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WO2008000012A2 - Appareil de mesure - Google Patents

Appareil de mesure Download PDF

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Publication number
WO2008000012A2
WO2008000012A2 PCT/AT2007/000321 AT2007000321W WO2008000012A2 WO 2008000012 A2 WO2008000012 A2 WO 2008000012A2 AT 2007000321 W AT2007000321 W AT 2007000321W WO 2008000012 A2 WO2008000012 A2 WO 2008000012A2
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
machine
coded
magnetized
magnetic field
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/AT2007/000321
Other languages
German (de)
English (en)
Other versions
WO2008000012A3 (fr
Inventor
Ewald Robeischl
Reinhard WÖHRNSCHIMMEL
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.)
Schneider Electric Power Drives GmbH
Original Assignee
Schneider Electric Power Drives GmbH
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 Schneider Electric Power Drives GmbH filed Critical Schneider Electric Power Drives GmbH
Publication of WO2008000012A2 publication Critical patent/WO2008000012A2/fr
Publication of WO2008000012A3 publication Critical patent/WO2008000012A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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 invention relates to a device for measuring torque, in particular torque and / or rotational speed and / or rotational angle information of a test piece or a work machine, with an electrical machine, in particular a testing machine or optionally a control machine, wherein the test specimen or the working machine with the electric machine via a shaft, optionally with the interposition of at least one coupling element is connected.
  • the pendulum machine is usually a separately excited DC machine, which is connected via a coupling with the machine to be tested. Your housing is freely suspended by two additional pedestal bearings, so that the reaction torque can be measured with a spring balance or a pressure sensor via a lever arm.
  • asynchronous machines are known as pendulum machines.
  • pendulum machines for speed measurement is known for example from AT 200 363 B1.
  • WO 2005/064 281 A1 a position sensor with a magnetic code on the object and a detector and a Position indicator described. Furthermore, the introduction of the magnetized code and the evaluation of the waveforms are shown.
  • Another torque sensor is known from WO 2005/064 301 A1. It also shows the form of introducing the current pulses on both longitudinal axes and circumferentially around a core. The sensor is for example a shaft. The current range for magnetization and the duration of the pulses and variations of the pulses are explained. The method of magnetizing is described in detail, which can be done in several steps.
  • WO 2005/064 302 A2 discloses methods and apparatus for magnetizing and calibrating sensors and the accessories.
  • a device and methods for detecting sensor events is known from WO 2005/064303 A1.
  • differential detectors for the detection of magnetic areas are described, which run longitudinally and circumferentially at different depths.
  • WO 2005/064 623 A2 discloses a method and a device for matching the magnetization of magnetized objects. It is proposed to surround magnetized areas on an object with one or more Entmagnetisierspulen.
  • EP 1 375 945 A1 discloses a torque detection arrangement or a wear detection arrangement for a friction clutch.
  • the object of the invention is to provide a device of the aforementioned type with which a highly dynamic measurement of the data is possible and which corresponds to the current requirements of the limit data from the side of the measurement accuracy.
  • the object is achieved by the invention.
  • the device according to the invention is characterized in that the shaft of the electric machine has at least one of its bearings a coded magnetized measuring range as an actuator which, preferably a magnetized magnetic field according to predetermined parameters, that in the region of this measuring range at least one sensor, preferably at least two sensors, the or the magnetic information of the magnetic field detect, is or are provided and that the or the sensors or electrically or optically, preferably serially, with a processing and
  • Processing electronics is connected or are. With the invention, it is possible for the first time to carry out the measurements of torque, in particular torque and / or rotational speed and / or rotational angle information of a test piece or a working machine economically, namely preferably with a test set-up, the mechanical values of the shaft not being in any way Be influenced.
  • the coded-magnetized measuring area is provided outside or inside the bearing of the shaft.
  • the measuring range outside of the bearing has the advantage that at any time - to make changes without intervention in the machine - the sensors can be replaced.
  • An arrangement of the measuring range within the bearing can bring constructive advantages.
  • the coded-magnetized measuring range is provided in front of one or both bearing areas of the driven-side bearing.
  • Torque and speed values are available and thus can be measured.
  • the coded-magnetized measuring range of the shaft optionally determined according to the shaft diameter, wherein in particular the layer thickness in the shaft is at least 1%, preferably 10%, of the shaft diameter. This ensures that a correspondingly strong magnetic field is generated for the measurement.
  • the magnetic coding of the measuring range takes place before the installation of the shaft. This ensures that the introduction or the application of the magnetic field is substantially simplified. Of course, it must be ensured that the further production steps are carried out during the assembly of the electric machine without loss of quality for the final measurements.
  • the length of the coded-magnetized measuring range is determined according to the shaft diameter. According to this dimensioning formula can - regardless of the shaft diameter - always find the same sensors use.
  • the length of the coded-magnetized measuring range is independent of the shaft diameter.
  • the sensor is designed as a coil arrangement and evaluates the magnetic field-dependent inductance of the shaft or of the wave range.
  • Such coil arrangements provide a highly accurate result with minimal space requirements.
  • such coil assemblies have a diameter of 3.5 mm with a length of 12 mm.
