DE3307579A1 - DEVICE FOR CONTACTLY INQUIRING A RELATED DATA CARRIER - Google Patents

DEVICE FOR CONTACTLY INQUIRING A RELATED DATA CARRIER

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Publication number
DE3307579A1
DE3307579A1 DE19833307579 DE3307579A DE3307579A1 DE 3307579 A1 DE3307579 A1 DE 3307579A1 DE 19833307579 DE19833307579 DE 19833307579 DE 3307579 A DE3307579 A DE 3307579A DE 3307579 A1 DE3307579 A1 DE 3307579A1
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DE
Germany
Prior art keywords
frequency
data carrier
data
circuit
transmitter
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
DE19833307579
Other languages
German (de)
Inventor
Jürgen Dipl.-Ing. 8017 Ebersberg Machate
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Individual
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Individual
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 Individual filed Critical Individual
Priority to DE19833307579 priority Critical patent/DE3307579A1/en
Priority to EP19840901065 priority patent/EP0135570A1/en
Priority to PCT/EP1984/000056 priority patent/WO1984003566A1/en
Publication of DE3307579A1 publication Critical patent/DE3307579A1/en
Ceased 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
    • 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
    • G01S13/751—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 wherein the responder or reflector radiates a coded signal
    • G01S13/753—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 wherein the responder or reflector radiates a coded signal using frequency selective elements, e.g. resonator
    • 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
    • G01S13/751—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 wherein the responder or reflector radiates a coded signal
    • G01S13/758—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 wherein the responder or reflector radiates a coded signal using a signal generator powered by the interrogation signal

Abstract

The device is composed of a transmitting portion (1, 2, 3) providing the energy supply for the data support (4), as well as of a receiving (8, 9, 10, 11) and evaluating portion (12), processing the data sent back by the data support. Both energy and data transmission are carried out contactless by induction. The frequency ratio (n) of the transmitted signal to the received signal allows for a disturbance-free operation of the device with a simple design. The device can be used with integrated semiconductor cards, so-called chips, as well as with labels for anti-theft systems.

Description

Einrichtung zur kontaktlosen Abfrage eines zugehörigen Daten-Device for contactless query of an associated data

trägers Das berührungslose Erfassen von Daten eines bewegten Objektes ist bei sehr unterschiedlichen Anwendungerl erforuerlich, von denen nachfolgend einige genannt werden.carrier The contactless acquisition of data from a moving object is necessary for very different applications, of which the following some are named.

Bei der Diebstahlsicherung in Kaufhäusern werden Marken unsichtbar an den zu schützenden Gegenständen befestigt, die im normalfall vom Kassenpersonal vor dem Verlassen des Kaufhauses entfernt werden. Bei Diebstahl meldet die Sicherungsanlage, daß sich beim Verlassen des Kaufhauses die Marke noch an der Ware befindet. Es bestehen also lediglich zwei Datenzustande, Marke vorhanden oder nicht vorhanden.When it comes to theft protection in department stores, brands become invisible attached to the objects to be protected, which are normally handled by the cashier removed before leaving the store. In the event of theft, the security system reports that when you leave the store, the brand is still on the goods. There are so only two data states, brand present or not present.

Bei der Steuerung von Fertigungsabläufen tragen die zu steuernden Materialien Informationen die zu ihrer Identifikation erforderlich sind um die vorgegebenen Abläufe steuern zu können.When controlling production processes, those to be controlled are responsible Materials Information necessary for their identification to the given To be able to control processes.

In zunehmendem Maße werden kartenförmige Datenträger eingesetzt deren Informationen zur maschinellen Identifikation des Inhabers benutzt werden. Üblicherweise werden hierfür Lesevorrichtungen verwendet bei denen die Karten in einen Leseschlitz eingeschoben werden. Es wäre jedoch häufig von großem Vorteil wenn die Karten über größere Entfernungen ausgelesen werden könnten.Card-shaped data carriers are being used to an increasing extent Information for the machine identification of the owner can be used. Usually reading devices are used for this, in which the cards are inserted into a reading slot be inserted. However, it would often be of great benefit if the cards were over larger distances could be read out.

