an axis. The machine element has a permanent magnetization which is aligned in the axis or radially to the axis, and whose magnetic field caused by the force and / or by the moment can be measured by a magnetic field sensor.

Die Aufgabe der vorliegenden Erfindung besteht ausgehend vom Stand der Technik darin, die Genauigkeit der Messung von Kräften und/oder Momenten auf der Basis des invers-magnetostriktiven Effektes zu erhöhen, ohne dafür einen aufwändigeren Sensor verwenden zu müssen. The object of the present invention, starting from the prior art, is to increase the accuracy of the measurement of forces and / or moments on the basis of the inverse-magnetostrictive effect, without having to use a more complex sensor.

Die genannte Aufgabe wird gelöst durch eine Anordnung gemäß dem beigefügten Anspruch 1. Die erfindungsgemäße Anordnung dient zum Messen einer Kraft und/oder eines Momentes an einem sich in einer Achse erstreckenden Maschinenelement. Die Kraft bzw. das Moment wirkt auf das Maschinenelement, wodurch es zu mechanischen Spannungen kommt und sich das Maschinenelement zumeist geringfügig verformt. Die Achse bildet bevorzugt eine Rotationsachse des Maschinenelementes. The above object is achieved by an arrangement according to the appended claim 1. The arrangement according to the invention serves to measure a force and / or a moment on a machine element extending in an axis. The force or the moment acts on the machine element, which leads to mechanical stresses and the machine element usually deforms slightly. The axis preferably forms an axis of rotation of the machine element.

Erfindungsgemäß weist das Maschinenelement mindestens zwei sich umfänglich um die Achse herum erstreckende Magnetisierungsbereiche für eine im Maschinenelement ausgebildete Magnetisierung auf. Es handelt sich somit um mehrere die Achse umlaufende Magnetisierungsbereiche, wobei die Achse selbst bevorzugt nicht einen Teil der Magnetisierungsbereiche bildet. Die Magnetisierungsbereiche weisen jeweils eine tangentiale Ausrichtung in Bezug auf eine sich um die Achse herum erstreckende Oberfläche des Maschinenelementes auf. Die Magnetisierungsbereiche weisen jeweils bevorzugt ausschließlich eine tangentiale Ausrichtung in Bezug auf eine sich um die Achse herum erstreckende Oberfläche des Maschinenelementes auf. Die Magnetisierungsbereiche erstrecken sich jeweils bevorzugt entlang eines geschlossenen Pfades um die Achse herum, wobei der jeweilige Magnetisierungsbereich kurze Lücken aufweisen darf. Die Magnetisierungsbereiche bilden jeweils einen Primärsensor zur Bestimmung der Kraft bzw. des Momentes. Die Magnetisierungsbereiche können wegen ihrer umfänglichen Ausbildung auch als Magnetisierungsspuren angesehen werden. According to the invention, the machine element has at least two magnetization areas extending circumferentially about the axis for a magnetization formed in the machine element. It is thus a plurality of magnetization areas revolving around the axis, wherein the axis itself preferably does not form part of the magnetization areas. The magnetization regions each have a tangential orientation with respect to a surface of the machine element extending around the axis. The magnetization regions preferably each have exclusively a tangential orientation with respect to one the axis extending surface of the machine element on. The magnetization regions preferably each extend along a closed path around the axis, the respective magnetization region being allowed to have short gaps. The magnetization regions each form a primary sensor for determining the force or the moment. The magnetization regions can also be regarded as traces of magnetization because of their circumferential formation.

Erfindungsgemäß umfasst die Anordnung weiterhin mindestens zwei Magnetfeldsen- soren, welche jeweils einen Sekundärsensor zur Bestimmung der Kraft bzw. des Momentes bilden. Die Primärsensoren, d. h. die Magnetisierungsbereiche dienen zur Wandlung der zu messenden Kraft bzw. des zu messenden Momentes in ein entsprechendes Magnetfeld, während die Sekundärsensoren die Wandlung dieses Magnetfeldes in elektrische Signale ermöglichen. Die Magnetfeldsensoren stehen jeweils ei- nem der Magnetisierungsbereiche gegenüber, sodass sie sich jeweils an einer gleichen axialen Position wie der zugehörige Magnetisierungsbereich befinden. Somit sind die Magnetfeldsensoren gegenüber den Magnetisierungsbereichen radial versetzt. Die Magnetfeldsensoren sind jeweils zur Messung zumindest einer Komponente eines durch die Magnetisierung sowie durch die Kraft und/oder durch das Moment bewirkten Magnetfeldes ausgebildet. Die Eignung der Magnetfeldsensoren zur Messung der mindestens einen Komponente des Magnetfeldes kann unmittelbar oder mittelbar ausgebildet sein. Das genannte Magnetfeld tritt aufgrund des in- vers-magnetostriktiven Effektes auf. Somit beruht die mit der erfindungsgemäßen Anordnung mögliche Messung auf dem invers-magnetostriktiven Effekt. According to the invention, the arrangement further comprises at least two magnetic field sensors which each form a secondary sensor for determining the force or the moment. The primary sensors, d. H. the magnetization regions are used to convert the force to be measured or the moment to be measured into a corresponding magnetic field, while the secondary sensors allow the conversion of this magnetic field into electrical signals. The magnetic field sensors each face one of the magnetization regions, so that they are each located at the same axial position as the associated magnetization region. Thus, the magnetic field sensors are radially offset from the magnetization regions. The magnetic field sensors are each designed to measure at least one component of a magnetic field caused by the magnetization and by the force and / or by the moment. The suitability of the magnetic field sensors for measuring the at least one component of the magnetic field can be formed directly or indirectly. The named magnetic field occurs due to the inverse magnetostrictive effect. Thus, the possible with the inventive arrangement measurement based on the inverse magnetostrictive effect.

Erfindungsgemäß ist zwischen zwei benachbarten der mehreren Magnetfeldsensoren jeweils ein Magnetfeldleitelement angeordnet. Das jeweilige Magnetfeldleitelement ist in zwei magnetischen Kreisen angeordnet; nämlich in den beiden magnetischen Kreisen, die jeweils durch die beiden benachbarten der mehreren Magnetfeldsensoren mit den jeweilig zugehörigen Magnetisierungsbereichen ausgebildet werden. Das eine Magnetfeldleitelement bzw. die mehreren Magnetfeldleitelemente verringern jeweils den magnetischen Widerstand zwischen den Magnetfeldsensoren und den jeweilig zugehörigen Magnetisierungsbereichen. Das mindestens eine Magnetfeldleitelement ist mit den beiden der mehreren Magnetfeldsensoren, zwischen denen es angeordnet ist, magnetisch gekoppelt und bevorzugt auch mechanisch mit diesen fest verbunden. Alternativ bevorzugt ist das mindestens eine Magnetfeldleitelement mit den beiden der mehreren Magnetfeldsensoren, zwischen denen es angeordnet ist, magnetisch ge- koppelt, aber mechanisch mit dem Maschinenelement fest verbunden. According to the invention, a magnetic field conducting element is arranged in each case between two adjacent ones of the plurality of magnetic field sensors. The respective magnetic field guiding element is arranged in two magnetic circuits; namely in the two magnetic circuits, which are each formed by the two adjacent ones of the plurality of magnetic field sensors with the respectively associated magnetization regions. The one magnetic field guiding element or the plurality of magnetic field guiding elements respectively reduce the magnetic resistance between the magnetic field sensors and the respective associated magnetizing regions. The at least one magnetic field guiding element is magnetically coupled to the two of the plurality of magnetic field sensors between which it is arranged, and preferably also mechanically connected to these. Alternatively, preferably, the at least one magnetic field guiding element with the two of the plurality of magnetic field sensors, between which it is arranged, is magnetically coupled, but mechanically firmly connected to the machine element.

Ein besonderer Vorteil der erfindungsgemäßen Anordnung besteht darin, dass das Signal-Rausch-Verhältnis einer Messung auf der Basis des invers-magnetostriktiven Effektes mithilfe von einfachen Komponenten deutlich erhöht werden kann. A particular advantage of the arrangement according to the invention is that the signal-to-noise ratio of a measurement based on the inverse-magnetostrictive effect can be significantly increased by means of simple components.

Bevorzugt sind die umlaufenden Magnetisierungsbereiche axial zueinander Preferably, the circumferential magnetization areas are axially to each other

beabstandet und nebeneinander angeordnet. Sie unterscheiden sich bevorzugt ausschließlich in ihrer Polarität, d. h. in ihrem Umlaufsinn. Bevorzugt weisen die jeweils benachbarten der Magnetisierungsbereiche entgegengesetzte Polaritäten auf, sodass die Polarität der Magnetisierung zwischen den Magnetisierungsbereichen wechselt. spaced and arranged side by side. They preferably differ only in their polarity, d. H. in their sense of circulation. The respectively adjacent polarities of the magnetization regions preferably have opposite polarities, so that the polarity of the magnetization changes between the magnetization regions.

