DE19720747C2 - Security element containing a transponder - Google Patents

Security element containing a transponder

Info

Publication number
DE19720747C2
DE19720747C2 DE19720747A DE19720747A DE19720747C2 DE 19720747 C2 DE19720747 C2 DE 19720747C2 DE 19720747 A DE19720747 A DE 19720747A DE 19720747 A DE19720747 A DE 19720747A DE 19720747 C2 DE19720747 C2 DE 19720747C2
Authority
DE
Germany
Prior art keywords
security element
transponder
element according
core
area
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.)
Expired - Lifetime
Application number
DE19720747A
Other languages
German (de)
Other versions
DE19720747A1 (en
Inventor
Markus Spreng
Martin Miehling
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.)
Smartrac Technology Germany GmbH
Original Assignee
Sokymat Identifikations Komponenten GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sokymat Identifikations Komponenten GmbH filed Critical Sokymat Identifikations Komponenten GmbH
Priority to DE19720747A priority Critical patent/DE19720747C2/en
Publication of DE19720747A1 publication Critical patent/DE19720747A1/en
Application granted granted Critical
Publication of DE19720747C2 publication Critical patent/DE19720747C2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/073—Special arrangements for circuits, e.g. for protecting identification code in memory
    • G06K19/07309—Means for preventing undesired reading or writing from or onto record carriers
    • G06K19/07372—Means for preventing undesired reading or writing from or onto record carriers by detecting tampering with the circuit
    • G06K19/07381—Means for preventing undesired reading or writing from or onto record carriers by detecting tampering with the circuit with deactivation or otherwise incapacitation of at least a part of the circuit upon detected tampering
    • G06K19/0739—Means for preventing undesired reading or writing from or onto record carriers by detecting tampering with the circuit with deactivation or otherwise incapacitation of at least a part of the circuit upon detected tampering the incapacitated circuit being part of an antenna
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07758—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07798—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card part of the antenna or the integrated circuit being adapted for rupturing or breaking, e.g. record carriers functioning as sealing devices for detecting not-authenticated opening of containers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2414—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags
    • G08B13/2417—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags having a radio frequency identification chip
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2414—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags
    • G08B13/242—Tag deactivation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2431—Tag circuit details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/003—Printed circuit coils

Description

Die Erfindung betrifft ein Sicherheitselement enthaltend eine einen Transponder bildende Einheit aus einem elektronischen Miniaturschaltkreis und einer elektrischen Wicklung, die elektrisch miteinander verbunden auf oder in einem gemeinsamen Träger angeordnet sind, wobei der Transponder zu seiner Identifizierung mit einem externen Lesegerät koppelbar ist. Die Erfindung betrifft auch dessen Verwendung als fälschungssicheres Etikett oder Siegel.The invention relates to a security element containing a unit forming a transponder from one miniature electronic circuit and an electrical Winding that is electrically connected on or are arranged in a common carrier, the Transponder for its identification with an external one Reader can be coupled. The invention also relates to its use as a forgery-proof label or Seal.

Transponderelemente der bekannten Art sind bekannt (WO 87/04900). Aufgrund der Eigenschaften des Transponders kann der mit dem Transponderelement versehene Gegenstand, beispielsweise ein Lebewesen, wie ein Fisch, beim Passieren eines externen Lesegerätes identifiziert werden. Aufgrund der Vielfalt der Codierungsmöglichkeiten des Transponders über den im Miniaturschaltkreis hinterlegten Datencode ergibt sich eine hohe Anzahl von unterschiedlichen Identifikationsmöglichkeiten.Transponder elements of the known type are known (WO 87/04900). Due to the properties of the transponder can the object provided with the transponder element, for example a living being, like a fish, at the Passing an external reader identified become. Because of the variety of coding options of the transponder via the in the miniature circuit stored data code results in a high number of different identification options.

Ein Transponderbauelement, wie es aus der EP 0 573 469 bekannt ist, zeichnet sich dadurch aus, daß der Miniaturschaltkreis und die Wicklung nur über die wickeldrahtenden miteinander verbunden sind, die auf den metallischen Leiterbahnen des Miniaturschaltkreises verschweißt oder verlötet sind. Die so hergestellte Einheit aus Schaltkreis und Wicklung wird anschließend auf oder in dem Träger untergebracht. Als Träger kommen alle Arten von nicht leitenden Materialien, insbesondere Glas oder Kunststoff, in Frage.A transponder component as it is known from EP 0 573 469 is known, characterized in that the Miniature circuit and the winding just over the winding wire ends that are connected to each other metallic conductor tracks of the miniature circuit are welded or soldered. The so made  The unit consisting of circuit and winding then becomes housed on or in the carrier. Come as a carrier all types of non-conductive materials, in particular Glass or plastic, in question.

