EP2517146A1 - Lecteur mobile et procédé pour détecter un objet marqué par un transpondeur actif - Google Patents

Lecteur mobile et procédé pour détecter un objet marqué par un transpondeur actif

Info

Publication number
EP2517146A1
EP2517146A1 EP10790399A EP10790399A EP2517146A1 EP 2517146 A1 EP2517146 A1 EP 2517146A1 EP 10790399 A EP10790399 A EP 10790399A EP 10790399 A EP10790399 A EP 10790399A EP 2517146 A1 EP2517146 A1 EP 2517146A1
Authority
EP
European Patent Office
Prior art keywords
transponder
orientation
reading device
reader
signal
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.)
Withdrawn
Application number
EP10790399A
Other languages
German (de)
English (en)
Inventor
Andreas Bohnenberger
Daniel Evers
Martin Glänzer
Ulrike Heim
Fabian Kurz
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2517146A1 publication Critical patent/EP2517146A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
    • G06K7/10079—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions

Definitions

  • the invention relates to a mobile direction finding device for finding an object marked with an active transponder.
  • the retrieval of an object eg. In industrial
  • a corresponding RFID system typically includes at least ⁇ a transponder and a reader.
  • Transponder which can also be referred to as a "tag" is attached to an object, which, for example, stored in a warehouse and later found again. To find the object or the transponder again, the reader is used. This sends out a RF request signal which is received by the transponder is modulated and either flexed or re- actively transmitted again, wherein the modu lation ⁇ those data is carried out in accordance to be transmitted to the Le ⁇ seillion.
  • the modulation is usually selected such that it is at least suitable for unambiguously identifying the transponder. If the transponder has, for example, an additional sensor, then the modulation can also take place as a function of the measured values recorded by the sensor.
  • any data may be stored in a corresponding memory of the transponder, for example. Information about the object to which the transponder is attached. Accordingly, these data would also be included in the modulation.
  • active RFID transponders are known active method to the above purpose. Used, which does not reflect the light emitted from the Lesege ⁇ advises signal after modulation but actively transmitted. This allows a higher range to be achieved, but at the cost of a more complex design of the transponder. For example. it is not ⁇ manoeuvrable in this case to provide a power supply.
  • Batte ⁇ RIE battery power to self-powered transponders countries that relate to the energy required to run from the vicinity of the transponder.
  • Transponder marked object are in read range of the reader to be found and identified. Furthermore, there must be no interfering obstacles between the reader and transponder that shield the transponder signal.
  • the problem of complex and cost-intensive positioning infrastructure is solved in that the locating function is fully integrated into a single mobile reader, which is able to indicate the direction to the searched, marked with a transponder object without the current position of
  • Transponder and / or the reader itself must be known. A warehouse operator can thus navigate with the aid of this reader to the respective active transponder and thus to the searched object.
  • a mobile reader according to the invention has:
  • an antenna device for receiving one of
  • Transponder transmittable signal S wherein the antenna device has a main beam direction
  • the reading device has an orientation detector, with which an orientation or an orientation change of the
  • Reading device with respect to an outer space associated coordinate system K R can be determined.
  • the electronic assembly is adapted to from a signal strength of the signal received with the antenna means signal and from the same time as the signal ⁇ strength determined orientation R or change in orientation to calculate AR of the reader on the display device Anlagenzei ⁇ constricting direction to the transponder.
  • the orientation detector is in particular designed to indicate an absolute orientation R in the outer space.
  • a relative sensor system can be provided which quantitatively detects a change in the orientation of the reading device in the outer space.
  • the orientation detector is designed to indicate a relative orientation with respect to a specific starting position of the reading device, in particular a change in orientation AR relative to the starting position, in the outer space.
  • the main beam direction of the antenna device is pivotable relative to the reader.
  • the main beam direction of the antenna device is pivotable relative to the reader.
  • Antenna device itself be pivotable relative to the reader.
  • Antenna device be electronically pivotable.
  • An inventive method for determining a direction from a mobile reading device to a transponder wherein the reading device comprises an antenna device with a
  • Main beam direction comprises the following steps: the antenna device receives a signal from the transponder,
  • the main beam direction is swung while receiving bezüg ⁇ Lich an external space, at the same time the measured strength of the received signal during the pivoting, and an orientation or aforementionedsände ⁇ tion of the reader with respect to the outer space is determined,
  • the main beam direction is pivoted by
  • the reading device is moved relative to the outer space
  • the antenna device is moved relative to the reader or
  • the transponder is a passive transponder and the signal S emitted by the transponder is a first from