Die Magnetisierungsbereiche können permanent oder temporär magnetisiert sein. Bei bevorzugten Ausführungsformen der erfindungsgemäßen Anordnung sind die Magnetisierungsbereiche permanent magnetisiert, sodass die Magnetisierung durch eine Permanentmagnetisierung gebildet ist. Hierfür bestehen die Magnetisierungsbereiche bevorzugt aus einem magnetisch harten oder magnetisch halbharten Werkstoff. Bei alternativ bevorzugten Ausführungsformen der erfindungsgemäßen Anordnung weist diese weiterhin einen Magneten zum Magnetisieren der Magnetisierungsbereiche auf, sodass die Magnetisierung der Magnetisierungsbereiche grundsätzlich temporär ist. Der Magnet kann durch einen Permanentmagneten oder bevorzugt durch einen Elektromagneten gebildet sein. The magnetization regions can be permanently or temporarily magnetized. In preferred embodiments of the arrangement according to the invention, the magnetization regions are permanently magnetized, so that the magnetization is formed by a permanent magnetization. For this purpose, the magnetization regions preferably consist of a magnetically hard or magnetically semi-hard material. In alternatively preferred embodiments of the arrangement according to the invention, this further comprises a magnet for magnetizing the magnetization regions, so that the magnetization of the magnetization regions is basically temporary. The magnet may be formed by a permanent magnet or preferably by an electromagnet.

Die permanent oder temporär magnetisierten Magnetisierungsbereiche sind in einem von einer Kraft bzw. von einem Moment unbelasteten Zustand des Maschinenelemen- tes nach außerhalb des Magnetisierungsbereich bevorzugt magnetisch neutral, sodass kein technisch relevantes Magnetfeld außerhalb der Magnetisierungsbereiche messbar ist. Die Magnetisierungsbereiche stellen bevorzugt jeweils einen Teil des Volumens des Maschinenelementes dar, sodass sie jeweils einen integralen Bestandteil des Maschinenelementes bilden. Somit sind die Magnetisierungselemente bevorzugt nicht als zusätzliches Bauteil auf das Maschinenelement aufgebracht, wenngleich dies grundsätz- lieh möglich ist. The magnetization regions which are permanently or temporarily magnetized are preferably magnetically neutral in a state of the machine element which is unloaded by a force or by a moment outside the magnetization region, so that no technically relevant magnetic field outside the magnetization regions can be measured. The magnetization areas preferably each represent a part of the volume of the machine element, so that they each form an integral part of the machine element. Thus, the magnetization elements are preferably not applied as an additional component on the machine element, although this is fundamentally possible borrowed.

Die Magnetisierungsbereiche sind bevorzugt jeweils einzeln in einem axialen Abschnitt des Maschinenelementes ausgebildet. Die Magnetisierungsbereiche sind bevorzugt jeweils ringförmig ausgebildet, wobei die Achse des Maschinenelementes auch eine mittlere Achse der jeweiligen Ringform bildet. Besonders bevorzugt weisen die Magnetisierungsbereiche jeweils die Form eines zur Achse des Maschinenelementes koaxialen Hohlzylinders auf. Die Magnetfeldsensoren weisen bevorzugt einen gleichen Abstand zur Achse des Maschinenelementes auf. Grundsätzlich können die Magnetfeldsensoren außerhalb des Maschinenelementes oder auch innerhalb eines Hohlraumes des Maschinenelementes angeordnet sein, beispielsweise wenn das Maschinenelement durch eine Hohlwelle gebildet ist. The magnetization regions are preferably each formed individually in an axial section of the machine element. The magnetization regions are preferably each annular, wherein the axis of the machine element also forms a central axis of the respective ring shape. Particularly preferably, the magnetization regions each have the shape of a hollow cylinder coaxial with the axis of the machine element. The magnetic field sensors preferably have an equal distance from the axis of the machine element. In principle, the magnetic field sensors can be arranged outside the machine element or even within a cavity of the machine element, for example when the machine element is formed by a hollow shaft.

Bevorzugt ist jeweils zwischen zwei axial benachbarten der Magnetfeldsensoren genau eines der Magnetfeld leitelemente angeordnet. Die benachbarten Magnetfeldsensoren sind bevorzugt in axialer Richtung zueinander benachbart, d. h. sie weisen in radialer Richtung und in tangentialer Richtung jeweils die gleiche Ortskomponente auf und unterscheiden sich ausschließlich in ihrer Ortskomponente in axialer Richtung. Das jeweilige Magnetfeldleitelement befindet sich bevorzugt axial zwischen den beiden axial benachbarten der mehreren Magnetfeldsensoren. Preferably, exactly one of the magnetic field is arranged between each two axially adjacent magnetic field sensors. The adjacent magnetic field sensors are preferably adjacent to each other in the axial direction, i. H. they each have the same local component in the radial direction and in the tangential direction and differ only in their local component in the axial direction. The respective magnetic field guiding element is preferably located axially between the two axially adjacent ones of the plurality of magnetic field sensors.

Bei bevorzugten Ausführungsformen der erfindungsgemäßen Anordnung ist auch je- weils ein weiteres abschließendes Magnetfeldleitelement axial neben denjenigen der Magnetfeldsensoren angeordnet, welche an dieser axialen Seite nicht zu einem weiteren Magnetfeldsensor benachbart sind. Diese weiteren abschließenden Magnetfeldleitelemente sind bevorzugt genauso wie das Magnetfeldleitelement bzw. wie die Magnetfeldleitelemente zwischen den Magnetfeldsensoren magnetisch an den jeweiligen Magnetfeldsensor gekoppelt. In preferred embodiments of the arrangement according to the invention, in each case another final magnetic field guiding element is arranged axially next to those of the magnetic field sensors which are not adjacent to a further magnetic field sensor on this axial side. These further final magnetic field guiding elements are preferably the same as the magnetic field guiding element or the like Magnetic magnetic elements between the magnetic field sensors magnetically coupled to the respective magnetic field sensor.

Die axial nebeneinander ausgebildete Anordnung der Magnetfeldsensoren und des mindestens einen Magnetfeldleitelementes kann auch dadurch beschrieben werden, dass die Magnetfeldsensoren und das mindestens eine Magnetfeldleitelement eine stabförmige Anordnung bilden, in welcher die Magnetfeldsensoren und das eine Magnetfeldleitelement bzw. die mehreren Magnetfeldleitelemente abwechselnd aneinandergereiht sind. Die stabförmige Anordnung ist bevorzugt parallel zur Achse ausge- richtet. Bevorzugt endet die stabförmige Anordnung an ihren beiden Enden jeweils mit einem der weiteren abschließenden Magnetfeldleitelemente. The axially juxtaposed arrangement of the magnetic field sensors and the at least one magnetic field guiding element can also be described by the fact that the magnetic field sensors and the at least one magnetic field guiding element form a rod-shaped arrangement in which the magnetic field sensors and the one magnetic field guiding element or the plurality of magnetic field guiding elements are arranged alternately. The rod-shaped arrangement is preferably aligned parallel to the axis. Preferably, the rod-shaped arrangement ends at its two ends in each case with one of the further final magnetic field guiding elements.

Eine besonders bevorzugte Ausführungsform der erfindungsgemäßen Anordnung um- fasst genau zwei der Magnetisierungsbereiche, genau zwei der Magnetfeldsensoren, genau eines der Magnetfeldleitelemente zwischen den beiden Magnetfeldsensoren und jeweils eines der weiteren abschließenden Magnetfeldsensoren an den axialen Seiten der beiden Magnetfeldsensoren, an denen diese zu keinem weiteren Magnetfeldsensor benachbart sind. Eine weitere besonders bevorzugte Ausführungsform der erfindungsgemäßen Anordnung umfasst genau drei der Magnetisierungsbereiche, genau drei der Magnetfeldsensoren, genau zwei der Magnetfeld leitelemente zwischen den drei Magnetfeldsensoren und jeweils eines der weiteren abschließenden Magnetfeldsensoren an den axialen Seiten der beiden äußeren Magnetfeldsensoren, an denen diese zu keinem weiteren Magnetfeldsensor benachbart sind. A particularly preferred embodiment of the arrangement according to the invention comprises exactly two of the magnetization regions, exactly two of the magnetic field sensors, exactly one of the magnetic field guiding elements between the two magnetic field sensors and one of the further final magnetic field sensors on the axial sides of the two magnetic field sensors, to which these do not form another magnetic field sensor are adjacent. A further particularly preferred embodiment of the inventive arrangement comprises exactly three of the magnetization regions, exactly three of the magnetic field sensors, exactly two of the magnetic field between the three magnetic field sensors and each of the other final magnetic field sensors on the axial sides of the two outer magnetic field sensors on which these no further Magnetic field sensor are adjacent.

