[go: up one dir, main page]

WO2011060942A1 - Procédé de localisation d'un transpondeur rfid passif - Google Patents

Procédé de localisation d'un transpondeur rfid passif Download PDF

Info

Publication number
WO2011060942A1
WO2011060942A1 PCT/EP2010/007022 EP2010007022W WO2011060942A1 WO 2011060942 A1 WO2011060942 A1 WO 2011060942A1 EP 2010007022 W EP2010007022 W EP 2010007022W WO 2011060942 A1 WO2011060942 A1 WO 2011060942A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
angle
antennas
rfid transponder
determined
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/EP2010/007022
Other languages
German (de)
English (en)
Inventor
Uwe Dettmar
Rainer Kronberger
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.)
Fachhochschule Koeln
Original Assignee
Fachhochschule Koeln
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 Fachhochschule Koeln filed Critical Fachhochschule Koeln
Publication of WO2011060942A1 publication Critical patent/WO2011060942A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar
    • G01S13/878—Combination of several spaced transmitters or receivers of known location for determining the position of a transponder or a reflector

Definitions

  • the present invention relates to a method for locating a passive RFID transponder in a monitored field spanned by at least three DF antennas, to which at least one complementary antenna is assigned, the DF antennas having an opening angle range within which the DF antennas form an electromagnetic field for the activation of the antenna detectable by the complementary antenna Transmit RFID transponders, or received as a result of activation of the RFID transponder by the Komplementärantenne emitted by the RFID transponder localization signal, and wherein the position of the RFID transponder in the surveillance area is determined by bearing using the DF antennas.
  • RFID Radio Frequency Identification
  • An RFID system generally consists of a transponder which is located on or in the article and identifies it by a digital identifier contained in the transponder, as well as a reader for reading out the transponder identifier.
  • passive RFID transponders are used to identify objects usually without their own
  • the RFID transponder on a planar antenna, in which the radio field of the reader induces a voltage. Is the field strength of the electromagnetic field sufficiently high and the position of the planar antenna relative to the irradiated electromagnetic waves such that the induced voltage is sufficient to supply the RFID chip contained in the transponder, that is, the so-called activation threshold is reached, the RFID transponder sends out a signal with its identifier. Due to this behavior, a localization of the RFI D transponder is possible by bearing.
  • Bearing methods for determining the positional position of a passive RFID transponder in three-dimensional space are well known. They serve in particular the location of objects that are provided with passive RFI D transponders. According to the current state of the art, the position determination of an object usually takes place in such a way that using the fixed, omnidirectional antennas located on an RFID reader as well as from the read signals with the aid of methods for angular, transit time or signal strength measurement (RSSI) ), statistical methods and reference measurements, the position of an RFID transponder, also called RFID tag, is determined.
  • RSSI signal strength measurement
  • Transceiver is provided which with a plurality of
  • Localization antennas i. in the receiving area, one or a plurality of RFI D transponders to be located is arranged.
  • the transceiver activates and identifies the RFI D transponders and causes only the RFID transponder to be located to begin transmitting a localization signal. To determine its position by the RFID system he creates
  • Localization signal or reflects a radiated from the transmitting / receiving device carrier signal with a modulation of the carrier signal with the
  • Localization signal for example by load modulation.
  • Time-shifted replica of the radio signal of the transponder and lead them to a Lokalisationsempfnatureer for evaluation.
  • the evaluation is based on runtime differences, intensities and possibly directions of the replica of the Localization signal.
  • the location of the transponder to be located or of the object to which the transponder to be located is attached can be determined.
  • the primary variable in the evaluation is the transit time difference, which consists of the received signals of the
  • Localization antennas can be obtained.
  • the received signal intensity and direction are only included for a plausibility check.
  • the DF antennas have an opening angle range within which the DF antennas an electromagnetic field from the
  • Komplementärantenne detectable activation of the RFID transponder or a result of an activation of the RFID transponder by the
  • the position of the RFID transponder in the monitoring field is determined by bearing using the DF antennas, further wherein in each of the DF antennas, the opening angle range with a first detection angle in a first, preferably a horizontal plane pivoted over the monitoring field and a by critical angle limited
  • Angle range is determined within which the pivoting DF antenna activates the RFID transponder or a localization signal of the RFID transponder then determines the intersection of the specific angular ranges of DF antennas and its center of gravity is calculated as an estimate of the position of the RFI D transponder.
  • the basic idea of the present invention is to carry out the localization of an RFID transponder by determining the direction or the angle within which the emission of an electromagnetic field of sufficient field strength of a DF antenna can activate the RFI D transponder or out of the in / A DF antenna receives a localization signal from the RFID transponder, which may be referred to as the "Direction of Arrival” (DoA) or "Angle of Arrival” (AoA). According to the invention, this direction or
  • Angle determination also referred to as "aiming" with the aid of at least three directional position-dependent DF antennas, that is, from at least three different directions, taking into account the inaccuracy of the bearing by the detection angles of the DF antennas.