Ein weiterer Anwendungsfall ist das Orten von nregenständen.Another use case is the location of rain.

Dies kann zum Beispiel das Auffinden von verschütteten Personen sein, die eine entsprechende Marke tragen.This can be, for example, finding people who have been buried, that have a corresponding brand.

Normalerweise bestehen die Auslesevorrichtnen aus einem Sende- und einem Empfangsteil. Viele derartige Einrichtungen arbeiten mit einem Licht-ender und einem optoelektronischen Empfänger. Die Daten werden auf dem attr:ier durch Zonen starker und schwacher Lichtabsorbtion gebildet. Derartige Anordnungen weisen den Nachteil auf, daß größere Distanzen zwischen der Auslesevorrichtung und dm Datenträger wegen der Fremdlichteinwirkung schwer zu realisieren sind; außerdem können die Datenträger leicht durch Verschmutzung verfälscht werden. Es sind weiterhin Vorrichtungen bekannt, die die Daten von kartenförmigen Datenträgern euf induktiver (DP 25 58 917) oder auf kapazitivem Wege (DP 28 12 3c38) auslesen. Der Nachteil dieser Lesevorrichtungen ist der, daß sie nur in räumlich enger Anordnung von Sender und Empfänger funktionieren; wie z.B. bei Kartenlesern. Eine andere Vorrichtung (DO 27 4 5$ hat einen Hochfrequenzsender, der über eine Antenne auf den Eingang eines auf gleiche Frequenz abgestimmten Empfängers koppelt. Wird in die Strecke zwischen Sende- und Empfangsar.-tenne ein elektrischer, auf die Sendefrequenz abgestimmte: Resonanzkreis eingebracht, so bewirkt dieser wegen der auftretenden Absorption bezw. der Feldverdrängung eine Verminderung der empfangenen Spannung. Diese Verminderung wird aus gewertet. Die Anordnung wirkt zwar über größere Distanzen, ist aber wegen der geringen Feldänderung sehr störanfällig; ungewollte Absorbtionen durch Metallgegenstände . Außerdem kann nen leicht Störungen durch übliche Störstrahler, wie Autos oder Elektrogeräte verursacht werden.Normally, the readout devices consist of a transmitting and a a receiving part. Many such devices work with a light-end and an optoelectronic receiver. The data are processed on the attr: ier Zones of strong and weak light absorption formed. Such arrangements show the disadvantage that greater distances between the readout device and the data carrier are difficult to realize due to the influence of extraneous light; in addition, the disks easily falsified by pollution will. There are still Devices known that the data from card-shaped data carriers euf inductive (DP 25 58 917) or capacitive (DP 28 12 3c38). The disadvantage of these reading devices is that they can only be used in a spatially close arrangement of the transmitter and receivers work; such as with card readers. Another device (DO 27 4 5 $ has a high frequency transmitter that is connected to the entrance via an antenna a receiver tuned to the same frequency. Will get into the route between the transmitting and receiving antenna, an electrical antenna tuned to the transmission frequency: Introduced resonance circuit, this causes BEZW because of the absorption occurring. the field displacement a reduction in the received voltage. This diminution is evaluated. The arrangement works over greater distances, but is due to very susceptible to failure due to the small field change; unwanted absorption by metal objects . In addition, interference from common stray radiation sources such as cars or Electrical appliances.

Der Erfindung liegt die Aufgabe zu grunde ei-r.e Einrichtung zur kontaktlosen Abfrage von Datenträgern zu schaff-n, ie di oben genannten Nachteile vermeidet.The invention is based on the object of a device for contactless To create query of data carriers, ie avoid the disadvantages mentioned above.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Datenträger durch einen hochfrequenten Sender mit dem Frequenz fs angeregt wird und mit Hilfe eines Schaltelementes eine Frequenz h.fs erzeugt, die von einem init der Sendefrequenz fs synchronisierten Empfänger aufgenommen und verarteitet wird.According to the invention, this object is achieved in that the data carrier is excited by a high frequency transmitter with the frequency fs and with the help of a switching element generates a frequency h.fs that is controlled by an init of the transmission frequency fs synchronized receiver is recorded and processed.