Grundsätzlich kann die erfindungsgemäße Anordnung auch mehr als drei der Magnetisierungsbereiche und mehr als drei der Magnetfeldsensoren umfassen. Bevorzugt steht jedem der Magnetisierungsbereiche mindestens einer der Magnetfeldsensoren gegenüber. Bevorzugt steht jedem der Magnetisierungsbereiche genau einer der Magnetfeldsensoren gegenüber, sodass die Anzahl der Magnetisierungsbereiche gleich der Anzahl der Magnetfeldsensoren ist. Bei weiteren bevorzugten Ausführungsformen steht jedem der Magnetisierungsbereich eine gleiche Anzahl der Magnetfeld- sensoren gegenüber, sodass die Anzahl der Magnetfeldsensoren ein ganzes Mehrfaches der Anzahl der Magnetisierungsbereiche beträgt. In principle, the arrangement according to the invention can also comprise more than three of the magnetization regions and more than three of the magnetic field sensors. Preferably, each of the magnetization regions faces at least one of the magnetic field sensors. Preferably, each of the magnetization regions faces exactly one of the magnetic field sensors, so that the number of magnetization regions is equal to the number of magnetic field sensors. In further preferred embodiments, each of the magnetization regions has an equal number of magnetic field sensors so that the number of magnetic field sensors is a whole multiple of the number of magnetization regions.

Das eine Magnetfeldleitelement bzw. die mehreren Magnetfeldleitelemente sind be- vorzugt jeweils in einem axialen Abschnitt angeordnet, der sich axial zwischen zwei benachbarten der Magnetisierungsbereiche befindet und der nicht für eine Magnetisierung ausgebildet ist. In diesen axialen Abschnitten weist das Maschinenelement bevorzugt keine Magnetisierung auf. Diese axialen Abschnitte weisen bevorzugt eine gleiche axiale Länge auf. Auch die ggf. vorhandenen weiteren abschließenden Mag- netfeldleitelemente befinden sich bevorzugt in axialen Abschnitten, in denen das Maschinenelement keine Magnetisierung aufweist. Allerdings können das mindestens eine Magnetfeldleitelement und die ggf. vorhandenen weiteren abschließenden Magnetfeldleitelemente auch in diejenigen axialen Abschnitte hineinragen, in denen die Magnetisierungsbereiche angeordnet sind, sodass axial kurz ausgeführte Magnetfeldsen- soren verwendbar sind. The one magnetic field guide element or the plurality of magnetic field guide elements are preferably each arranged in an axial section which is located axially between two adjacent ones of the magnetization regions and which is not designed for magnetization. In these axial sections, the machine element preferably has no magnetization. These axial sections preferably have a same axial length. The possibly existing further final magnetic field guiding elements are preferably located in axial sections in which the machine element has no magnetization. However, the at least one magnetic field guiding element and the optionally present further closing magnetic field conducting elements can also protrude into those axial sections in which the magnetizing regions are arranged, so that magnetic field sensors designed to be axially short can be used.

Das mindestens eine Magnetfeldleitelement und ggf. die weiteren abschließenden Magnetfeldleitelemente weisen bevorzugt einen Abstand in radialer Richtung zu den Magnetisierungsbereichen auf, der geringer ist als der Abstand in radialer Richtung zwischen den Magnetfeldsensoren und den Magnetisierungsbereichen. The at least one magnetic field guide element and, if appropriate, the further terminating magnetic field guide elements preferably have a distance in the radial direction to the magnetization regions that is less than the distance in the radial direction between the magnetic field sensors and the magnetization regions.

Das mindestens eine Magnetfeldleitelement und ggf. die weiteren abschließenden Magnetfeldleitelemente weisen bevorzugt jeweils eine Maschinenelementgrenzfläche auf, welche dem Maschinenelement gegenübersteht bzw. mit welcher das jeweilige Magnetfeld leitelement an das Maschinenelement angrenzt. Die Maschinenelementgrenzfläche kann auch als Befestigungsfläche zum Befestigen des jeweiligen Magnetfeldleitelementes am Maschinenelement dienen. The at least one magnetic field guiding element and optionally the further closing magnetic field guiding elements preferably each have a machine element boundary surface which faces the machine element or with which the respective magnetic field guiding element adjoins the machine element. The machine element interface can also serve as a mounting surface for attaching the respective magnetic field guiding element on the machine element.

Das eine Magnetfeldleitelement bzw. die mehreren Magnetfeldleitelemente weisen bevorzugt jeweils zwei axial seitliche Sensorgrenzflächen auf, an die jeweils eines der beiden benachbarten Magnetfeldsensoren angrenzt bzw. mit denen das jeweilige Magnetfeld leitelement jeweils einem der beiden benachbarten Magnetfeldsensoren gegenübersteht. Die ggf. vorhandenen beiden weiteren abschließenden Magnetfeld- leitelemente weisen bevorzugt jeweils eine axial seitliche Sensorgrenzfläche auf, an welche der jeweilige der beiden äußeren Magnetfeldsensoren angrenzt bzw. mit welcher das jeweilige Magnetfeldleitelement dem jeweiligen der beiden äußeren Magnetfeldsensoren gegenübersteht. Die Sensorgrenzflächen können auch innerhalb eines einzigen Elementes ausgebildet sein, welches zumindest das jeweilige Magnetfeldleitelement und einen Teil des jeweiligen Magnetfeldsensors umfasst. In diesem Fall stellen die Sensorgrenzflächen jeweils einen Querschnitt dar. The one magnetic field guiding element or the plurality of magnetic field guiding elements preferably each have two axially lateral sensor boundary surfaces adjoining each one of the two adjacent magnetic field sensors or with which the respective magnetic field guiding element faces one of the two adjacent magnetic field sensors. The possibly existing two further final magnetic field Control elements preferably each have an axially lateral sensor interface, to which the respective one of the two outer magnetic field sensors adjoins or with which the respective magnetic field guiding element faces the respective one of the two outer magnetic field sensors. The sensor interfaces may also be formed within a single element, which comprises at least the respective magnetic field guiding element and a part of the respective magnetic field sensor. In this case, the sensor interfaces each represent a cross section.

Zwischen dem Maschinenelement und den Maschinenelementg renzflächen ist bevor- zugt jeweils ein Luftspalt ausgebildet. Alternativ bevorzugt ist zwischen den Magnetfeldsensoren und den Sensorgrenzflächen jeweils ein Luftspalt ausgebildet. Der eine bzw. die mehreren Luftspalte sind bevorzugt jeweils kleiner als 5 mm und besonders bevorzugt kleiner als 1 mm. Der eine bzw. die mehreren Luftspalte sind bevorzugt mit einem magnetisch leitfähigen Fluid gefüllt. Das magnetisch leitfähige Fluid ist bevor- zugt durch ein Ferrofluid gebildet. An air gap is preferably formed between the machine element and the machine element surfaces in each case. Alternatively, an air gap is formed in each case between the magnetic field sensors and the sensor boundary surfaces. The one or more air gaps are preferably each smaller than 5 mm and more preferably smaller than 1 mm. The one or more air gaps are preferably filled with a magnetically conductive fluid. The magnetically conductive fluid is preferably formed by a ferrofluid.

Die Maschinenelementgrenzflächen verlaufen bevorzugt parallel zu dem gegenüberstehenden Abschnitt des Maschinenelementes, sodass sich die Magnetfeldleitelemente an die Oberfläche des Maschinenelementes anschmiegen. Die Maschinenelement- grenzflächen sind bevorzugt jeweils bogenförmig ausgebildet, um sich an die Oberfläche des Maschinenelementes anzupassen. Besonders bevorzugt sind die Maschinenelementgrenzflächen jeweils zylindermantelsegmentförmig ausgebildet, um sich parallel zum zylinder- oder hohlzylinderförmigen Maschinenelement zu erstrecken. Die Sensorgrenzflächen sind bevorzugt jeweils rechteckförmig oder elliptisch ausgebildet. Besonders bevorzugt sind die Sensorgrenzflächen jeweils quadratisch oder kreisförmig ausgebildet. The machine element interfaces preferably run parallel to the opposite section of the machine element, so that the magnetic field guide elements conform to the surface of the machine element. The machine element boundary surfaces are preferably each arcuate in order to adapt to the surface of the machine element. Particularly preferably, the machine element boundary surfaces are each designed in the form of a cylinder jacket segment in order to extend parallel to the cylinder-shaped or hollow-cylindrical machine element. The sensor interfaces are preferably formed in each case rectangular or elliptical. Particularly preferably, the sensor interfaces are each formed square or circular.