  • the at least three DF antennas have a directional characteristic for this purpose
  • a lobe characteristic so that the DF antennas a conical or viewed in a plane, a fan-shaped
  • the detection angle is much smaller than the respective pivot angle range of a DF antenna.
  • the pivoting angle range between 90 ° and 360 °, wherein a pivoting angle of 90 °, for example, in a DF antenna with réelleeckenmontage, a pivoting angle of 180 ° in an open wall mounting or a pivoting angle of 360 ° in the case of mounting in open space offers.
  • the detection angle of the antennas typically used for this application can be between 10 ° and 45 ° and is due to the width of the lobe, which essentially defines the detection angle.
  • a pivoting of the opening angle range can be done mechanically by pivoting the DF antenna or electronically by changing the directional characteristic of the antenna, as will be explained below.
  • a DF antenna can be a transmitting antenna that emits an electromagnetic field within the opening angle range, by means of which the RFID transponder can be activated, the RFID transponder emits a localization signal in its activated state, of the in this case as Reception antenna trained complementary antenna can be received.
  • the bearing of the RFI D transponder is such that the opening angle range when transmitting the electromagnetic field on the monitoring field in a first plane pivots and first that pivot angle is determined from which the RFID transponder responds, ie the Komplementärantenne Localization signal is received.
  • Pivoting angles define two of the main beam direction of the DF antenna
  • the angle range in the first plane within which the DF antenna or the other DF antennas each detect a localization signal as a consequence of the activation of the RFID transponder by the respective DF antenna, is also determined in the other, the surveillance area spanning antennas, the intersection of the particular Angular ranges A polygon whose boundaries are determined by the straight lines describing the principal ray directions present at the particular tilt angles.
  • a DF antenna may be a receive antenna that is within the aperture angle range of the RFID transponder
  • the complementary antenna in this embodiment is a transmitting antenna which emits an electromagnetic field for activating the RFID transponder.
  • the bearing of the RFID transponder is such that the respective Opening angle range of the DF antennas in a first plane pivoted on the monitoring field and first the pivot angle is determined, from which the DF antenna receives the localization signal of the RFI D transponder. This takes place when the RFI D transponder lies substantially within the opening angle range of the DF antenna. Subsequently, that pivot angle is determined, from which the DF antenna no longer receives the localization signal. This is the case when the RFI D transponder the
  • Opening angle range of the DF antenna has essentially left.
  • the two tilt angles determined by a DF antenna correspond to two directions of the main receiving direction of the DF antenna, i. that
  • the swivel angles define straight lines in the plane or planes in space that define an angular range within which the RFI D transponder is located. If the angle range is also determined one after the other in the other DF antennas spanning the monitoring field, within each of them
  • Detecting the localization signal as a result of activation of the RFI D transponder by the complementary antenna is the intersection of the particular
  • Angular ranges a polygon whose boundaries are determined by the straight lines describing the said main receiving directions present at the determined tilt angles.
  • Swing angles are checked as limit angle at each swivel angle of the angle range of the DF antenna, if a localization signal is sent from the RFID transponder, i. from the complementary antenna a localization signal
  • this swivel angle value can be stored as the first swivel angle. Furthermore, in the case of a receiving antenna as a DF antenna, it can be checked at each swivel angle whether the pivoting DF antenna receives a localization signal from the RFID transponder. If this is the case, this swivel angle value can be stored as a second swivel angle.
  • the determined pivoting angles are those angles which serve as the critical angle of the
  • Angular range can be used. On the basis of limit angle can the intersection of the angular ranges of all DF antennas determined and its center of gravity are calculated.
  • the opening angle range of a DF antenna in the first pivot plane is first pivoted in one direction and the first and second pivot angle are determined, from or to which the DF antenna a localization signal of the RFID transponder receives or the DF antenna activates this, and then pivoted back in the opposite direction and the determination of the second and the first pivot angle is repeated, wherein each of the two first pivot angles and the two second
  • Swing angles Mean values are formed and these are used as critical angle of the angular range for the Thomas Schloces. This has the advantage that the error occurring as a result of the width of the RFID transponder in the pivoting plane is compensated. Because the RFI D transponder is only then recognized by a DF antenna or activated by this, if he is essentially completely in the
  • Aperture range rests, and no longer recognized or not activated, when he has stepped out substantially completely from the opening angle range. This results in a shift of the direction of the bearing in the direction of
  • Pivoting movement which can be compensated by the re-determination of the swivel angle and subsequent averaging of the specific swivel angle values.
  • At least one complementary antenna is provided according to the invention. This is in terms of their functionality complementary to the
  • Complementary antenna is designed as a transmitting antenna and a
  • the DF antennas are designed as receiving antennas, which receive the emitted as a result of the activation of the RFID transponder localization signal, while its opening angle range is pivoted on the monitoring field.