  • the transponder is an active transponder that actively transmits the signal.
  • an absolute orientation with respect to the outer space is determined and in addition, in particular after the direction to the transponder has been determined,
  • Changes in the orientation of the reading device detected quantitatively are used to improve the Er ⁇ result of direction determination or correct.
  • a warehouse operator can navigate through an automated bearing of an active transponder to the destination. This can be supported by a corresponding display on the reader.
  • the reader fully ⁇ constantly replaced each location infrastructure such as locating base stations or GPS satellites. Even without this infrastructure, objects can be found quickly. All, for example, objects marked by active RFID tags within reach can be used as navigation targets.
  • By using an electronic compass in the reader specified boresight is inde pendent ⁇ correct the orientation of the warehouse staff or of the reader in the room. If the warehouse operator follows the directional information of the reader, it guides him on the direct route to the destination.
  • FIG. 1 shows a bearing
  • FIG. 1 shows a bearing 1, in which a user B, for example.
  • a Lagerist with the aid of a reading device 100 scans the object 0, which is located in a shelf 10 of the bearing and is labeled with NEM ei ⁇ active transponders 200th
  • the bearing 1 is assigned a coordinate system K R.
  • the reader 100 is, or, more generally, a main beam direction ⁇ H an antenna (only indicated in Figure 1) of the reading device 100, pivoted in space.
  • a commercially available reading device 100 typically has at least the following components (see FIG. 1 ).
  • an antenna device 110 which receives the signal S emitted by the active transponder 200
  • a display device 120 on which the determined direction is displayed by the reading device 100 to the transponder 200
  • an electronic module 130 in which at least all processes for data processing, including the calculation of the direction to the transponder 200, take place using the received transponder signal S and the activation of the display device 120 and possibly the antenna device 110.
  • determining the direction from the reading device 100 to the transponder 200 a) The reading device 100 is pivoted in different directions, the transponder signal S being measured during the swiveling.
  • the term "panning" includes both a mere back-and-forth rotation about the vertical, as well as a full 360 ° rotation of the main beam direction about the vertical.
  • An evaluation of the signal strength of the empfange- NEN signal S depending on the pivoting direction results in the desired direction in which the transponder is 200, wherein the direction in which the maximum signal strength is measured ⁇ corresponds to the desired direction.
  • the antenna device 110 is a directional antenna 110 whose directional characteristic has a maximum that corresponds to a main beam direction of the antenna device 110 or the directional antenna 110.
  • the antenna 110 of the reader 100 may also be implemented as steu ⁇ newable directional antenna 110th
  • the main beam direction of such a directional antenna 110 can be made rotatable or pivotable relative to the reading device 100 in order to be able to dispense with manual pivoting of the antenna device 110 or the reading device 100.
  • Such a pivoting can be achieved by an internal mechanical pivoting device 140, with which the directional antenna 110 itself is pivoted relative to the reading device 100, and / or by an ne electrical, phase and amplitude correct control of a multi-element directional antenna 110 realize, such as in a so-called.
  • "Phased Array Antenna" The latter option can be referred to as electronic pivoting of the main beam direction.
  • Such a multi-element directional antenna 110 has at least two individual antennas (not shown). The control of the multi-element directional antenna and / or the pivot mechanism would take place via the electronics assembly 130.
  • a SAR algorithm synthetic aperture radar
  • a pan is performed while measuring the signal strength.
  • the SAR algorithm it is necessary to know very accurately the course of the panning with respect to speed and direction, i. the reader 100 must still have a corresponding sensor 150. From the data recorded in this way, the direction in which the transponder is located can be reconstructed.
  • the approaches a) and b) has in common that the antenna device 110 must be formed as a directional antenna whose main ⁇ beam direction is mechanically or electronically pivoted. At the same time, the dependence of the signal strength on the current direction is measured. In addition to the signal strength of the incident transponder signal S depending on the mo ⁇ mentanen orientation of the main direction of the beam, and a phase measurement allows conclusions as to the direction to the
  • the antenna device 110 has, for example, two (or more) individual antennas which receive the transponder signal S, then the two phases of the signals received at the individual antennas are dependent on the direction to the transponder 200:
  • the phase difference is zero if the distances of the two antennas to the transponder are the same. This applies to a uniqueness range of 2 ⁇ . If the antenna arrangement were to be rotated, the phase position would also change, the change depending on the wavelength of the signal and on the antenna arrangement. So it turns out determine the direction by comparing the phases at the individual antennas.
  • the phase measurement method can be combined with the Mes ⁇ solution of signal strength to increase the accuracy of the direction determination.