Die Maschinenelementgrenzfläche bzw. die Maschinenelementgrenzflächen sind be- vorzugt jeweils größer als die Sensorgrenzflächen. Besonders bevorzugt ist die Maschinenelementgrenzfläche bzw. sind die Maschinenelementgrenzflächen jeweils mehrfach so groß wie die Sensorgrenzflächen. Besonders bevorzugt ist die Maschinenelementgrenzfläche bzw. sind die Maschinenelementgrenzflächen jeweils mindes- tens fünf Mal so groß wie die Sensorgrenzflächen. Diese Größengestaltung ermöglicht es, auch räumlich kleine Magnetfeldsensoren zu verwenden und den von den Magnetfeldleitelementen aufgenommenen magnetischen Fluss konzentriert in die Magnetfeldsensoren einzuleiten. The machine element interface or the machine element interfaces are preferably each larger than the sensor interfaces. Particularly preferably, the machine element boundary surface or the machine element boundary surfaces are each several times as large as the sensor boundary surfaces. Particularly preferably, the machine element interface or the machine element interfaces are each at least at least five times the size of the sensor interfaces. This size configuration also makes it possible to use spatially small magnetic field sensors and to introduce the magnetic flux received by the magnetic field guide elements into the magnetic field sensors in a concentrated manner.

Das Magnetfeldleitelement bzw. die Magnetfeldleitelemente sind bevorzugt jeweils als ein Polschuh ausgebildet. Die Funktion der als Polschuh ausgebildeten Magnetfeldleitelemente ist vergleichbar mit der Funktion eines Polschuhes eines Elektromotors. Hierfür ist das Magnetfeldleitelement bzw. sind die Magnetfeldleitelemente bevorzugt hornartig geformt. The magnetic field guiding element or the magnetic field guiding elements are preferably designed in each case as a pole shoe. The function of the magnetic field guide elements designed as pole shoes is comparable to the function of a pole shoe of an electric motor. For this purpose, the magnetic field guiding element or the magnetic field guiding elements are preferably horn-shaped.

Bevorzugt weist die sich von der Maschinenelementgrenzfläche zu den Sensorgrenzflächen erstreckende Oberfläche des mindestens einen Magnetfeldleitelementes keine Sprünge und weiter bevorzugt auch keine Ecken oder Kanten auf. Demzufolge ist die sich von der Maschinenelementgrenzfläche zu den Sensorgrenzflächen erstreckende Oberfläche des mindestens einen Magnetfeldleitelementes bevorzugt durch eine stetige mehrdimensionale Funktion beschreibbar. Preferably, the surface of the at least one magnetic field guide element extending from the machine element boundary surface to the sensor boundary surfaces has no cracks and more preferably also no corners or edges. Consequently, the surface of the at least one magnetic field guiding element extending from the machine element boundary surface to the sensor boundary surfaces can preferably be described by a continuous multi-dimensional function.

Das Magnetfeldleitelement bzw. die Magnetfeldleitelemente bestehen bevorzugt aus einem weichmagnetischen Werkstoff und sind bevorzugt ferromagnetisch. Das Magnetfeldleitelement bzw. die Magnetfeldleitelemente sind bevorzugt unmagnetisiert. The magnetic field guiding element or the magnetic field guiding elements are preferably made of a soft magnetic material and are preferably ferromagnetic. The magnetic field guiding element or the magnetic field guiding elements are preferably unmagnetised.

Das Magnetfeldleitelement bzw. die Magnetfeldleitelemente sind bevorzugt mechanisch fest mit den Magnetfeldsensoren verbunden. Alternativ können die Magnetfeld- leitelemente fest mit dem Maschinenelement verbunden sein. The magnetic field guiding element or the magnetic field guiding elements are preferably mechanically fixedly connected to the magnetic field sensors. Alternatively, the magnetic field guiding elements can be firmly connected to the machine element.

Bei einer besonderen Ausführungsform ist das mindestens eine Magnetfeld leitelement ringförmig ausgebildet und erstreckt sich um das zylinderförmige Maschinenelement herum bzw. innerhalb des Hohlraumes des hohlzylinderförmigen Maschinenelemen- tes. Die Ringform ist koaxial zur Achse des Maschinenelementes angeordnet. DieIn a particular embodiment, the at least one magnetic field guide element is annular and extends around the cylindrical machine element around or within the cavity of the hollow cylindrical Maschinenelemen- tes. The ring shape is arranged coaxially with the axis of the machine element. The

Ringform kann unterbrochen sein. Bevorzugt verläuft die Ringform jeweils parallel zu denjenigen axialen Abschnitten des Maschinenelementes, die sich axial zwischen den Magnetisierungsbereichen befinden. Bei besonders bevorzugten Ausführungsformen der erfindungsgemäßen Anordnung umfassen die Magnetfeldsensoren jeweils mindestens eine Spule auf einem Spulenkern, der bevorzugt axial ausgerichtet ist. Axial zwischen den Spulenkernen zweier benachbarter der Magnetfeldsensoren ist jeweils eines der Magnetfeldleitelemente angeordnet, welches diese beiden Spulenkerne mechanisch verbindet. Axial zwischen den Spulenkernen zweier benachbarter der Magnetfeldsensoren ist bevorzugt jeweils genau eines der Magnetfeld leitelemente angeordnet. Besonders bevorzugt sind die Spulenkerne und das mindestens eine Magnetfeldleitelement gemeinsam einstückig ausgebildet, sodass die die Spulenkerne und das mindestens eine Magnetfeldleitelement aus einem einzigen Werkstück und aus demselben Werkstoff bestehen. Bei den mindestens eine Spule umfassenden Magnetfeldsensoren handelt es sich bevorzugt um Fluxgate-Sensoren oder um Förstersonden. Die Magnetisierungsbereiche weisen bevorzugt eine hohe Magnetostriktivität auf. Sie sind bevorzugt magnetoelastisch ausgebildet. Ring shape can be interrupted. Preferably, the annular shape is in each case parallel to those axial sections of the machine element which are located axially between the magnetization regions. In particularly preferred embodiments of the arrangement according to the invention, the magnetic field sensors each comprise at least one coil on a coil core, which is preferably axially aligned. Axially between the coil cores of two adjacent of the magnetic field sensors each one of the magnetic field is arranged, which mechanically connects these two coil cores. Axially between the coil cores of two adjacent magnetic field sensors is preferably arranged in each case exactly one of the magnetic field control elements. Particularly preferably, the coil cores and the at least one magnetic field guide element are formed integrally in one piece, so that the coil cores and the at least one magnetic field guide element consist of a single workpiece and of the same material. The magnetic field sensors comprising at least one coil are preferably fluxgate sensors or forster probes. The magnetization regions preferably have a high magnetostriction. They are preferably magnetoelastic.

Das Maschinenelement weist bevorzugt die Form eines Prismas oder eines Zylinders auf, wobei das Prisma bzw. der Zylinder koaxial zu der Achse angeordnet ist. Das Prisma bzw. der Zylinder ist bevorzugt gerade. Besonders bevorzugt weist das Maschinenelement die Form eines geraden Kreiszylinders auf, wobei der Kreiszylinder koaxial zu der Achse angeordnet ist. Bei besonderen Ausführungsformen ist das Prisma bzw. der Zylinder konisch ausgebildet. Das Prisma bzw. der Zylinder kann auch hohl sein. The machine element preferably has the shape of a prism or a cylinder, wherein the prism or the cylinder is arranged coaxially to the axis. The prism or the cylinder is preferably straight. Particularly preferably, the machine element has the shape of a straight circular cylinder, wherein the circular cylinder is arranged coaxially to the axis. In particular embodiments, the prism or the cylinder is conical. The prism or the cylinder can also be hollow.