  • the at least one complementary antenna is designed as a receiving antenna and receives a localization signal of the RFID transponder when the DF antennas are used as transmitting antennas pivotable opening angle range are formed, which activate the RFI D transponder to transmit the localization signal.
  • the at least one complementary antenna is designed as a receiving antenna and receives a localization signal of the RFID transponder when the DF antennas are used as transmitting antennas pivotable opening angle range are formed, which activate the RFI D transponder to transmit the localization signal.
  • the signal strength of the localization signal received by the latter can be determined for the pivot angles of a pivoting DF antenna and the maximum received signal strength can be determined. This has the advantage that based on the signal strength of the localization signal additional information about the position of the RFID transponder can be obtained, as will be explained below.
  • RSSI Received Signal Strength Indication
  • RSSI Received Signal Strength Indication
  • the determination of the signal strength of the localization signal can be used to that of the pivoting angle of one of the DF antennas
  • This swivel angle can be used to determine the angular range to be determined, wherein a first angle value is added to this swivel angle to form the first critical angle of the angular range and a second angle value is subtracted to form the second critical angle of the angular range.
  • the two angle values bear the width of the lobe of the lobe characteristic of
  • Angle values describe that receiving range of the DF antenna in which it has a substantially identical reception sensitivity, so that it is not possible to determine exactly in this area the direction from which a signal was received.
  • the angle values can be between 5 ° and 10 °.
  • the angle values for the calculation of the angular range are selected to be identical. Furthermore, it is advantageous to perform a plausibility check after the calculation of the angular range and / or center of gravity. If the measured
  • Pivoting angle of a DF antenna or the calculated center of gravity is not plausible, in one, several or even all DF antennas that pivot angle of the angular range determination can be used as the second highest signal strength of the localization signal was measured. This can be on n
  • the reduction of the detection angle can be achieved by reducing the transmission power of the DF antenna or by changing the directivity of the DF antenna to a narrower beam characteristic.
  • the threshold for the response is very sensitive in an RFID transponder.
  • Opening angle ranges pivoted over the entire pivoting range are opened.
  • the detection angle can be reduced in all DF antennas and the angle ranges are redetermined.
  • a DF antenna is first pivoted so far until the DF antenna activates the RFID transponder or receives a localization signal of the RFID transponder, then the
  • Detection angle decreases and the pivoting movement is continued in the same direction, in which case the first and second pivot angle are determined. This can be repeated iteratively until no more activation is effected or no localization signal is received any more. Subsequently, this iterative method can be repeated in the other DF antennas, until finally the minimum detection angle for locating the RFID transponder is set in all DF antennas.
  • the opening angle ranges of the DF antennas can be pivoted one after the other in time. This is necessary in the case of transmitting DF antennas so that the complementary antenna can correctly determine when the RFID transponder enters or leaves the angular range of a particular DF antenna in order to determine the critical angles.
  • the pivoting of the DF antennas and the determination of the angular ranges can take place simultaneously, since the DF antennas will then not interfere with each other. This has the advantage that the
  • Localization of the RFID transponder can be performed faster.
  • the detection range of DF antennas in the plane perpendicular to the first pivot plane should cover the entire space within which the RFID transponder can be located. So the recording or transmission range in a directional antenna mounted in a corner of the room relative to the plane perpendicular to the pivot plane, for example, 90 °, as is the case with a cardioid antenna. Preferred are as
  • DF antennas used directional antennas, which have a narrow conical opening area in all room dimensions, i. E. both in the first room level and with respect to a plane of space perpendicular thereto
  • Tilting plane vertical plane is tilted and the pivoting movement of the DF antenna is repeated in this tilt angle to the first pivot plane.
  • the tilt angle can be, for example, in the range between half and the full detection angle, so that the newly scanned space area itself
  • the main receiving direction of the DF antenna is in this case along the mantle of a cone whose tip is in the DF antenna.
  • This pivotal movement of the opening angle of the DF antenna on the monitoring field limited by critical angle range of the pivoting DF antenna can be determined within which the DF antenna activates the RFID transponder or receives the localization signal emitted by this. This one by the two
  • Determining the intersection of the angular ranges of DF antennas in the first pivot plane can be used. This corresponds to a projection of the angle range tilted to the first pivot plane onto the first pivot plane. From the intersection of the angular ranges of the DF antennas can then be calculated its center of gravity and thus the position of the RFID transponder position in two directions can be determined. For determining the positional position of the RFID transponder in the third
  • the opening angle range of at least one of the DF antennas in the direction of the determined center of gravity can perform a further pivoting movement in a second plane that is perpendicular to the first pivot plane, wherein the angle range is determined during the further pivoting movement within which the DF antenna activates the RFID transponder or the receives from this emitted localization signal.