  • approach c) in contrast to a) and b) does not require Richtan ⁇ antenna, that is, the antenna device 110 is here WE niger consuming. In return, in the approach c) higher processing power or signal processing in the electronic assembly 130 is needed.
  • the reader 100 has, in addition to the above-mentioned typical components, an orientation device 160 which serves to simplify the determination of the direction to the transponder 200.
  • Orientation detector 160 in a first embodiment, permits the absolute determination of the orientation of reading device 100 in space.
  • the orientation detector 160 may be formed, for example, as an electronic compass 160.
  • the compass 160 is integrated in the reading device 100 and connected to the electric ⁇ nikbauuite 130th While the main beam direction of the antenna device 110 is pivoted in space, as explained in connection with the method a) or b), and the signal strength received by the transponder 200 is measured, the orientation R of the reading device 100 in the space is determined simultaneously with the compass.
  • These two data sets are supplied to the electronic module 130, where they are matched with one another or assigned to one another.
  • This adjustment can, for example, consist in that the signal strength S (tl) measured at a time t 1 corresponds to the same Time tl determined orientation R (tl) is assigned.
  • R (tl) Time tl determined orientation
  • Transponder points, so the direction to the transponder can be determined.
  • an orientation detector 160 can be used, which only allows the determination of a relative orientation or the determination of an orientation change.
  • This relative orientation refers to a specific starting position of the reading device.
  • the initial position can, for example, the orientation of the reader at the time of turning on the Lesegerä ⁇ tes or at the time of activating a search mode or similar. be.
  • a switch may be provided (not ones shown, asserted), the starting position Festge than the current orientation of the reader when actuated ⁇ is inserted.
  • Such an orientation detector 160 for determining a relative orientation relative to a starting position may be a relative sensor system, such as a gyro 160.
  • the orientation detector 160 of the reader 100 does not allow an absolute determination of the orientation, but only the detection of a change in orientation. However, this is completely sufficient for the purpose of determining the direction to the transponder 200. Also in the second embodiment, the main beam direction of the antenna device 110 of the reader 100 is pivoted in space and in this case measured from the received transponder 200 Sig ⁇ nalgo. At the same time, the gyro 160 determines the change in the orientation R of the reading device 100 in the room. These two records will be electronic Subassembly 130 is supplied, where they are compared with each other ⁇ .
  • Both embodiments have in common that automatically can be displayed in the direction in which the transponder is based on the simultaneous determination of the signal strength and the absolute or relative orientation.
  • the determination of the direction is significantly simplified because the user of the reader no longer has to manually search for the maximum signal.
  • an additional relative sensors 170 for example.
  • Transponder 200 are using the relative sensor 170 at least changes in the orientation of the reading device 100 quantitatively ⁇ tively detected, ie in particular rotations about the vertical. In addition, changes in position could also be detected. These data are supplied to the electronic module 130. There they are used, for example, to improve the result of the directional estimation described above or, for example, during or after a movement of the reading device 100 in the room to verify or correct. Alternatively or additionally, with the aid of the output data of the relative sensor system 170, for example in the case that the
  • the various assemblies of the reader 100 i. the antenna device 110, the display 120, the pivot 140, the sensor 150, the electronic compass 160, and the optional relative sensor 170 are all connected to the electronics assembly 130 (not shown).
  • the distance from the reading device 100 to the transponder 200 can also be estimated on the basis of the measured signal strength and displayed on the display device 120.
  • Relative sensor system 170 can also be used to determine the distance between reader 100 and transponder 200: Relative sensor system 170 determines a distance traveled or a change in position of reader 100, while at the same time the signal strength of transponder signal S is measured. These data are supplied to the electronic module 130. Since the signal strength weakens with the distance to the transponder 200, it is possible to deduce the course of the signal strength in the direction in which the transponder 200 is located. For example. If the signal strength decreases, it can be assumed that you are moving away from the transponder 200 and vice versa.
  • the transponder 200 is in the direction in which the Signal strength increases or decreases fastest.
  • a directional antenna is not required for this purpose.
  • Transponder described. In principle, however, it is not absolutely necessary for the functionality that it is an active transponder, ie, in principle, passive transponders can also be used, which can be used, for example. received signal from the reader, modulate if necessary and send out again.
  • the reading device can be designed, for example, in the manner of a PDA (Personal Digital Assistant).
  • PDA Personal Digital Assistant