In Figur 1 ist die grundsätzliche Anordnung der Abfragevorrichtung dargestellt. Der Hochfrequenzgenerator 1 mit der Frequenz fs speist sowohl über den Tiefpaß 2 die Sendeantenre 3 als auch den Frequenzumsetzer 10 Die Se@@ ante@ne 3 kopplet mwt dem Kopplungsfaktor K auf den Datenträger 4. er @ate@träger erzeugt die Frequenz n.fs, dle mit dem Kopiurgsfaktor k auf die Empfangsantenne 8 der Empfangseinrichtung koppelt.In Figure 1 is the basic arrangement of the interrogation device shown. The high frequency generator 1 with the frequency fs feeds both over the low-pass filter 2, the transmitting antenna 3 as well as the frequency converter 10 The Se @@ ante @ ne 3 couplet mwt the coupling factor K to the data carrier 4. er @ ate @ carrier generated the frequency n.fs, dle with the copy factor k on the receiving antenna 8 of the receiving device couples.

Im Mischer 9 wird die Eingangsfrequenz n.fs mit der im t:req :enzumsetzer 10 erzeugten Frequenz n.fs + fz gemischt, sodaß am Ausgang des Bandpasses 11 ein Meßsignal mit der Frequenz fz der Auswerteschaltung 12 zur Verfügung steht. Im Prinzip sind alle Fakttren n möglich. Technisch sind jedoch nur einige sinnvoll wie an Hand der nachfolgend beschriebenen Datenträger 4 eezeigt wird. In Figur 2 ist der grundsätzliche Aufbau de Datenträgers 4 dargestellt, der aus einem Empfangselement 5, einem Schaltelement 6 und einem Sendeelement 7 besteht.In the mixer 9, the input frequency n.fs is converted to the im t: req: enzumetzer 10 generated frequency n.fs + fz mixed, so that at the output of the Bandpass 11 a measurement signal with the frequency fz of the evaluation circuit 12 is available. In principle, all facts are possible. Technically, however, only a few make sense as shown on the basis of the data carrier 4 described below. In Figure 2 the basic structure of the data carrier 4 is shown, which consists of a receiving element 5, a switching element 6 and a transmitting element 7 consists.

Eine besondere Ausgestaltung des Datenträgers zeigt Figur 3.A special embodiment of the data carrier is shown in FIG. 3.

Das Empfangselement besteht aus einem Schwingkreis mit der Spule 51 und dem Kondensator 52, der auf die Sendefrequenz fs abgestimmt ist. Das Schaltelement besteht aus einer Diode 61 die im nachgeschalteten Schwingkrets, bestehend aus der Spule 71 und dem Kondensator 72 Oberwellen der Sendefrequenz fs erzeugt.The receiving element consists of an oscillating circuit with the coil 51 and the capacitor 52, which is tuned to the transmission frequency fs. The switching element consists of a diode 61 in the downstream Schwingkrets, consisting of the Coil 71 and the capacitor 72 generated harmonics of the transmission frequency fs.

Durch entsprechende Dimensionierunq des Schwingkreises können damit Frequenzen mit n.fs (n = 1,2,3... ) erzeugt und auf die Empfangsantenne 8 eingekoppelt werten. Der Umsetzer 10 arbeitet mit demselben Faktor n, so daß bei vorhandenem, bezw. aktiviertem Datenträger eine Zwischenfrequenz fz gebildet wird.By appropriate dimensioning of the resonant circuit, you can Frequencies with n.fs (n = 1,2,3 ...) generated and coupled to the receiving antenna 8 evaluate. The converter 10 works with the same factor n, so that with existing, respectively activated data carrier an intermediate frequency fz is formed.