Das Maschinenelement ist bevorzugt durch eine Welle, durch eine Hohlwelle, durch eine Schaltgabel oder durch einen Flansch gebildet. Es kann sich beispielsweise um eine Welle in einem Tretlager oder um den Flansch eines Wankstabilisators handeln. Die Welle, die Schaltgabel bzw. der Flansch können für Belastungen durch unter- schiedliche Kräfte und Momente ausgelegt sein. Grundsätzlich kann das Maschinenelement auch durch völlig andersartige Maschinenelementtypen gebildet sein. Die mindestens zwei Magnetfeldsensoren sind bevorzugt jeweils durch einen Halbleitersensor, durch einen Hall-Sensor, durch einen SQUID, durch eine Feldplatte, durch einen magnetostriktiven Sensor, durch eine Spule, durch eine Förstersonde oder durch ein Fluxgate-Magnetometer gebildet. Grundsätzlich können auch andere Sen- sortypen verwendet werden, insofern sie zur Messung mindestens einer Komponente des durch den invers-magnetostriktiven Effekt hervorgerufenen magnetischen Feldes geeignet sind. The machine element is preferably formed by a shaft, by a hollow shaft, by a shift fork or by a flange. It may, for example, be a shaft in a bottom bracket or the flange of a roll stabilizer. The shaft, the shift fork or the flange can be designed for loads due to different forces and torques. In principle, the machine element can also be formed by completely different types of machine elements. The at least two magnetic field sensors are preferably each formed by a semiconductor sensor, by a Hall sensor, by a SQUID, by a field plate, by a magnetostrictive sensor, by a coil, by a Förster probe or by a fluxgate magnetometer. In principle, other types of sensors may also be used insofar as they are suitable for measuring at least one component of the magnetic field produced by the inverse-magnetostrictive effect.

Die erfindungsgemäße Anordnung ist bevorzugt zum Messen eines auf das Maschi- nenelement wirkenden Drehmomentes ausgebildet, dessen Drehachse die Achse des Maschinenelementes bildet. Alternativ bevorzugt ist die erfindungsgemäße Anordnung zum Messen einer auf das Maschinenelement wirkenden Querkraft ausgebildet. Die zu messende Kraft bzw. das zu messende Drehmoment wird durch die Anordnung der Magnetisierungsbereiche und der Magnetfeldsensoren, aber auch die unterschiedli- che Auswertung der Signale der mehreren Magnetfeldsensoren bestimmt, beispielsweise durch eine Summen- oder Differenzbildung der Signale der mehreren Magnetfeldsensoren. The arrangement according to the invention is preferably designed for measuring a torque acting on the machine element, whose axis of rotation forms the axis of the machine element. Alternatively, the arrangement according to the invention is preferably designed for measuring a transverse force acting on the machine element. The force to be measured or the torque to be measured is determined by the arrangement of the magnetization regions and the magnetic field sensors, but also the different evaluation of the signals of the plurality of magnetic field sensors, for example by a sum or difference of the signals of the plurality of magnetic field sensors.

Bei besonderen Ausführungsformen der erfindungsgemäßen Anordnung umfasst die- se mehrere Gruppen der Magnetfeldsensoren. Jede der Gruppen umfasst mindestens zwei der axial zueinander beabstandeten Magnetfeldsensoren, zwischen denen jeweils eines der Magnetfeldleitelemente angeordnet ist. Bevorzugt weist jede der Gruppen die gleiche Anzahl der Magnetfeldsensoren auf, die auch der Anzahl der Magnetisierungsbereiche gleicht. Die Gruppen befinden sich bevorzugt an einer glei- chen axialen Position und an einer gleichen radialen Position, jedoch an unterschiedlichen tangentialen Positionen, sodass die Gruppen umfänglich um die Achse verteilt sind. Bevorzugt umfasst die erfindungsgemäße Anordnung zwei der Gruppen der Magnetfeldsensoren, die gegenüber der Achse einen Winkel von 180° zueinander aufweisen. In particular embodiments of the arrangement according to the invention, this comprises a plurality of groups of magnetic field sensors. Each of the groups comprises at least two of the axially spaced-apart magnetic field sensors, between each of which one of the magnetic field guiding elements is arranged. Preferably, each of the groups has the same number of magnetic field sensors, which also equals the number of magnetization regions. The groups are preferably at a same axial position and at a same radial position, but at different tangential positions, so that the groups are circumferentially distributed around the axis. Preferably, the arrangement according to the invention comprises two of the groups of magnetic field sensors which have an angle of 180 ° to one another with respect to the axis.

Die Magnetfeldsensoren sind bevorzugt auf einer Platine angeordnet, auf welcher sie mechanisch befestigt und elektrisch angeschlossen sind. Die Platine trägt bevorzugt auch die Magnetfeldleitelemente. Die Platine wird bevorzugt durch The magnetic field sensors are preferably arranged on a circuit board on which they are mechanically fastened and electrically connected. The board carries preferably also the magnetic field guiding elements. The board is preferred by

Platinenhalter getragen. Board holder worn.

Die genannte axiale Richtung, die genannte tangentiale Richtung und die genannte radiale Richtung beziehen sich grundsätzlich auf die Achse des Maschinenelementes. Said axial direction, said tangential direction and said radial direction basically relate to the axis of the machine element.

Weitere Einzelheiten, Vorteile und Weiterbildungen der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsformen der Erfindung, unter Bezugnahme auf die Zeichnung. Es zeigen: Further details, advantages and developments of the invention will become apparent from the following description of preferred embodiments of the invention, with reference to the drawing. Show it:

Fig. 1 eine erste bevorzugte Ausführungsform einer erfindungsgemäßen Fig. 1 shows a first preferred embodiment of an inventive

Anordnung mit Magnetfeldleitelementen;  Arrangement with magnetic field guide elements;

Fig. 2 eine zweite bevorzugte Ausführungsform der erfindungsgemäßen Fig. 2 shows a second preferred embodiment of the invention

Anordnung mit ringförmigen Magnetfeldleitelementen;  Arrangement with annular magnetic field guide elements;

Fig. 3 eine dritte bevorzugte Ausführungsform der erfindungsgemäßen Fig. 3 shows a third preferred embodiment of the invention

Anordnung mit gemeinsam ausgebildeten Spulenkernen und  Arrangement with jointly formed coil cores and

Magnetfeldleitelementen;  Magnetfeldleitelementen;

Fig. 4 die in Fig. 3 gezeigte Ausführungsform in einer seitlichen Ansicht; 4 shows the embodiment shown in Figure 3 in a side view.

Fig. 5 ein Detail der in Fig. 3 gezeigten Ausführungsform; Fig. 5 is a detail of the embodiment shown in Fig. 3;

Fig. 6 eine vierte bevorzugte Ausführungsform der erfindungsgemäßen Fig. 6 shows a fourth preferred embodiment of the invention

Anordnung mit angepassten Magnetfeldleitelementen;  Arrangement with adapted magnetic field guide elements;

Fig. 7 ein Magnetfeldleitelement mit einer quadratischen Sensorgrenzfläche in einer Detailansicht; 7 shows a magnetic field guide element with a square sensor interface in a detail view;

Fig. 8 ein Magnetfeldleitelement mit einer rechteckförmigen Sensorgrenzfläche in einer Detailansicht; 8 shows a magnetic field guide element with a rectangular sensor interface in a detail view;

Fig. 9 ein Magnetfeldleitelement mit einer kreisförmigen Sensorgrenzfläche in einer Detailansicht; Fig. 10 ein Magnetfeldleitelement mit zwei quadratischen Sensorgrenzflächen in einer Detailansicht; und 9 shows a magnetic field guide element with a circular sensor interface in a detail view; 10 shows a magnetic field guide element with two square sensor interfaces in a detail view; and

Fig. 11 ein Magnetfeldleitelement mit zwei kreisförmigen Sensorgrenzflächen in einer Detailansicht. 11 shows a magnetic field guide element with two circular sensor interfaces in a detailed view.

Fig. 1 zeigt eine erste bevorzugte Ausführungsform einer erfindungsgemäßen Anordnung in einer durch eine Achse 01 verlaufenden Querschnittsansicht und in einem Schnitt A-A senkrecht zu der Achse 01. Die Anordnung dient zum Messen eines Drehmomentes Mt oder einer Kraft, wobei das Drehmoment Mt bzw. die Kraft auf ein Maschinenelement in Form eines hohlzylinderförmigen Flansches 02 wirkt. Der Flansch 02 erstreckt sich in der Achse 01 , sodass die Achse 01 auch die Achse seiner Hohlzylinderform bildet. Der Flansch 02 ist an einem Grund körper 03 befestigt. 1 shows a first preferred embodiment of an inventive arrangement in a cross-sectional view passing through an axis 01 and in a section AA perpendicular to the axis 01. The arrangement is used to measure a torque M t or a force, the torque M t or the force acts on a machine element in the form of a hollow cylindrical flange 02. The flange 02 extends in the axis 01, so that the axis 01 also forms the axis of its hollow cylindrical shape. The flange 02 is fixed to a base body 03.