  • this angular range lying in the second plane can be carried out as in the angular range lying in the first plane.
  • the swivel angle can be used, wherein during the pivoting movement in the second plane, a first pivot angle is determined, from which the RFID transponder is activated by the electromagnetic field of the pivoting DF antenna or a localization signal of the RFID transponder is received by the DF antenna, and then a second swing angle is determined up to which the RFID transponder is activated or the localization signal is received.
  • the DF antenna in the second level is first in a first
  • Pivoting pivoted determines the first and second pivot angle and then in the opposite direction of pivoting
  • Swing angles average values are formed. From the particular averaged first and the particular averaged second pivot angle can be
  • a mean angle relative to the first plane location is determined, i. an angle that is centered in the angle range. Since the position of the RFID transponder in two spatial directions by calculating the
  • Angular relationships can be determined in a right-angled triangle whose Corner points is formed by the known position of the DF antenna, the determined center of gravity and the position of the RFI D transponder.
  • the average angle of the angular range can be determined in such a way that, during the pivoting movement in the second plane relative to the pivoting angles of the DF antenna, the signal strength of the localization signal received therefrom is determined and the pivoting angle at which the signal strength is maximum is determined.
  • This pivoting angle can be used as a mean angle of the angular range in order to carry out the previously explained calculation of the positional position of the RFID transponder in the third spatial direction.
  • all DF antennas in particular one after the other, can be used in the direction of the determined
  • Pivoting movement determines each of the DF antennas that angular range within which the respective DF antenna activates the RFI D transponder or receives the localization signal emitted by this. In each case, at each of the specific angle ranges, a mean angle relative to the first
  • the position of the RFID transponder in the third spatial direction can be determined by the angular relationships in a right-angled triangle whose vertices are formed by the known position of one of the DF antennas, the determined center of gravity and the position of the RFI D transponder is. It is sufficient to use one of the DF antennas and their distance to the calculated center of gravity.
  • DF antenna received localization signal are compared with each other and the angular range of those DF antenna receiving the localization signal with the highest signal strength, for the calculation of the center of gravity of the
  • the polygon is narrower and its center of gravity moves closer to that DF antenna, which has received the localization signal with the highest signal strength.
  • the degree of reduction of the angular range may be made dependent on the received signal strength. So can the
  • DF antenna which receives a localization signal with low signal strength compared to the other DF antennas, are increased. This corresponds to a weaker mathematical weighting of the center of gravity of the polygon in the direction of this DF antenna. Enlarging the angular range widens the polygon and brings its center of gravity closer to the other DF antennas where the localization signal has a higher signal strength.
  • the opening angle ranges of the DF antennas can be pivoted by electrical adjustment of the directional characteristic of the respective DF antenna. This will be explained in more detail below.
  • a mechanical pivoting of the DF antenna can be done.
  • intersection region can be determined mathematically from the straight lines defined by the critical angles and the known DF antenna positions, which delimit the intersection region in subsections. Furthermore, it can be provided that the monitoring field is divided into a network structure, and the probability is determined that the RFID transponder is located in a specific field of the network. This can be done under
  • DF antennas can be used.
  • the monitoring field can be spanned by four, five or more DF antennas.
  • subgroups of in each case three DF antennas can be used, which are selected as a function of the RSSI values measured by them (selective combination). The estimated value for the
  • Position of the RFI D transponder by a, in particular weighted averaging of the results of the subgroups are formed.
  • An iterative and / or adaptive estimation can be done by combining subgroup results and repeated measurements.
  • Proposed method with at least three a monitoring field in which there is a passive RFI D transponder to be located spanning
  • Localization signal from at least one of the DF antennas is receivable, and for receiving a localization signal, while the RFID transponder of
  • the DF antennas is activated, wherein the opening angle range of the DF antennas is pivotable and the DF antennas and at least one
  • Complementary antennas are networked to each other via a control and evaluation unit, wherein the control and evaluation unit is adapted to determine the respective limited angle angle range of a DF antenna within which this DF antenna activates the RFID transponder or receives the localization signal emitted by this, the Cutting area of the To determine the angular ranges of the DF antennas and its center of gravity as
  • the DF antennas and the at least one complementary antenna are over
  • Complementary antenna controls, and receives and processes the antenna signals of the DF antennas and the at least one Komplementärantenne, in particular evaluates.
  • a complementary antenna may be provided at the location of each DF antenna.
  • Complementary antenna is needed. Rather, a bearing and a
  • Komplementärantenne be summarized as an RFID base station with a transmitting / receiving unit. At least three of these RFID base stations can be provided, which span the surveillance field and which are identical