Der Vorteil dieser Anordnung beruht auf der festen Zuordnung von Sendefrequenz fs und der vom Datenträger erzeugten Frequenz n.fs. Dadurch kann der Empfänger exakt, durch Synchronisation mit der Sendefrequenz, auf die zu erwartende Empfangsfrequenz eingestellt werden. Die Empfängerbandbreite kann sehr klein genalten werden, womit Störungen durch Störsender ausgeblendet werden. Zur Unterscheidung des Nutzsignales von gleichfrequenten Störsignalen kann eine Phasenauswertung durchgeführt werden, da das Nutzsignal in einem festen Phasenverhältnis zum Sendesignal steht. Störungen durch absorbierende Metallteile treten kaum auf, da in erster Linie nict die Amplitude sondern die Frequenz des am Mischer 9 anlieger.den wingangssignales ausgewertet wird. Der beschriebene DatFntrager wird nur hinsichtlich seines Vorhandenseins geprüft. Die unterschiedliche Auslegung der Resonanzfrequenzen der Eingangskreise 5 und der Sendekreise O ermöglicht'die Selektion verschiedener Datenträger in dem sowohl der Sender und der Empfänger synchron in der Frequenz ge-; ändert werden.The advantage of this arrangement is based on the fixed assignment of transmission frequencies fs and the frequency generated by the data carrier n.fs. This allows the recipient to exactly through synchronization with the transmit frequency, to the expected receive frequency can be set. The receiver bandwidth can be kept very small, which means Interferences caused by jammers are hidden. To differentiate the useful signal A phase evaluation can be carried out for interference signals of the same frequency, because the useful signal has a fixed phase relationship to the transmitted signal. Disruptions due to absorbent metal parts hardly occur, since primarily the amplitude does not occur but the frequency of the wingangssignales on the mixer 9 anlieger.den evaluated will. The data requester described is only checked with regard to its existence. The different interpretation of the resonance frequencies of the input circuits 5 and the Sending circles O enables the selection of different data carriers in which both the The transmitter and the receiver are synchronized in frequency; will be changed.

Die Übertragung eines binären Datenwortes ist mit einem Datenträger entsprechend Figur 4 möglich. Das Schaltelement 6 besteht aus einem integrierten Schaltkreis der vom Empfangskreis 51, 52 mit Hilfe der Diode 53 und des Glättungskondcnsators =4 mit Gleichspannung versorgt wird. Der Schaltkreis beinhaltet einen Teiler 62 der die Frequenz n.fs erzeugt die der Sender kreis 71, 72 an die Empfangsantenne 8 abstrahlt. Weiterhin liefert der Teiler 62 die Taktfrequenz für die Adressierung des Datenspeichers 63. Entsprechend dem Datenfluß am Ausgang di Speichers 63 wird der Sendekreis 71. 72 mit Hilfe des Schalters 6 mit der Frequenz n.fs erregt oder nicht erregt. Es wirdBwie Figur 5 darstellt> nach Einschalten der Sendefrequenz fs ein serieller Datenstrom mit der Frequenz n.fs im Intervall der Speicherdaten d erzeugt, Bei dieser Anordnung ist der Faktor n<1 (1/2; 1/3; 1/4.The transmission of a binary data word is with a data carrier possible according to FIG. The switching element 6 consists of an integrated The circuit of the receiving circuit 51, 52 with the aid of the diode 53 and the smoothing capacitor = 4 is supplied with DC voltage. The circuit includes a divider 62 the frequency n.fs generated by the transmitter circuit 71, 72 to the receiving antenna 8 emits. The divider 62 also supplies the clock frequency for addressing of the data memory 63. According to the data flow at the output di memory 63 the transmission circuit 71. 72 with the help of the switch 6 with the frequency n.fs or excited not aroused. It is shown as FIG. 5> after switching on the transmission frequency fs a serial data stream with the frequency n.fs in the interval of the memory data d, with this arrangement the factor n <1 (1/2; 1/3; 1/4.

Der Vorteil der festen Synchronisation von Sender und Empfänger ist auch hier gegeben.The advantage of the fixed synchronization of transmitter and receiver is also given here.