Der Flansch 02 weist drei umfänglich um die Achse 01 herum verlaufende Magnetisierungsbereiche in Form von Magnetisierungsspuren 04 auf, die axial zueinander beabstandet sind. Die drei Magnetisierungsspuren 04 besitzen jeweils eine Permanentmagnetisierung. Die drei Magnetisierungsspuren 04 sind gleich ausgebildet und unterscheiden sich lediglich in ihrer magnetischen Polarität, d. h. in ihrem Umlaufsinn. The flange 02 has three circumferentially extending around the axis 01 around magnetization areas in the form of magnetization tracks 04, which are axially spaced from each other. The three magnetization tracks 04 each have a permanent magnetization. The three magnetization tracks 04 are identical and differ only in their magnetic polarity, d. H. in their sense of circulation.

Radial beabstandet zu den Magnetisierungsspuren 04 sind Magnetfeldsensoren 06 im Inneren der Hohlzylinderform des Flansches 02 angeordnet, welche den Magnetisierungsspuren 04 gegenüberstehen. Die Magnetfeldsensoren 06 sind in zwei Gruppen 07, 08 angeordnet. Jede der beiden Gruppen 07, 08 umfasst drei der Magnetfeldsensoren 06, die axial zueinander beabstandet auf einer Geraden angeordnet sind, welche parallel zu der Achse 01 verläuft. Die beiden Gruppen 07, 08 der Magnetfeldsensoren 06 sind bezogen auf die Achse 01 symmetrisch angeordnet. Radially spaced from the magnetization tracks 04 magnetic field sensors 06 are arranged in the interior of the hollow cylindrical shape of the flange 02, which face the magnetization tracks 04. The magnetic field sensors 06 are arranged in two groups 07, 08. Each of the two groups 07, 08 comprises three of the magnetic field sensors 06, which are arranged axially spaced from one another on a straight line which runs parallel to the axis 01. The two groups 07, 08 of the magnetic field sensors 06 are arranged symmetrically with respect to the axis 01.

Zwischen denjenigen der Magnetfeldsensoren 06, die axial benachbart sind, und an den äußeren Seiten derjenigen Magnetfeldsensoren 06, denen kein weiterer benachbarter Magnetfeldsensor folgt, ist jeweils ein Magnetfeldleitelement 09 angeordnet. Die Magnetfeldleitelemente 09 schließen magnetische Kreise 1 1 zwischen den Mag- netfeldsensoren 06 und den Magnetisierungsspuren 04. Die Magnetfeldleitelemente 09 sind am Flansch 02 befestigt und magnetisch mit diesem gekoppelt. Zwischen den Magnetfeldleitelementen 09 und den Magnetfeldsensoren 06 ist jeweils ein Luftspalt 12 ausgebildet. Between those of the magnetic field sensors 06, which are axially adjacent, and on the outer sides of those magnetic field sensors 06, which no further adjacent magnetic field sensor follows, a magnetic field guide 09 is arranged in each case. Magnetic field guide elements 09 close magnetic circuits 11 between the magnetic fields. The magnetic field elements 09 are attached to the flange 02 and magnetically coupled thereto. Between the magnetic field guide elements 09 and the magnetic field sensors 06, an air gap 12 is formed in each case.

Die Magnetfeldsensoren 06 befinden sich in axialen Abschnitten, in denen auch die Magnetisierungsspuren 04 angeordnet sind. Zwischen den Magnetisierungsspuren 04 weist der Flansch 02 nicht magnetisierte Bereiche auf, die sich in axialen Abschnitten befinden, in denen auch die Magnetfeldleitelemente 09 angeordnet sind. The magnetic field sensors 06 are located in axial sections, in which the magnetization tracks 04 are arranged. Between the magnetization tracks 04, the flange 02 has non-magnetized regions which are located in axial sections in which the magnetic field guide elements 09 are also arranged.

Die Magnetfeldleitelemente 09 sind in der Fig. 1 vereinfacht dargestellt. Die Magnetfeldleitelemente 09 weisen bevorzugt eine besondere Formgebung auf, die in Fig. 2 bis Fig. 11 veranschaulicht ist. Fig. 2 zeigt eine zweite bevorzugte Ausführungsform der erfindungsgemäßen Anordnung in einer durch die Achse 01 verlaufenden Querschnittsansicht und in einem Schnitt A-A senkrecht zu der Achse 01. Diese Ausführungsform gleicht zunächst der in Fig. 1 gezeigten Ausführungsform. Im Unterschied zu der in Fig. 1 gezeigten Ausführungsform sind die Magnetfeldleitelemente 09 ringförmig ausgebildet, sodass jedes der Magnetfeld leitelemente 09 die zugehörigen Magnetfeldsensoren 06 beider Gruppen 07, 08 mit den Magnetisierungsspuren 04 magnetisch verbindet. The magnetic field guide elements 09 are shown in simplified form in FIG. The magnetic field guide elements 09 preferably have a special shape, which is illustrated in FIGS. 2 to 11. FIG. 2 shows a second preferred embodiment of the arrangement according to the invention in a cross-sectional view passing through the axis 01 and in a section A-A perpendicular to the axis 01. This embodiment initially resembles the embodiment shown in FIG. In contrast to the embodiment shown in Fig. 1, the magnetic field 09 are formed ring-shaped, so that each of the magnetic field elements 09 magnetically connects the associated magnetic field sensors 06 both groups 07, 08 with the magnetizing tracks 04.

Fig. 3 zeigt eine dritte bevorzugte Ausführungsform der erfindungsgemäßen Anordnung in einer durch die Achse 01 verlaufenden Querschnittsansicht und in einer parti- eilen Aufsicht. Diese Ausführungsform gleicht zunächst der in Fig. 1 gezeigten Ausführungsform. Die Magnetfeldsensoren 06 sind bei dieser Ausführungsform durch Fluxgate-Sensoren bzw. durch Förstersonden gebildet, die jeweils eine Spule 13 auf einem Spulenkern 14 umfassen. Die Magnetfeldleitelemente 09 und die Spulenkerne 14 der jeweiligen Gruppe 07 sind innerhalb eines einzigen Werkstückes ausgebildet. Hierdurch wird ein sehr geringer magnetischer Widerstand zwischen den Magnetfeldleitelementen 09 und den Magnetfeld sensoren 06 bewirkt. Fig. 4 zeigt die in Fig. 3 gezeigte Ausführungsform in einer seitlichen Ansicht. In dieser seitlichen Ansicht ist eine Platine 16 dargestellt, welche die Magnetfeldsensoren 06 und die Magnetfeldleitelemente 09 trägt. Die Magnetfeldleitelemente 09 weisen jeweils eine Masch inenelementgrenzfläche 17 auf, mit welcher sie dem Flansch 02 ge- gen überstehen. Zwischen den Maschinenelementgrenzflächen 17 und dem Flansch 02 ist jeweils einer der Luftspalte 12 ausgebildet. Die Maschinenelementgrenzflächen 17 sind jeweils zylindermantelsegmentförmig ausgebildet, sodass sich diese an die innere Oberfläche des Flansches 02 anschmiegen. Fig. 5 zeigt ein Detail der in Fig. 3 gezeigten Ausführungsform. Es ist insbesondere eines der Magnetfeldleitelemente 09 dargestellt, welches an einen derjenigen Magnetfeldsensoren 06 angrenzt, welcher nur zu einem der anderen Magnetfeldsensoren 06 axial benachbart ist. Fig. 6 zeigt eine vierte bevorzugte Ausführungsform der erfindungsgemäßen Anordnung in einer Querschnittsansicht. Diese Ausführungsform gleicht zunächst der in Fig. 1 gezeigten Ausführungsform. Im Unterschied zu der in Fig. 1 gezeigten Ausführungsform sind die Magnetfeld leitelemente 09 an die räumlich kleiner ausgeführten Magnetfeldsensoren 06 angepasst. Hierfür weisen die Magnetfeldleitelemente 09 eine bzw. zwei Sensorgrenzflächen 19 auf, mit denen sie dem jeweiligen Magnetfeldsensor 06 gegenüberstehen. Die Sensorgrenzflächen 19 sind an die Größe der Magnetfeldsensoren 06 angepasst. Die Magnetfeldleitelemente 09 sind jeweils über ihre Maschi- nenelementgrenzfläche 17 am Flansch 02 befestigt Die Maschinenelementgrenzflächen 17 sind jeweils größer als die Sensorgrenzflächen 19. Zudem weisen die Sen- sorgrenzflächen 19 einen axialen Versatz gegenüber den Maschinenelementgrenzflächen 17 auf, da die Magnetfeldsensoren 06 axial kürzer als die Magnetisierungsspuren 04 sind. FIG. 3 shows a third preferred embodiment of the arrangement according to the invention in a cross-sectional view running through the axis 01 and in a partial plan view. This embodiment is initially similar to the embodiment shown in FIG. The magnetic field sensors 06 are formed in this embodiment by fluxgate sensors or by Förstersonden, each comprising a coil 13 on a spool core 14. The magnetic field guide elements 09 and the coil cores 14 of the respective group 07 are formed within a single workpiece. As a result, a very low magnetic resistance between the magnetic field elements 09 and the magnetic field sensors 06 is effected. Fig. 4 shows the embodiment shown in Fig. 3 in a side view. In this lateral view, a circuit board 16 is shown, which carries the magnetic field sensors 06 and the magnetic field guiding elements 09. The magnetic field guide elements 09 each have a machine element boundary surface 17 with which they project beyond the flange 02. Between the machine element boundary surfaces 17 and the flange 02 one of the air gaps 12 is formed in each case. The machine element boundary surfaces 17 are each formed in the shape of a cylinder jacket segment, so that they conform to the inner surface of the flange 02. Fig. 5 shows a detail of the embodiment shown in Fig. 3. In particular, one of the magnetic field guide elements 09 is shown, which adjoins one of those magnetic field sensors 06 which is axially adjacent only to one of the other magnetic field sensors 06. 6 shows a fourth preferred embodiment of the arrangement according to the invention in a cross-sectional view. This embodiment is initially similar to the embodiment shown in FIG. In contrast to the embodiment shown in Fig. 1, the magnetic field control elements 09 are adapted to the spatially smaller magnetic field sensors 06 performed. For this purpose, the magnetic field guiding elements 09 have one or two sensor boundary surfaces 19 with which they face the respective magnetic field sensor 06. The sensor interfaces 19 are adapted to the size of the magnetic field sensors 06. The magnetic field guide elements 09 are each fastened to the flange 02 via their machine element boundary surface 17. The machine element boundary surfaces 17 are each larger than the sensor boundary surfaces 19. In addition, the sensor boundary surfaces 19 have an axial offset relative to the machine element boundary surfaces 17, since the magnetic field sensors 06 are shorter axially than the sensor elements Magnetization tracks 04 are.