  • the RFID base stations are via the control and
  • the control and evaluation unit controls the pivoting movement of the detection angle of the RFID base stations and evaluates the antenna signals of the receiving antennas.
  • the DF antennas may be formed by one- or two-dimensional antenna arrays, which are controlled in multiple channels and together form a desired directional characteristic of the overall antenna arrangement.
  • the individual antennas of the antenna array can for electronic influencing the directional characteristic, in particular for adjusting the main beam direction or main receiving direction, with signals of different phase angles and
  • Amplitudes are fed, as is known in radar systems without mechanically moving antennas or so-called phased array antennas.
  • FIG. 1 shows an RFID system with three DF antennas 3 positioned at different, known locations, which span a monitoring field.
  • Monitoring field is shown in plan view and extends in a horizontal plane.
  • a passive RFID transponder 1 to be located is arranged, which can adhere to an object, for example.
  • the DF antennas 3 are directional antennas with a lobe characteristic and have a main radiation direction 9 or main receiving direction 9 and a
  • Opening angle range 5 is always smaller than the mechanical or electronic pivoting range of the DF antennas.
  • the maximum pivoting angle range 8 of the DF antennas 3 is 90 ° for the corner antennas DF antennas 3 and 180 ° for the DF mounted on the open wall.
  • the opening angle ranges 5 of the DF antennas 3 can be pivoted within the maximum pivot angle ranges 8 by a Sehwenkwinkel 7.
  • the RFID system further comprises an omnidirectional complementary antenna 4, which is assigned to the monitoring field 2.
  • an omnidirectional complementary antenna 4 which is assigned to the monitoring field 2.
  • Transmitting antenna designed to activate the RFID transponder 1 is the
  • Complementary antenna 4 is a receiving antenna for receiving the localization signal 15 emitted by the RFID transponder 1 as a result of the activation. Conversely, if the complementary antenna 4 is implemented as a transmitting antenna for activating the RFID transponder 1, the search antennas are receiving antennas for receiving as a result of the activation of the RFID transponder 1 RFID transponder 1 emitted
  • the DF antennas 3 and the complementary antenna 4 are connected via connecting lines 13, in particular signal and control lines, to a control and evaluation unit 14.
  • the control and evaluation unit 14 controls the pivoting of the opening angle range (5) of the DF antennas (3) and detects at which pivot angle 7 a DF antenna 3 the RFID transponder 1, ie the complementary antenna 4 receives a localization signal 15, or at which swivel angle 7 a direction finding antenna 15 receives a localization signal 15 of the RFI D transponder 1.
  • the boundary regions 12 of the angular regions are each through
  • Limit angle ßi , ß 2 are defined, indicated by dashed lines.
  • a DF antenna 3 activates the RFID transponder 1 or receives a localization signal 15 thereof.
  • the detection angle 6 amount to about 20 °.
  • the angular ranges essentially correspond to the opening angle ranges 5.
  • DF antennas 3 is defined by a polygon 11, which can be determined by mathematical methods of linear programming.
  • the center of gravity of the polygon 1 is an estimate of the position of the RFI D transponder 1 im
  • FIG. 2 shows one of the DF antennas 3, which is designed as a transmitting antenna, to illustrate the method, which exploits the threshold of the RFI D transponder 1 according to the invention.
  • the opening angle range 5 starting from a pivoting angle 7 of 0 °, is first pivoted in the direction of the arrow A in the horizontal plane over the monitoring field 2, wherein the
  • Transmitting antenna emits an electromagnetic field for activating the RFI D transponder 1. From a swivel angle ⁇ the RFID transponder 1 is almost completely within the opening angle range 5, ie here the transmission range, so that it is activated and the Komplementärantenne 4 receives a localization signal.
  • This first pivot angle ⁇ - ⁇ can be used as the first limit angle ßi of the angular range to be determined. If the opening angle range 5 is further pivoted in the direction of the arrow A, the swivel angle 7 reaches a second swivel angle value a 2 from which the RFID transponder essentially no longer rests in the opening angle range 5. The complement antenna in this case no longer receives a localization signal.
  • This second pivoting angle can be used as the second critical angle for the calculation of the sectional area 0 with the other DF antennas 3.
  • the method can be repeated, in the opposite direction, see arrow B, pivoted and first the second and then the first pivot angle are determined again. An average value is then formed from the respective two pivoting angles and these average values are used as the first and second critical angle.
  • FIG. 3 shows an alternative method in which the signal strength of the localization signal 15 is taken into account for the localization of the RFID transponder 1.
  • the DF antennas 3 are designed as receiving antennas.
  • the opening angle range 5 is pivoted starting from a pivoting angle 7 of 0 ° in the horizontal plane over the monitoring field 2, wherein for each tilt angle 7 of the direction finder 3 determines the signal strength of the localization signal 15 received from this and that pivot angle 7 of the direction finder 3 is determined in which the signal strength of the localization signal 15 is maximum.
  • a first angle value ⁇ of 5 ° is subtracted to form the first critical angle ßi of the angular range and added to form the second critical angle ß 2 of the angular range, a second angle value ⁇ 2 of 5 °.
  • the angle values ⁇ - ⁇ , ⁇ depend on the width of the lobe of the directional characteristic of the direction finder antenna 3. These two limit angles ⁇ -1, ⁇ i can be used for the calculation of the intersection area 10 with the other direction finding antennas 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