Claims (5)

Patentansprüche 1. Einrichtung zur kontaktlosen Abfrage des zugehörige. rtenträgers, der durch einen hochfrequenten Sender angeregt wird und dessen Daten von einem Hochfrequenzempfänger aufgenommen werden, dadurch gekennzeichnet, daß der Datenträger einen Empfangskreis aufweist der durch Kopplung mit dem Sender eine Wechselspannung mit der Frequenz fs des Senders erzeugt und daß diese Wechselspannung durch das Schaltelement des Datenträgers in eine andere Wechselspannung mit der Frequenz n.fs umgesetzt wird, die durch den Sendekreis des Datenträgers auf den mpfager übertragen wird, dessen maximale Eingangsempfindlichkeit durch die von der Sendefrequenz abgeleiteten .rdischfrequenz n.fs + fz auf die Frequenz n.fs festgelegt ist. Claims 1. Device for contactless query of the associated. carrier that is excited by a high-frequency transmitter and its data are picked up by a high frequency receiver, characterized in that the data carrier has a receiving circuit which is coupled to the transmitter Alternating voltage with the frequency fs generated by the transmitter and that this alternating voltage through the switching element of the data carrier to a different alternating voltage with the Frequency n.fs is implemented by the transmission circuit of the data carrier on the mpfager, whose maximum input sensitivity is determined by the Transmission frequency derived. Terrestrial frequency n.fs + fz set to the frequency n.fs is. 2.) Ausgestaltung des Datenträgers nach Anspruch 1 derart, daß das Schaltelement eine Diode ist und daß dadurch Oterwellen der Sendefrequenz erzeugt werden.2.) Design of the data carrier according to claim 1 such that the The switching element is a diode and that this generates Oterwellen the transmission frequency will. 3.) Ausgestaltung des Datenträgers nach Anspruch 1 derart, aaß das Schaltelement ein integriegrter Schaltkreis ist, der mit Hilfe einer Gleichrichterschaltung vom Empfangskreis mit Energie versorgt wird.3.) Design of the data carrier according to claim 1 such that aass Switching element is an integrated circuit, which with the help of a rectifier circuit is supplied with energy by the receiving circuit. 4.) Ausgestaltung des Datenträgers nach Anspruch 3 derart, daß der Schaltkreis einen Teiler hat-, der Frequenzen n.fs mit n<1 erzeugt.4.) Design of the data carrier according to claim 3 such that the Circuit has a divider that generates frequencies n.fs with n <1. 5.) Ausgestaltung des Datenträgers nach Anspruch 3 derart, daß der Schaltkreis einen Datenspeicher aufweist. dessen Daten in serieller rorm durch F,rregen bezw. NichterregenS zum Empfänger übertragen werden.5.) embodiment of the data carrier according to claim 3 such that the circuit has a data memory. whose Data in serial format by F, rregen or. Non-excitement can be transmitted to the receiver.
DE19833307579 1983-03-03 1983-03-03 DEVICE FOR CONTACTLY INQUIRING A RELATED DATA CARRIER Ceased DE3307579A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19833307579 DE3307579A1 (en) 1983-03-03 1983-03-03 DEVICE FOR CONTACTLY INQUIRING A RELATED DATA CARRIER
EP19840901065 EP0135570A1 (en) 1983-03-03 1984-03-01 Device for contactless interrogation of a data support
PCT/EP1984/000056 WO1984003566A1 (en) 1983-03-03 1984-03-01 Device for contactless interrogation of a data support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833307579 DE3307579A1 (en) 1983-03-03 1983-03-03 DEVICE FOR CONTACTLY INQUIRING A RELATED DATA CARRIER

Publications (1)

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DE3307579A1 true DE3307579A1 (en) 1984-11-29

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DE19833307579 Ceased DE3307579A1 (en) 1983-03-03 1983-03-03 DEVICE FOR CONTACTLY INQUIRING A RELATED DATA CARRIER