  • two coil arrangements are switched against each other, since a compensation method is used as the measuring method.
  • the senor or sensors are arranged outside or inside, on the housing and / or on the end shield of the bearing of the electric machine. As already mentioned, a rational interchangeability of the sensors is given by this.
  • the coded-magnetized measuring range of the shaft and the sensor (s) are provided in an area free of other magnetic field influences and detect or detect, in particular, only the magnetic field influences of the coded-magnetized measuring range, whereby foreign influences, such as the geomagnetic field , not recorded. This avoids extraneous influences that could influence the highly accurate measurement result. In this context may be mentioned that even the geomagnetic field must be taken into account in the measurement.
  • the electric machine is designed as a control machine and the working machine, for example, a tunnel boring drive, an extruder or a crane drive.
  • the work machine could also be an injection molding or calendering machine.
  • the electrical machine is designed as a control machine and the test specimen, for example, a
  • Fig. 1 shows an electrical machine with a coded-magnetized measuring range of the shaft and the arrangement of the sensors
  • Fig. 2 shows the magnetization curve of the measuring range in the initial state
  • Fig. 3 shows the magnetization curve with externally applied torque.
  • an electrical machine 1 is shown with its free end of the shaft 2.
  • the shaft end 2 of the shaft 3 is mounted with bearings 4 in the housing 5 and in the bearing plate.
  • the electric machine 1 serves as a testing machine, wherein the - not shown - test object or the working machine with the electric machine 1 via the shaft 3, with the interposition of at least one coupling element 6, such as a flange connected.
  • the test object or the working machine is flanged to the coupling element 6.
  • the shaft 3 of the electric machine 1 has at least one or in front of a driven-side bearing region of the bearing 4 a coded-magnetized measuring range 7 as an actuator.
  • the coded-magnetized measuring area 7 is provided outside the bearings 4.
  • the coded-magnetized measuring area 7 is a magnetized magnetic field according to specified parameters.
  • the application or introduction of the magnetic field takes place in accordance with the method indicated in the introduction in the prior art.
  • the magnetic coding of the measuring range 7 takes place before the shaft 3 is installed in the electrical machine 1.
  • the coded-magnetized measuring range 7 of the shaft 3 is determined according to the shaft diameter, wherein in particular the layer thickness in the shaft (3) is at least 1%, preferably 10%, of the shaft diameter. Furthermore, in particular, the length of the coded-magnetized measuring area 7 is determined in accordance with the shaft diameter.
  • At least one sensor 8 preferably at least two sensors, which detect the magnetic information of the magnetic field, is provided in the region of this measuring region 7.
  • the sensors 8 are preferably designed as a coil arrangement and evaluate the magnetic field-dependent inductance. Further, the or the sensors 8 are connected to a processing and processing electronics 9.
  • the coded-magnetized measuring area 7 of the shaft 3 and the sensors 8 are provided in a region free from other magnetic field influences.
  • the electrical machine 1 is designed as a control machine and the machine is for example a tunnel boring drive, an extruder or a crane drive.
  • a speed / torque controlled drive is given, which operates highly dynamically and highly accurate.
  • the electrical machine is designed as a control machine and the candidate is, for example, an internal combustion engine, a transmission, a turbine or an electric machine.
  • the method for measuring torque, in particular torque and / or rotational speed and / or rotational angle information of a test object or a work machine is briefly shown below.
  • the ferromagnetic wave 3 is magnetically coded in a region, the measuring region 7, by introducing there an axial current pulse, which results in a radially extending magnetic field. After the end of the current pulse, a radial magnetization thus remains, which closes in the interior of the shaft 3.
  • the time-varying axial current pulse is not uniformly distributed over the cross section due to eddy current effects, but it flows substantially only from the surface up to a certain penetration depth.
  • a second current pulse in opposite direction to the first and with a different time course thus also has a different penetration depth.
  • the magnetization, according to this pulse thus points in the opposite direction and is also at a different radial distance from the shaft center, as the remanence of the first current pulse.
  • two oppositely magnetized areas can be set at different depths in the shaft, which corresponds to a constellation which is usually used for a good measuring effect.
  • the effect of the inverse magnetostriction is utilized. Due to a torque occurs in the shaft material to a torsional stress. The atoms of the ferromagnetic material are small elemental magnets and firmly anchored in the crystal lattice. Due to the torsional stress acting on the crystal lattice, the
  • Fig. 2 this principle is indicated by means of a shaft 3, which has only one magnetization region, the measuring region 7, which is sufficient for the basic function. It is shown the initial state.
  • the magnetization - indicated by the arrows 10 - and the resulting magnetic flux are purely radial and close concentrically in the shaft interior.
  • Fig. 3 shows the shaft 3, which transmits a torque.
  • the larger magnetization component of course remains the radially directed one.
  • the added axial field - indicated by the arrows 11 - now runs partly over the shaft interior, where the material is not magnetically encoded, but also partially over air.
  • the external axial magnetic field can be detected by the sensors 8 mounted near the shaft surface. These sensors 8 are coils with a thin ferromagnetic core, which change their electromagnetic properties by the magnetic field of the shaft 3.
  • An evaluation or a processing and processing electronics 9 detects this behavior, which can be concluded on the torque back.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