La présente invention concerne un procédé de localisation d'un transpondeur RFID passif (1) dans un champ de détection (2) étendu d'au moins trois antennes radiogoniométriques (3) auquel est associé au moins une antenne complémentaire (4). Les antennes radiogoniométriques (3) comportent une zone d'angle d'ouverture (5) à l'intérieur de laquelle elles émettent un champ électromagnétique pour l'activation du transpondeur RFID (1) décelable par l'antenne complémentaire (4) ou reçoivent un signal de localisation (15) émis par le transpondeur RFID (1) à la suite d'une activation du transpondeur RFID (1) par l'antenne complémentaire (4). Il est ainsi possible de calculer la position du transpondeur RFID (1) dans le champ de détection (2) par relèvement au moyen des antennes radiogoniométriques (3), la zone d'angle d'ouverture (5) étant pour chaque antenne radiogoniométrique (3) pivotée d'un premier angle de détection (6) dans un premier plan de préférence horizontal au-dessus du champ de détection (2) et une zone angulaire rétrécie par angle limite, à l'intérieur de laquelle l'antenne radiogoniométrique (3) active le transpondeur RFID (1) ou reçoit un signal de localisation (15) du transpondeur RFID (1), étant définie. Enfin, la zone de coupure (10) des zones angulaires définies des antennes radiogoniométriques (3) est déterminée et son centre de gravité calculé comme valeur estimative de la position du transpondeur RFID (1).
PCT/EP2010/007022 2009-11-20 2010-11-19 Procédé de localisation d'un transpondeur rfid passif Ceased WO2011060942A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009053872A DE102009053872A1 (de) 2009-11-20 2009-11-20 Verfahren zur Lokalisierung eines passiven RFID-Transponders
DE102009053872.0 2009-11-20