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Artificial Intelligence (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

L'invention concerne un lecteur mobile et procédé pour détecter un objet marqué par un transpondeur actif. Le lecteur présente un dispositif d'antenne (110) pour recevoir un signal, émis par le transpondeur, où le dispositif d'antenne présente un axe radioélectrique. De plus un module électronique est prévu pour calculer une direction du lecteur au transpondeur en s'appuyant sur le signal reçu. Par ailleurs le lecteur présente un détecteur d'orientation, p.ex. un compas électronique, avec lequel une orientation absolue du lecteur par rapport à un espace externe peut être déterminée. Pendant que l'axe radioélectrique de l'antenne est pivoté dans l'espace et que l'intensité du signal est mesurée, simultanément on détermine l'orientation dans l'espace. Une attribution de l'orientation, déterminée au moment t, par rapport à l'intensité du signal, mesurée au même moment, permet de déterminer la direction du transpondeur, car on peut partir du principe que le signal présente un maximum, lorsque l'axe radioélectrique pointe dans la direction du transpondeur.
EP10790399A 2010-02-05 2010-12-07 Lecteur mobile et procédé pour détecter un objet marqué par un transpondeur actif Withdrawn EP2517146A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010006982A DE102010006982A1 (de) 2010-02-05 2010-02-05 Mobiles Lesegerät und Verfahren zum Auffinden eines mit einem aktiven Transponder markierten Objekts
PCT/EP2010/069025 WO2011095244A1 (fr) 2010-02-05 2010-12-07 Lecteur mobile et procédé pour détecter un objet marqué par un transpondeur actif

Publications (1)

Publication Number Publication Date
EP2517146A1 true EP2517146A1 (fr) 2012-10-31

Family

ID=43500133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10790399A Withdrawn EP2517146A1 (fr) 2010-02-05 2010-12-07 Lecteur mobile et procédé pour détecter un objet marqué par un transpondeur actif

Country Status (5)

Country Link
US (1) US20130194078A1 (fr)
EP (1) EP2517146A1 (fr)
CN (1) CN102725764B (fr)
DE (1) DE102010006982A1 (fr)
WO (1) WO2011095244A1 (fr)

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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
DE102012217146A1 (de) * 2012-09-24 2014-03-27 Robert Bosch Gmbh Mobile Empfangseinheit, Verfahren zur Bedienung der mobilen Empfangseinheit sowie Computerprogramm
TWI527492B (zh) 2014-05-14 2016-03-21 和碩聯合科技股份有限公司 電子裝置
CN104052520B (zh) * 2014-06-27 2017-01-04 歌尔科技有限公司 一种可穿戴无线定位指示装置
CN104218964B (zh) * 2014-09-04 2016-06-29 青岛海信移动通信技术股份有限公司 一种移动终端及Wi-Fi天线控制方法
TWI598612B (zh) * 2015-03-20 2017-09-11 傅成龍 媒合系統與媒合方法
US11026066B2 (en) * 2017-09-14 2021-06-01 Airmagnet, Inc. Determining wireless network device location
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Also Published As

Publication number Publication date
CN102725764B (zh) 2015-04-15
US20130194078A1 (en) 2013-08-01
WO2011095244A1 (fr) 2011-08-11
CN102725764A (zh) 2012-10-10
DE102010006982A1 (de) 2011-08-11

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