Transponderelemente der eingangs genannten Art werden in der Praxis aufgrund der bislang vergleichsweise hohen Produktionskosten nur dort eingesetzt, wo der Investitionsaufwand dies rechtfertigt, beispielsweise im Zusammenhang mit Schlüsseleinrichtungen für PKWs, bei denen mittels des Transponderelementes eine gegenseitige Authentifizierung von Schlüssel und im Fahrzeug angebrachten Steuergerät erfolgt. Aufgrund der wesentlich größeren Anzahl verschiedener Kombinationsmöglichkeiten sind solche Schließeinrichtungen herkömmlichen mechanischen Schlüsseln überlegen.Transponder elements of the type mentioned are in practice due to the comparatively high so far Production costs only used where the Investment expenditure justifies this, for example in Connection with key facilities for cars, at a mutual one by means of the transponder element Authentication of keys and in the vehicle attached control unit takes place. Because of the essential larger number of different possible combinations such locking devices are conventional mechanical keys.

Andererseits sind Sicherheitselemente bekannt, die an oder auf dem zu sichernden Gegenstand oder dem als echt zu belegenden Gegenstand fest angebracht sind. Beispiele sind Sicherheitsetiketten für Bekleidungsstücke, die nur von einer authorisierten Person innerhalb des Kaufhauses lösbar am Bekleidungsstück angebracht sind und beim unberechtigten Verlassen einen im Ausgangsbereich des Kaufhauses ausgebildeten elektrischen Schwingkreis verstimmen, so daß ein Alarmsignal ausgelöst wird.On the other hand, security elements are known that are or on the object to be secured or as real object to be occupied are firmly attached. Examples are security labels for clothing that only by an authorized person inside the department store are detachably attached to the garment and at unauthorized leaving one in the exit area of the Department store-trained electrical resonant circuit detune so that an alarm signal is triggered.

Auch sind zur Echtheitsdokumentation von Geldscheinen oder Kreditkarten Holographieelemente bekannt, die aufgrund ihrer mikroskopischen Beugungsstrukturen eine hohe Fälschungssicherheit aufweisen. Also for authenticity documentation of banknotes or credit cards known holographic elements that due to their microscopic diffraction structures have high security against counterfeiting.  

Aus der DE 41 10 683 A1 ist ein Sicherungselement in Form eines Transponders bekannt, welcher u. a. in der Funktion als Diebstahlsicherungsmarker verwendet wird. Der Transponder besteht aus einer mit einem Schaltkreis verbundenen Spüle mit flächig ausgeführter Wicklung. Der Transponder weist Sollbruchstellen auf, die bei einem Ablöseversuch mosaikförmig auseinanderbrechen, so daß die Funktion vollständig zerstört wird.DE 41 10 683 A1 is a securing element in the form known a transponder, which u. a. in the function is used as an anti-theft marker. The Transponder consists of one with a circuit connected sink with flat winding. The Transponder has predetermined breaking points, which at one Detach attempt to break apart in a mosaic, so that the Function is completely destroyed.

Aus der DE 37 32 297 A1 ist ein Überwachungssystem für bewegliche Gegenstände bekannt, bei dem die Verstimmung eines im Transponder enthaltenen Schwingkreises dadurch erzielt wird, daß in Folge einer Schwächung des Sollschwächebereichs die Verbindung von zwei parallel geschalteten Resonanzkreisen aufgehoben wird.DE 37 32 297 A1 describes a monitoring system for Movable objects known, the detuning a resonant circuit contained in the transponder is achieved that as a result of a weakening of the Target weakness area the connection of two in parallel switched resonance circuits is canceled.

Der Erfindung liegt davon ausgehend die Aufgabe zugrunde, ein Sicherheitselement zu schaffen, welches einerseits ein größtmögliches Maß an Fälschungssicherheit aufweist und andererseits kostengünstig herstellbar ist.Based on this, the object of the invention is to create a security element which, on the one hand has the greatest possible level of security against counterfeiting and on the other hand is inexpensive to manufacture.