Publications (1)

Publication Number Publication Date
WO2011060942A1 true WO2011060942A1 (fr) 2011-05-26

Family

ID=43531848

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/007022 Ceased WO2011060942A1 (fr) 2009-11-20 2010-11-19 Procédé de localisation d'un transpondeur rfid passif

Country Status (2)

Country Link
DE (1) DE102009053872A1 (fr)
WO (1) WO2011060942A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180372831A1 (en) * 2016-02-12 2018-12-27 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus and method for determining a position of a transmitter
CN115550841A (zh) * 2022-11-25 2022-12-30 深圳华云时空技术有限公司 一种基于uwb的测向定位装置和测向定位方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130154809A1 (en) * 2011-12-19 2013-06-20 Symbol Technologies, Inc. Method and apparatus for locating an item within a radio frequency identification monitored area
CN102914762B (zh) * 2012-10-26 2015-02-25 浙江大学 一种室内毫米波定位系统
DE102015015036A1 (de) 2015-11-23 2017-05-24 race result AG Positionsverfolgung bei Sportveranstaltungen
EP3415946B1 (fr) * 2017-06-13 2021-08-04 Swiss Timing Ltd. Procédé pour calculer une position d'un transpondeur dans une zone d'intérêt
DE102023115100A1 (de) 2023-06-08 2024-12-12 Deutsches Zentrum für Luft- und Raumfahrt e.V. Verfahren zur Markierung und Lokalisierung von geometrischen Referenzpunkten an Objekten und Faserverbund-Objekt

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5045860A (en) * 1990-06-27 1991-09-03 R & D Associates Method and arrangement for probabilistic determination of a target location
US20030117320A1 (en) * 2001-12-26 2003-06-26 Eung-Bae Kim Apparatus and method for tracking location of mobile station
US20040164902A1 (en) * 2003-02-24 2004-08-26 Lars Karlsson Direction finding method and system using probabilistic mapping
US20040239563A1 (en) * 2003-05-30 2004-12-02 Jocher Ronald W. Discrete radiation source location
US20080042847A1 (en) * 2006-08-14 2008-02-21 Allen Hollister Method for reading RFID tags using directional antennas
DE102006049862A1 (de) 2006-10-23 2008-04-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Konzept zur Positionsbestimmung eines passiven Transponders in einem Funksystem
WO2009007513A1 (fr) * 2007-07-11 2009-01-15 7Signal Oy Procédé permettant de surveiller et de positionner une source de signal dans un réseau radio

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080157970A1 (en) * 2006-03-23 2008-07-03 G2 Microsystems Pty. Ltd. Coarse and fine location for tagged items

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5045860A (en) * 1990-06-27 1991-09-03 R & D Associates Method and arrangement for probabilistic determination of a target location
US20030117320A1 (en) * 2001-12-26 2003-06-26 Eung-Bae Kim Apparatus and method for tracking location of mobile station
US20040164902A1 (en) * 2003-02-24 2004-08-26 Lars Karlsson Direction finding method and system using probabilistic mapping
US20040239563A1 (en) * 2003-05-30 2004-12-02 Jocher Ronald W. Discrete radiation source location
US20080042847A1 (en) * 2006-08-14 2008-02-21 Allen Hollister Method for reading RFID tags using directional antennas
DE102006049862A1 (de) 2006-10-23 2008-04-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Konzept zur Positionsbestimmung eines passiven Transponders in einem Funksystem
WO2009007513A1 (fr) * 2007-07-11 2009-01-15 7Signal Oy Procédé permettant de surveiller et de positionner une source de signal dans un réseau radio