Fig. 7 zeigt das Magnetfeldleitelement 09 einer weiteren bevorzugten Ausführungs- form in einer Detailansicht. Dabei handelt es sich um eines der abschließenden Magnetfeldleitelemente 09, welche nur an einen der Magnetfeldsensoren 06 (gezeigt in Fig. 6) angrenzen. Bei dieser Ausführungsform ist die Sensorgrenzfläche 19 quadratisch und um ein Vielfaches kleiner als die Maschinenelementgrenzfläche 17. Hier- durch wird der magnetische Fluss stark konzentriert. Die Sensorgrenzfläche 19 ist axial versetzt zur Maschinenelementgrenzfläche 17 angeordnet, sodass die Magnetfeldsensoren 06 (gezeigt in Fig. 6) deutlich schmaler als die Magnetisierungsspuren 04 (gezeigt in Fig. 6) sein können. Die Oberfläche des Magnetfeldleitelementes 09 ist so gestaltet, dass sie keine Sprünge aufweist. 7 shows the magnetic field guide element 09 of a further preferred embodiment in a detailed view. This is one of the final magnetic field guide elements 09, which adjoin only one of the magnetic field sensors 06 (shown in FIG. 6). In this embodiment, the sensor interface 19 is square and many times smaller than the machine element interface 17. The magnetic flux is strongly concentrated. The sensor interface 19 is arranged axially offset from the machine element interface 17, so that the magnetic field sensors 06 (shown in FIG. 6) can be significantly narrower than the magnetization tracks 04 (shown in FIG. 6). The surface of the magnetic field guide element 09 is designed so that it has no cracks.

Fig. 8 zeigt das Magnetfeldleitelement 09 einer weiteren bevorzugten Ausführungsform in einer Detailansicht. Dabei handelt es sich um eines der abschließenden Magnetfeldleitelemente 09, welche nur an einen der Magnetfeldsensoren 06 (gezeigt in Fig. 6) angrenzen. Bei dieser Ausführungsform ist die Sensorgrenzfläche 19 rechteck- förmig und um ein Vielfaches kleiner als die Maschinenelementgrenzfläche 17. Hierdurch wird der magnetische Fluss stark konzentriert. Die Oberfläche des Magnetfeldleitelementes 09 ist so gestaltet, dass sie keine Sprünge aufweist. Fig. 9 zeigt das Magnetfeldleitelement 09 einer weiteren bevorzugten Ausführungsform in einer Detailansicht. Dabei handelt es sich um eines der abschließenden Magnetfeldleitelemente 09, welche nur an einen der Magnetfeldsensoren 06 (gezeigt in Fig. 6) angrenzen. Bei dieser Ausführungsform ist die Sensorgrenzfläche 19 kreisförmig und um ein Vielfaches kleiner als die Maschinenelementgrenzfläche 17. Hierdurch wird der magnetische Fluss stark konzentriert. Die Sensorgrenzfläche 19 ist axial versetzt zur Maschinenelementgrenzfläche 17 angeordnet, sodass die Magnetfeldsensoren 06 (gezeigt in Fig. 6) deutlich schmaler als die Magnetisierungsspuren 04 (gezeigt in Fig. 6) sein können. Die Oberfläche des Magnetfeld leitelementes 09 ist so gestaltet, dass sie keine Sprünge aufweist. 8 shows the magnetic field guide element 09 of a further preferred embodiment in a detailed view. This is one of the final magnetic field guide elements 09, which adjoin only one of the magnetic field sensors 06 (shown in FIG. 6). In this embodiment, the sensor interface 19 is rectangular and many times smaller than the machine element interface 17. This greatly concentrates the magnetic flux. The surface of the magnetic field guide element 09 is designed so that it has no cracks. 9 shows the magnetic field guide element 09 of a further preferred embodiment in a detailed view. This is one of the final magnetic field guide elements 09, which adjoin only one of the magnetic field sensors 06 (shown in FIG. 6). In this embodiment, the sensor interface 19 is circular and many times smaller than the machine element interface 17. This greatly concentrates the magnetic flux. The sensor interface 19 is arranged axially offset from the machine element interface 17, so that the magnetic field sensors 06 (shown in FIG. 6) can be significantly narrower than the magnetization tracks 04 (shown in FIG. 6). The surface of the magnetic field guide element 09 is designed so that it has no cracks.

Fig. 10 zeigt das Magnetfeld leitelement 09 einer weiteren bevorzugten Ausführungsform in einer Detailansicht. Dabei handelt es sich um eines der Magnetfeld leitelemen- te 09, welche jeweils axial zwischen zwei benachbarten der Magnetfeldsensoren 06 (gezeigt in Fig. 6) angeordnet sind und daher zwei der Sensorgrenzflächen 19 aufwei- sen. Bei dieser Ausführungsform sind die beiden Sensorgrenzflächen 19 quadratisch und um ein Vielfaches kleiner als die Maschinenelementgrenzfläche 17. Hierdurch wird der magnetische Fluss stark konzentriert. Die Sensorgrenzflächen 19 sind axial versetzt zur Maschinenelementgrenzfläche 17 angeordnet, sodass die Magnetfeld- sensoren 06 (gezeigt in Fig. 6) deutlich schmaler als die Magnetisierungsspuren 04 (gezeigt in Fig. 6) sein können. Die Oberfläche des Magnetfeldleitelementes 09 ist so gestaltet, dass sie keine Sprünge aufweist. Fig. 1 1 zeigt das Magnetfeldleitelement 09 einer weiteren bevorzugten Ausführungsform in einer Detailansicht. Dabei handelt es sich um eines der Magnetfeldleitelemente 09, welche jeweils axial zwischen zwei benachbarten der Magnetfeldsensoren 06 (gezeigt in Fig. 6) angeordnet sind und daher zwei der Sensorgrenzflächen 19 aufweisen. Bei dieser Ausführungsform sind die beiden Sensorgrenzflächen 19 kreisförmig und um ein Vielfaches kleiner als die Maschinenelementgrenzfläche 17. Hierdurch wird der magnetische Fluss stark konzentriert. Die Sensorgrenzflächen 19 sind axial versetzt zur Maschinenelementgrenzfläche 17 angeordnet, sodass die Magnetfeldsensoren 06 (gezeigt in Fig. 6) deutlich schmaler als die Magnetisierungsspuren 04 (gezeigt in Fig. 6) sein können. Die Oberfläche des Magnetfeldleitelementes 09 ist so gestaltet, dass sie keine Sprünge aufweist. Fig. 10 shows the magnetic field guiding element 09 of a further preferred embodiment in a detailed view. This is one of the magnetic field guiding elements 09, which are each arranged axially between two adjacent ones of the magnetic field sensors 06 (shown in FIG. 6) and therefore have two of the sensor boundary surfaces 19. In this embodiment, the two sensor interfaces 19 are square and many times smaller than the machine element interface 17. As a result, the magnetic flux is highly concentrated. The sensor interfaces 19 are arranged axially offset from the machine element interface 17, so that the magnetic field sensors 06 (shown in FIG. 6) can be significantly narrower than the magnetization tracks 04 (shown in FIG. 6). The surface of the magnetic field guide element 09 is designed so that it has no cracks. 1 1 shows the magnetic field guide element 09 of a further preferred embodiment in a detailed view. This is one of the magnetic field guide elements 09, which are each arranged axially between two adjacent magnetic field sensors 06 (shown in FIG. 6) and therefore have two of the sensor boundary surfaces 19. In this embodiment, the two sensor interfaces 19 are circular and many times smaller than the machine element interface 17. As a result, the magnetic flux is highly concentrated. The sensor interfaces 19 are arranged axially offset from the machine element interface 17, so that the magnetic field sensors 06 (shown in FIG. 6) can be significantly narrower than the magnetization tracks 04 (shown in FIG. 6). The surface of the magnetic field guide element 09 is designed so that it has no cracks.