Diese Aufgabe wird bei einem Sicherheitselement enthaltend eine einen Transponder bildendende Einheit aus einer Spule mit einer auf einem Kern befindlichen Wicklung und einem Miniaturschaltkreis, der leitend mit der Spule verbunden auf oder in einem gemeinsamen Träger angeordnet ist, dadurch gelöst, daß der aus Spule und Miniaturschaltkreis gebildete Schwingkreis in Folge eines durch die Schwächung im Sollschwächbereich hervorgerufenen Bruches des Kerns derart verstimmt wird, daß dieses durch ein externes Lesegerät detektierbar ist. This task is done with a security element comprising a unit forming a transponder a coil with one on a core Winding and a miniature circuit that is conductive with the coil connected on or in a common carrier is arranged, solved in that the coil and Miniature circuit formed resonant circuit in a row through the weakening in the target weakening range caused breakage of the core is so detuned that this can be detected by an external reader.  

Die Erfindung zeichnet sich dadurch aus, daß bei einem Manipulationsvorgang das Sicherheitselement dahingehend belastet wird, daß im Sollschwächungsbereich ein Bruch eintritt. Durch den Bruch erfolgt eine bleibende Änderung der Resonanzfrequenz des durch Schaltkreis und Spule gebildeten Schwingkreises gegenüber dem unverformten Zustand. Ein entsprechend auf die Resonanzfrequenz abgestimmtes Lesegerät kann somit den Manipulationsvorgang detektieren. Bevorzugte Anwendung findet diese Variante der Erfindung bei solchen Transponderbauelementen, bei denen die Spule als Solenoid gebildet ist, wobei der Solenoid auf einem Kern aufgewickelt ist. Wenn der Kern des Solenoides im Bereich der Sollschwächungsstelle angeordnet ist, bricht dieser bei einer durch Manipulation hervorgerufenen Belastung aufgrund seiner Sprödigkeit, wodurch sich die Resonanzfrequenz des aus Solenoid und Schaltkreis gebildeten Resonanzkreises verändert.The invention is characterized in that at one Manipulation process the security element in this regard is charged that a break in the predetermined weakening range entry. The break causes a permanent change the resonant frequency of the through circuit and coil formed resonant circuit compared to the undeformed Status. A corresponding to the resonance frequency matched reader can thus Detect manipulation process. Preferred application finds this variant of the invention in such Transponder components where the coil is a solenoid is formed with the solenoid on a core is wound up. If the core of the solenoid in the area the predetermined weakening point is arranged, this breaks in the case of a load caused by manipulation due to its brittleness, which makes the Resonance frequency of the solenoid and circuit formed resonant circuit changed.

Ein besonders kostengünstiger Aufbau ergibt sich, wenn der Transponder ein READ ONLY Transponder ist. Anhand der im Transponder gespeicherten Daten kann jedes einzelne Sicherheitselement identifiziert werden. Wegen der Vielfalt der Kodierungsmöglichkeiten wirkt somit praktisch jedes einzelne Sicherheitselement als UnikatA particularly cost-effective construction results if the transponder is a READ ONLY transponder. Based on Each individual can store data stored in the transponder Security element to be identified. Because of the The variety of coding options is effective practically every single security element is unique

Ein Sicherheitselement mit weiter erhöhter Intelligenz ergibt sich dadurch, daß der Transponder ein WRITE/READ Transponder ist. Neben den auslesbaren Identifizierungsdaten können dem Transponder zusätzliche Daten zugeordnet werden, die beispielsweise einer externen Datenbank entnommen werden. Die Daten werden dabei mit einem externen Schreib/Lesegerät im Transponder gespeichert. A security element with further increased intelligence results from the fact that the transponder is a WRITE / READ Is transponder. In addition to the readable Identification data can be added to the transponder Data are assigned, for example one external database. The data will with an external read / write device in the transponder saved.  

Eine bevorzugte Ausführungsform ergibt sich dadurch, daß auf oder in dem Träger ein weiteres Identifikationselement angeordnet ist. Das weitere Identifikationselement wirkt unabhängig vom dem Sollbruchbereich zugeordneten ersten Identifikationselement, so daß das weitere Identifikationselement auch nach Zerstörung im Sollbruchbereich funktionsfähig bleibt. Hierdurch besteht die Möglichkeit, daß das beschädigte Sicherheitselement nach wie vor identifiziert werden kann.A preferred embodiment results from the fact that on or in the carrier another Identification element is arranged. The further Identification element acts independently of the Predetermined breaking area assigned first Identification element, so that the further Identification element even after destruction in the Predetermined breaking area remains functional. As a result the possibility that the damaged security element can still be identified.