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180372831A1 (en) * 2016-02-12 2018-12-27 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus and method for determining a position of a transmitter
US10935622B2 (en) * 2016-02-12 2021-03-02 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus and method for determining a position of a transmitter
CN115550841A (zh) * 2022-11-25 2022-12-30 深圳华云时空技术有限公司 一种基于uwb的测向定位装置和测向定位方法
CN115550841B (zh) * 2022-11-25 2023-02-24 深圳华云时空技术有限公司 一种基于uwb的测向定位方法

Also Published As

Publication number Publication date
DE102009053872A1 (de) 2011-05-26

Similar Documents

Publication Publication Date Title
WO2011060942A1 (fr) Procédé de localisation d'un transpondeur rfid passif
DE102008059424B4 (de) Sekundärradarsystem mit dynamischer Sektorisierung des zu überwachenden Raumes unter Verwendung von Multi-Antennenanordnungen und Verfahren hierzu
EP2335442B1 (fr) Dispositif et procédé d'estimation d'une orientation d'un terminal mobile
DE2911313C3 (de) Flughafen-Überwachungssystem
EP3377864B1 (fr) Dispositif d'antenne et procédé pour faire fonctionner un dispositif d'antenne
DE102014209516A1 (de) Mehrfach-Übertragungsverfahren zur Verbesserung des Betriebs von Radarsystemen im Automobilbereich
DE102011101049A1 (de) Sensor und Ausrichtungsverfahren
EP2396670A1 (fr) Procédé et système pour déterminer la distance, la vitesse et/ou la direction de déplacement d'une étiquette rfid
EP3736546B1 (fr) Appareil radar de niveau de remplissage à ajustement adaptatif de la puissance d'émission
DE19937723A1 (de) Verfahren und Vorrichtung zur Bestimmung eines Höhenwinkelfehlers eines mehrstrahligen Radar-Sensors
DE10354872A1 (de) Einrichtung zur Erfassung einer Richtung eines Ziels unter Verwendung einer Phasendifferenz von über mehrere Kanäle empfangenen Radiowellensignalen
DE112016004779T5 (de) System und Verfahren zum genauen und schnellen Bestimmen in Echtzeit von wahren Lagen von Radiofrequenz-Identifikations- (RFID-) Etiketten, die in einem überwachten Bereich mit Gegenständen assoziiert sind
EP1612578B1 (fr) Procédé de fonctionnement d'un radar
DE102010020531A1 (de) RFID-Lesevorrichtung
DE112016007196T5 (de) Strahlübertragungs-/empfangsverfahren, basisstation, endgerät und drahtloses kommunikationssystem
DE102018215359A1 (de) Radarvorrichtung für ein fahrzeug und verfahren zum schätzen eines winkels unter verwendung derselben
DE4292497C2 (de) Antennen-Kompaktmessanlage
DE102010014457A1 (de) Verfahren zur Bestimmung mindestens einer Eigenschaft eines Mediums in einem Behälter und Messeinrichtung hierzu
DE112019005500T5 (de) Antennenvorrichtung, bewegbarer körper und zielbestimmungsverfahren
WO2007090785A1 (fr) Antenne commandee electroniquement et procede correspondant pour l'application dans des systemes radio
EP3414589A1 (fr) Dispositif de détermination d'une position d'un émetteur et procédé correspondant
DE19907024A1 (de) Verfahren und Vorrichtung zur Positionsbestimmung
EP3414588A1 (fr) Dispositif et procédé de détermination de la position d'un émetteur par rapport à une zone de détection
DE4341645C2 (de) Verfahren zur Echtzeit-Messung von dynamischen dreidimensionalen Verformungen eines Meßobjektes
EP2804012B1 (fr) Procédé de mesure de la position d'une surface d'un véhicule

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10784982

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 10784982

Country of ref document: EP

Kind code of ref document: A1