Bezugszeichenliste LIST OF REFERENCE NUMBERS

01 Achse 01 axis

02 Maschinenelement (Flansch)  02 machine element (flange)

03 Grundkörper  03 basic body

04 Magnetisierungsspur  04 magnetization track

05 05

06 Magnetfeldsensor  06 magnetic field sensor

07 erste Gruppe  07 first group

08 zweite Gruppe  08 second group

09 Magnetfeldleitelement  09 magnetic field guide

10 10

1 1 magnetischer Kreis  1 1 magnetic circuit

12 Luftspalt  12 air gap

13 Spule  13 coil

14 Spulenkern  14 spool core

15 15

16 Platine  16 board

17 Maschinenelementgrenzfläche  17 Machine element interface

18 18

19 Sensorgrenzfläche  19 Sensor interface

Claims

Patentansprüche 1 . Anordnung zum Messen einer Kraft und/oder eines Momentes an einem sich in einer Achse (01) erstreckenden Maschinenelement (02); wobei das Maschinenelement (02) mindestens zwei sich umfänglich um die Achse (01) herum erstreckende Magnetisierungsbereiche (04) für eine Magnetisierung aufweist; wobei die Anordnung weiterhin mindestens zwei axial zueinander beabstandete Magnetfeldsensoren (06) umfasst, welche jeweils einem der Magnetisierungsbereiche (04) gegenüberstehen und jeweils zur Messung zumindest eine Komponente eines durch die Magnetisierung sowie durch die Kraft und/oder durch das Moment bewirkten Magnetfeldes ausgebildet sind; und wobei zwischen den Magnetfeldsensoren (06) jeweils ein Magnetfeldleitelement (09) ausgebildet ist. Claims 1. Arrangement for measuring a force and / or a moment on a machine element (02) extending in an axis (01); the machine element (02) having at least two magnetizing regions (04) extending around the axis (01) in a circumferential direction for magnetization; wherein the arrangement further comprises at least two axially spaced magnetic field sensors (06) each facing one of the magnetization regions (04) and each for measuring at least one component of a caused by the magnetization and by the force and / or caused by the moment magnetic field; and wherein in each case a magnetic field guide element (09) is formed between the magnetic field sensors (06). 2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass die Magnetfeldsensoren (06) jeweils mindestens eine Spule (13) auf einem Spulenkern (14) umfassen, wobei axial zwischen den Spulenkernen (14) zweier benachbarter der Magnetfeldsensoren (06) jeweils eines der Magnetfeldleitelemente (09) angeordnet ist, welches diese beiden Spulenkerne (14) mechanisch verbindet. 2. Arrangement according to claim 1, characterized in that the magnetic field sensors (06) each comprise at least one coil (13) on a coil core (14), wherein axially between the coil cores (14) of two adjacent magnetic field sensors (06) each one of the magnetic field (09) is arranged, which connects these two coil cores (14) mechanically. 3. Anordnung nach Anspruch 2, dadurch gekennzeichnet, dass die Spulenkerne (14) und das mindestens eine Magnetfeldleitelement (09) gemeinsam einstückig ausgebildet sind. 3. Arrangement according to claim 2, characterized in that the coil cores (14) and the at least one magnetic field guide element (09) are formed together in one piece. 4. Anordnung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das eine Magnetfeld leitelement (09) oder die mehreren Magnetfeldleitelemente (09) jeweils ringförmig ausgebildet und koaxial zur Achse (01) angeordnet sind. 4. Arrangement according to one of claims 1 to 3, characterized in that the magnetic field guiding element (09) or the plurality of magnetic field guiding elements (09) each annular and coaxial with the axis (01) are arranged. 5. Anordnung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die jeweils benachbarten der Magnetisierungsbereiche (04) entgegengesetzte Polaritäten aufweisen. 5. Arrangement according to one of claims 1 to 4, characterized in that the respective adjacent of the magnetization regions (04) have opposite polarities. 6. Anordnung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das eine Magnetfeldleitelement (09) oder die mehreren Magnetfeldleitelemente (09) jeweils in einem axialen Abschnitt angeordnet sind, der sich axial zwischen zwei benachbarten der Magnetisierungsbereiche (04) befindet. 6. Arrangement according to one of claims 1 to 5, characterized in that the one magnetic field guide element (09) or the plurality of magnetic field guiding elements (09) are each arranged in an axial section which is located axially between two adjacent magnetization regions (04). 7. Anordnung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das eine Magnetfeldleitelement (09) oder die mehreren Magnetfeldleitelemente (09) jeweils eine Maschinenelementgrenzfläche (17) aufweisen, welche dem Maschinenelement (02) gegenübersteht. 7. Arrangement according to one of claims 1 to 6, characterized in that the one magnetic field guide element (09) or the plurality of magnetic field guiding elements (09) each have a machine element boundary surface (17) which faces the machine element (02). 8. Anordnung nach Anspruch 7, dadurch gekennzeichnet, dass die Maschinenelementgrenzfläche (17) des einen Magnetfeld leitelementes (09) oder die Ma- schinenelementgrenzflächen (17) der mehreren Magnetfeldleitelemente (09) jeweils zylindermantelsegmentförmig sind. 8. Arrangement according to claim 7, characterized in that the machine element boundary surface (17) of the one magnetic field guiding element (09) or the machine element boundary surfaces (17) of the plurality of magnetic field guiding elements (09) are each shaped like a cylinder shell. 9. Anordnung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das eine Magnetfeldleitelement (09) oder die mehreren Magnetfeldleitelemente (09) jeweils zwei Sensorgrenzflächen (19) aufweisen, an welche jeweils eines der beiden benachbarten der mehreren Magnetfeldsensoren (06) angrenzt. 9. Arrangement according to one of claims 1 to 8, characterized in that the one magnetic field guide element (09) or the plurality of magnetic field guide elements (09) each have two sensor interfaces (19) to which in each case one of the two adjacent of the plurality of magnetic field sensors (06) adjacent , 10. Anordnung nach dem auf Anspruch 7 rückbezogenen Anspruch 9, dadurch gekennzeichnet, dass die Maschinenelementgrenzfläche (17) des einen Magnetfeldleitelementes (09) oder die Maschinenelementgrenzflächen (17) der mehreren Magnetfeld leitelemente (09) jeweils mehrfach so groß wie die Sensorgren7- flächen (19) des mindestens einen Magnetfeldleitelementes (09) sind. 10. Arrangement according to claim 7, which is dependent on claim 7, characterized in that the machine element boundary surface (17) of one magnetic field guide element (09) or the machine element boundary surfaces (17) of the plurality of magnetic field guide elements (09) are each several times as large as the sensor boundary surfaces ( 19) of the at least one magnetic field guiding element (09).
PCT/DE2016/200003 2015-01-12 2016-01-11 Assembly for measuring a force or a torque, comprising a magnetic-field sensor and a magnetic-field conducting element Ceased WO2016112901A1 (en)

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