Die Vielfalt der Nutzungsmöglichkeiten wird noch weiter dadurch erhöht, wenn das weitere Transponderelement auch READ/WRITE Transponder ist.The variety of possible uses continues thereby increased if the further transponder element too READ / WRITE transponder.

Bevorzugte Verwendungen der erfindungsgemäßen Lösung sind im Anspruch 1 fakultativ aufgeführt.Preferred uses of the solution according to the invention are listed optionally in claim 1.

Die Erfindung wird im folgenden anhand eines Ausführungsbeispiels näher erläutert.The invention is based on a Embodiment explained in more detail.

Die einzige Figur zeigt ein Ausführungsbeispiel gemäß der Erfindung. Hierzu zeigt die Figur einen Träger 1, welcher einen Flächenbereich 1a und einen daran angrenzenden stegförmigen Bereich 1b aufweist.The single figure shows an embodiment according to the invention. For this purpose, the figure shows a carrier 1 , which has a surface area 1 a and an adjoining web-shaped area 1 b.

Innerhalb des stegförmigen Bereichs 1b ist ein Ferritkern 4 angeordnet, der sich bis über den Bereich der Soll- Schwächung 1c hinaus erstreckt.A ferrite core 4 is arranged within the web-shaped area 1 b and extends beyond the area of the desired weakening 1 c.

Im Kopfbereich des Stegbereichs 1b ist auf dem Ferritkern eine Wicklung 2 in Form eines Solenoides angeordnet, dessen Enden mit einem Miniaturschaltkreis 3 verbunden sind. Die Verbindung zwischen Solenoide 2 und Miniaturschaltkreis 3 erfolgt nach dem aus der europäischen Patentschrift 0 573 469 bekannten Verfahren.In the head region of the land region 1 b, a winding 2 in the form of a solenoid is arranged on the ferrite core, the ends of which are connected to a miniature circuit 3 . The connection between the solenoids 2 and the miniature circuit 3 takes place according to the method known from European patent specification 0 573 469.

Die Resonanzfrequenz des so gebildeten Schwingkreises wird unter anderem durch die magnetischen Eigenschaften des Ferritkerns 4 bestimmt. Erfolgt nun eine Belastung des in der Figur dargestellten Gegenstandes, tritt im Sollschwächungsbereich bevorzugt eine Verformung auf, wodurch der Ferritkern 4 aufgrund der Sprödigkeit seines Materials bricht. Hierdurch ändert sich die Resonanzfrequenz des Transponderbauelementes.The resonance frequency of the resonant circuit thus formed is determined, among other things, by the magnetic properties of the ferrite core 4 . If the object shown in the figure is now loaded, a deformation preferably occurs in the predetermined weakening area, as a result of which the ferrite core 4 breaks due to the brittleness of its material. This changes the resonance frequency of the transponder component.

Diese Änderung ist einerseits irreversibel und tritt andererseits selbst dann ein, wenn die Einheit aus Spule 2 und Miniaturschaltkreis 3 als solche erhalten bleibt, so daß das Transponderelement an sich in seiner Funktion prinzipiell erhalten bleibt.On the one hand, this change is irreversible and, on the other hand, it occurs even if the unit consisting of coil 2 and miniature circuit 3 is retained as such, so that the function of the transponder element in principle is retained.

Wird nun mittels eines hierauf abgestimmten Empfängers die Resonanzfrequenz des Transponderbauelementes detektiert, so kann der Unterschied zwischen dem gebrochenen und nicht gebrochenen Ferritkern durch die gemessene Änderung der Resonanzfrequenz detektiert werden.Is now using a tuned receiver the resonance frequency of the transponder component detected, the difference between the broken and unbroken ferrite core through the measured change in the resonance frequency is detected become.

Hierdurch wird der Manipulationsvorgang entdeckt.In this way the manipulation process is discovered.

Claims (13)