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EP (1) EP0135570A1 (en)
DE (1) DE3307579A1 (en)
WO (1) WO1984003566A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
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EP0282992A2 (en) * 1987-03-17 1988-09-21 Omron Tateisi Electronics Co. Method of controlling communication in an ID system
DE4001163A1 (en) * 1989-10-09 1991-04-11 Pepperl & Fuchs Reading of identification code for access to secured area - using inductive non-contact reading of code carrier located on object
DE4001162A1 (en) * 1990-01-17 1991-09-05 Pepperl & Fuchs Inductive contactless identification system - generates pulses of opposite polarity enabling greater separation of code carrier and read-write head
DE4007453A1 (en) * 1990-03-09 1991-09-12 Telefunken Electronic Gmbh DEVICE FOR MONITORING OBJECTS
DE4025229A1 (en) * 1990-08-09 1992-02-20 Uwe Heyer Universally applicable coding system - accepts bar code or laser reader for automatic contactless code read=out
DE4227551A1 (en) * 1992-08-20 1994-02-24 Eurosil Electronic Gmbh Chip card with field strength detector
DE4414399A1 (en) * 1994-04-26 1994-09-15 Siegfried Mehl Anti-theft element
DE19621823A1 (en) * 1996-05-31 1997-12-04 Vendoret Holding Sa Shopping or luggage trolley forfeit with key function
DE102011115721B4 (en) 2011-10-12 2022-02-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. System for wireless energy transfer

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JP2612190B2 (en) * 1988-08-31 1997-05-21 山武ハネウエル株式会社 Full-duplex communication device consisting of answering device and interrogation device
FR2679358B1 (en) * 1991-07-16 1994-03-18 Commissariat A Energie Atomique COMMUNICATION SYSTEM BETWEEN AN INTERROGATING TRANSCEIVING DEVICE AND AN ANSWERING RECEIVING DEVICE.
US5451958A (en) * 1993-05-21 1995-09-19 Texas Instruments Deutschland Gmbh Dual standard RF-ID system
FR2741980B1 (en) * 1995-12-01 1998-01-23 Pierre Raimbault METHOD FOR PHASING ELECTRONIC LABELS QUERY STATION AND ELECTRONIC LABEL FOR IMPLEMENTING IT

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EP0025816A2 (en) * 1979-05-16 1981-04-01 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Arrangement for the automatic identification of objects and/or living beings

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AT234762B (en) * 1961-01-27 1964-07-27 Siemens Ag Device in systems for the automatic wireless transmission of multi-digit information between mutually movable interrogation and response devices, in particular the numbers of railway vehicles to stationary interrogation devices
DE1591511A1 (en) * 1967-07-07 1970-02-12 Siemens Ag System for automatic wireless transmission of multi-digit information between mutually movable interrogation and response devices, in particular the numbers of railway vehicles to stationary interrogation devices
EP0025816A2 (en) * 1979-05-16 1981-04-01 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Arrangement for the automatic identification of objects and/or living beings

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282992A2 (en) * 1987-03-17 1988-09-21 Omron Tateisi Electronics Co. Method of controlling communication in an ID system
EP0282992A3 (en) * 1987-03-17 1991-10-16 Omron Tateisi Electronics Co. Method of controlling communication in an id system
DE4001163A1 (en) * 1989-10-09 1991-04-11 Pepperl & Fuchs Reading of identification code for access to secured area - using inductive non-contact reading of code carrier located on object
DE4001162A1 (en) * 1990-01-17 1991-09-05 Pepperl & Fuchs Inductive contactless identification system - generates pulses of opposite polarity enabling greater separation of code carrier and read-write head
DE4007453A1 (en) * 1990-03-09 1991-09-12 Telefunken Electronic Gmbh DEVICE FOR MONITORING OBJECTS
DE4025229A1 (en) * 1990-08-09 1992-02-20 Uwe Heyer Universally applicable coding system - accepts bar code or laser reader for automatic contactless code read=out
DE4227551A1 (en) * 1992-08-20 1994-02-24 Eurosil Electronic Gmbh Chip card with field strength detector
US5418358A (en) * 1992-08-20 1995-05-23 Temic Telefunken Microelectronic Gmbh Chip card with field strength detector having a switch and load to limit damping to the measurement cycle
DE4414399A1 (en) * 1994-04-26 1994-09-15 Siegfried Mehl Anti-theft element
DE19621823A1 (en) * 1996-05-31 1997-12-04 Vendoret Holding Sa Shopping or luggage trolley forfeit with key function
DE102011115721B4 (en) 2011-10-12 2022-02-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. System for wireless energy transfer

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Publication number Publication date
EP0135570A1 (en) 1985-04-03
WO1984003566A1 (en) 1984-09-13

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