La présente invention concerne un appareil de mesure d'informations de couple, en particulier de couple de rotation et/ou de vitesse de rotation et/ou d'angle de rotation d'un élément à tester ou d'une machine-outil. Cet appareil comprend une machine électrique (1), notamment une machine de test ou éventuellement une machine de régulation. L'élément à tester ou la machine-outil est relié à la machine électrique (1) par un arbre (3), avec au moins un élément de couplage éventuellement interposé entre eux. L'arbre (3) de la machine électrique (1) présente une région de mesure codée-aimantée (7) à proximité d'au moins un de ses paliers (4), laquelle région sert d'actionneur et se présente sous forme d'un champ magnétique qui est aimanté en fonction de paramètres définis. Au moins un capteur (8), de préférence au moins deux capteurs, se trouvent dans la zone de cette région de mesure (7), lesquels capteurs détectent les informations magnétiques du champ magnétique. Le ou les capteurs (8) sont reliés par voie électrique ou optique, de préférence en série, à une unité électronique de préparation et de traitement (9).
PCT/AT2007/000321 2006-06-30 2007-06-28 Appareil de mesure Ceased WO2008000012A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT11032006A AT504137B1 (de) 2006-06-30 2006-06-30 Einrichtung zur messung
ATA1103/2006 2006-06-30

Publications (2)

Publication Number Publication Date
WO2008000012A2 true WO2008000012A2 (fr) 2008-01-03
WO2008000012A3 WO2008000012A3 (fr) 2008-06-26

Family

ID=38845991

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2007/000321 Ceased WO2008000012A2 (fr) 2006-06-30 2007-06-28 Appareil de mesure

Country Status (2)

Country Link
AT (1) AT504137B1 (fr)
WO (1) WO2008000012A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT507621B1 (de) * 2008-12-04 2015-01-15 Sony Emcs Malaysia Sdn Bhd Störschallunterdrückende vorrichtung
WO2016162028A1 (fr) * 2015-04-07 2016-10-13 Schaeffler Technologies AG & Co. KG Dispositif et procédé de mesure sans contact d'un couple au niveau d'un élément de machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009016105B4 (de) * 2009-02-20 2017-11-16 Rolls-Royce Deutschland Ltd & Co Kg Verfahren und Vorrichtung zum Messen der Beanspruchung rotierender Wellen

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6275328A (ja) * 1985-09-30 1987-04-07 Toshiba Corp トルクセンサ
JP2545365B2 (ja) * 1986-04-21 1996-10-16 株式会社豊田中央研究所 トルク測定装置
US5269178A (en) * 1990-12-10 1993-12-14 Sensortech, L.P. Engine misfire, knock of roughness detection method and apparatus
US5440915A (en) * 1994-09-09 1995-08-15 Storar; Robert C. Method and apparatus for measuring friction torque
US7127797B1 (en) * 2000-04-20 2006-10-31 Kilmartin Brian D Imparting compressive hoop stress into a bonded magnetoelastic element by means of diameter reduction of the underlying shaft
US7124649B2 (en) * 2000-06-14 2006-10-24 Abas, Inc. Magnetic transducer torque measurement
GB0103036D0 (en) * 2001-02-07 2001-03-21 Fast Technology Ag Longitudinally-magnetised transducer
US6817253B2 (en) * 2002-03-14 2004-11-16 Sauer-Danfoss Inc. Method and means for measuring torque in hydraulic power units
DE10229084A1 (de) * 2002-06-28 2004-01-29 Zf Sachs Ag Reibungskupplung mit einer Drehmomenterfassungsanordnung und einer Verschleißerfassungsanordnung, Drehmomenterfassungsanordnung bzw. Verschleißerfassungsanordnung für eine Reibungskupplung
GB0222296D0 (en) * 2002-09-25 2002-10-30 Fast Technology Ag Torque signal transmission
WO2006013089A1 (fr) * 2004-08-02 2006-02-09 Nctengineering Gmbh Dispositif de detection pouvant identifier toutes composantes de force mecanique appliquee a un objet mobile
JP2008528986A (ja) * 2005-02-01 2008-07-31 エヌシーティーエンジニアリング ゲーエムベーハー 位置センサおよび洗濯機
DE602005014352D1 (de) * 2005-07-11 2009-06-18 Nct Engineering Gmbh Drehwinkelsensor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT507621B1 (de) * 2008-12-04 2015-01-15 Sony Emcs Malaysia Sdn Bhd Störschallunterdrückende vorrichtung
WO2016162028A1 (fr) * 2015-04-07 2016-10-13 Schaeffler Technologies AG & Co. KG Dispositif et procédé de mesure sans contact d'un couple au niveau d'un élément de machine
CN107407608A (zh) * 2015-04-07 2017-11-28 舍弗勒技术股份两合公司 用于非接触式地测量在机械部件上的力矩的装置和方法

Also Published As

Publication number Publication date
WO2008000012A3 (fr) 2008-06-26
AT504137A4 (de) 2008-03-15
AT504137B1 (de) 2008-03-15

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