1. Sicherheitselement, insbesondere zur Sicherung eines beweglichen Gegenstandes, zum Beispiel eines Bekleidungsartikels, oder zur Sicherung eines Raumes, enthaltend eine einen Transponder bildende Einheit aus einer Spule mit einer auf einem Kern befindlichen Wicklung (2) und einem Miniaturschaltkreis (3), der leitend mit der Spule verbunden auf oder in einem gemeinsamen Träger (1) angeordnet ist, wobei der aus Spule und Miniaturschaltkreis (3) gebildete Schwingkreis in Folge eines durch die Schwächung im Sollschwächbereich hervorgerufenen Bruches des Kerns derart verstimmt wird, daß dieses durch ein externes Lesegerät detektierbar ist.1. Security element, in particular for securing a movable object, for example an article of clothing, or for securing a room, containing a unit forming a transponder from a coil with a winding ( 2 ) located on a core and a miniature circuit ( 3 ) which is conductive connected to the coil is arranged on or in a common carrier ( 1 ), the resonant circuit formed from the coil and miniature circuit ( 3 ) being detuned as a result of a breakage of the core caused by the weakening in the desired weakening range in such a way that it can be detected by an external reading device is. 2. Sicherheitselement nach Anspruch 1, dadurch gekennzeichnet, daß die elektrische Wicklung (2) auf einem innerhalb des . Sollschwächungsbereiches angeordneten ferromagnetischen Kern angeordnet ist.2. Security element according to claim 1, characterized in that the electrical winding ( 2 ) on a within the. Desired weakening area arranged ferromagnetic core is arranged. 3. Sicherheitselement nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Transponder ein READ ONLY Transponder ist.3. Security element according to claim 1 or 2, characterized in that the Transponder is a READ ONLY transponder. 4. Sicherheitselement nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Transponder ein WRITE/READ Transponder ist. 4. Security element according to claim 1 or 2, characterized in that the Transponder is a WRITE / READ transponder.   5. Sicherheitselement nach einem der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, daß auf oder in dem Träger (1) mindestens ein weiteres Identifikationselement (4, 5, 6) angeordnet ist.5. Security element according to one of the preceding claims 1 to 4, characterized in that on or in the carrier ( 1 ) at least one further identification element ( 4 , 5 , 6 ) is arranged. 6. Sicherheitselement nach Anspruch 5, dadurch gekennzeichnet, daß das weitere Identifikationselement ein Barcode-Print (6) ist.6. Security element according to claim 5, characterized in that the further identification element is a barcode print ( 6 ). 7. Sicherheitselement nach Anspruch 5, dadurch gekennzeichnet, daß das weitere Identifikationselement ein weiterer Transponder (4, 5) ist, welcher aus einer weiteren Einheit aus Schaltkreis und zugeordneter Wicklung besteht.7. Security element according to claim 5, characterized in that the further identification element is a further transponder ( 4 , 5 ), which consists of a further unit consisting of a circuit and an associated winding. 8. Sicherheitselement nach Anspruch 7, dadurch gekennzeichnet, daß das weitere Transponderelement ein WRITE/READ Transponder ist.8. Security element according to claim 7, characterized in that the further transponder element a WRITE / READ transponder is. 9. Sicherheitselement nach einem der vorangehenden Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Träger (1) einen Flächenbereich (1a) und eine daran angrenzende stegförmige Ausformung (1b) aufweist, wobei der Sollbruchbereich (1c) in deren Verbindungsbereich angeordnet ist.9. Security element according to one of the preceding claims 1 to 8, characterized in that the carrier ( 1 ) has a surface area ( 1 a) and an adjoining web-shaped shape ( 1 b), the predetermined breaking area ( 1 c) being arranged in their connecting area is. 10. Sicherheitselement nach Anspruch 9, dadurch gekennzeichnet, daß die Wicklung (2) im Flächenbereich (1a) und der Miniaturschaltkreis (3) im Stegbereich (1b) angeordnet sind.10. Security element according to claim 9, characterized in that the winding ( 2 ) in the surface area ( 1 a) and the miniature circuit ( 3 ) in the web area ( 1 b) are arranged. 11. Sicherheitselement nach einem der vorhergehenden Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Träger (1) mindestens zwei, jeweils durch einen Sollbruchstellenbereich voneinander getrennte Flächenbereiche aufweist.11. Security element according to one of the preceding claims 1 to 8, characterized in that the carrier ( 1 ) has at least two surface areas, each separated by a predetermined breaking point area. 12. Sicherheitselement nach Anspruch 2, dadurch gekennzeichnet, daß die elektrische Wicklung ein auf einem Kern, insbesondere einem Ferritkern, angeordneter Solenoid ist.12. Security element according to claim 2, characterized in that the electrical winding one on a core, in particular a ferrite core, arranged solenoid. 13. Sicherheitselement nach Anspruch 12, dadurch gekennzeichnet, daß der Kern des Solenoids innerhalb des Sollschwächungsbereichs angeordnet ist.13. Security element according to claim 12, characterized in that the Core of the solenoid within the target weakening range is arranged.
DE19720747A 1996-05-24 1997-05-17 Security element containing a transponder Expired - Lifetime DE19720747C2 (en)

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