EP0878785A2 - Elément universel de sécurité et sa méthode de fabrication - Google Patents

Elément universel de sécurité et sa méthode de fabrication Download PDF

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Publication number
EP0878785A2
EP0878785A2 EP98106917A EP98106917A EP0878785A2 EP 0878785 A2 EP0878785 A2 EP 0878785A2 EP 98106917 A EP98106917 A EP 98106917A EP 98106917 A EP98106917 A EP 98106917A EP 0878785 A2 EP0878785 A2 EP 0878785A2
Authority
EP
European Patent Office
Prior art keywords
resonant
resonant circuit
circuits
resonant circuits
articles
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.)
Granted
Application number
EP98106917A
Other languages
German (de)
English (en)
Other versions
EP0878785A3 (fr
EP0878785B1 (fr
Inventor
Richard Altwasser
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.)
Meto International GmbH
Original Assignee
Meto International 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 Meto International GmbH filed Critical Meto International GmbH
Publication of EP0878785A2 publication Critical patent/EP0878785A2/fr
Publication of EP0878785A3 publication Critical patent/EP0878785A3/fr
Application granted granted Critical
Publication of EP0878785B1 publication Critical patent/EP0878785B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • G08B13/2428—Tag details
    • G08B13/2448—Tag with at least dual detection means, e.g. combined inductive and ferromagnetic tags, dual frequencies within a single technology, tampering detection or signalling means on the tag

Definitions

  • the invention relates to a universal element for Securing items against theft, at least one has electromagnetic resonant circuit which in Query field of an article monitoring device for Is emitted a characteristic signal, which subsequently triggers an alarm, as well as a Method of manufacturing the universal securing element.
  • Resonant circuits with resonance frequencies (RF) in the mega hertz range are increasingly becoming electronic Article security used.
  • the main area of application is Retail trade. They are usually in the form of Tags and labels provided and machine or manually connected to the items to be backed up.
  • so-called source integration is becoming increasingly common to use, i.e. the securing element is already during the manufacturing or packaging process in the Article or integrated into its packaging.
  • An RF security element is already known from EP 0 665 705 A2 known that consists of two conductive, spiral turns (spirals). The two Spirals are separated by a dielectric layer separated and arranged so that they are at least partially overlap.
  • Such resonance frequency fuse elements are highly flexible. Since they are also very thin and flat, they can be easily printed with the desired imprint in printers. This imprint either serves the customer information or it is machine-readable information, preferably a barcode. Barcodes are a cost-effective solution when it comes to providing machine-readable information. However, it is disadvantageous that a barcode is always brought in the immediate vicinity of the barcode reader based on optical principles in order to be able to be identified. Furthermore, the barcode reader can only decrypt the information if the barcode is freely accessible, i.e. not covered. The use of a source-integrated security element with a barcode will therefore only make sense - if at all - in exceptional cases.
  • the invention is based, an inexpensive task universal securing element and a method to propose for its manufacture.
  • the task is related to the universal securing element solved in that at least one more electromagnetic resonant circuit is provided, the specific, encoded information about the item includes.
  • This encoded information is about a Remote query available and 'readable'. Remote inquiry takes place e.g. by means of a broadband query field that the Resonance frequencies in the universal fuse element contained resonant circuits. It is easy to see that the storage capacity of the universal securing elements on the number of additional resonant circuits is determined.
  • the resonance frequency of the at least one further electromagnetic Resonant circuit outside of Resonance frequency of the resonant circuit for the electronic article surveillance is standardized and lies for one Variety of surveillance systems at 8.2 MHz.
  • a favorable embodiment of the invention universal securing element is that a Resonant circuit made of two winding conductor tracks composed, at least partially overlapping are arranged on both sides of a dielectric layer.
  • universal securing element In order to increase the storage capacity of the invention universal securing element is proposed that a Element that has essentially the same dimensions as the universal security element, with information-bearing Resonance resonant circuits is equipped. This additional element comes with the universal element connected, e.g. it is glued to the back.
  • the task becomes solved that on a carrier at least one more electromagnetic resonant circuit is applied, the specific, encoded information about the item includes.
  • the procedure is essentially that identical resonant circuits for the identification of Articles are used, the resonant circuits subsequently encoded with the specific information will.
  • Possible configurations for the subsequent coding of the Resonant circuits are based on a change in characteristic properties of the resonant circuits. These characteristic properties are: the resonance frequency RF or the capacitance K and the inductance L, which directly determine the resonance frequency Resonance amplitude A (RF) and / or the quality Q of the Resonant circuit.
  • RF resonance frequency
  • One or more of these sizes Resonant circuits for the identification of articles are determined by physical action in a defined manner and changed way.
  • One possibility for coding the resonant resonant circuits provides that selected resonant resonant circuits are short-circuited.
  • the short circuit occurs between opposite conductor tracks through the dielectric layer.
  • the methods that can be used to generate the short circuit are identical to the methods that have already become known in connection with the deactivation of resonant circuits for securing articles.
  • a common method is to pierce the resonant circuit at a selected point with a needle-shaped, possibly heated pin. It is also possible to bring opposing conductor tracks into contact with one another by applying pressure and / or heat.
  • a short circuit can also be achieved in that an arc discharge between two opposite conductive areas of the resonant circuit is achieved by applying a correspondingly strong electric field.
  • the electric field for generating the short circuit is either provided via contact electrodes, or it is generated without contact by applying a sufficiently strong energy pulse in the region of its resonance frequency to the selected resonant circuit.
  • conductive metal of the conductor tracks diffuses into the dielectric layer, so that a permanently conductive connection is created between the coils.
  • the Resonant circuits to identify the articles be encoded by the length of the traces of the Resonance resonant circuits is reduced or enlarged.
  • a simple method of reducing the length of the Conductor tracks provides that of the one to be encoded Resonant circuit part (open circuit) with a cutting device is separated.
  • the Conductor of the resonant circuit to be coded one Melt connection introduced. This melts as a result of Temperature increase as soon as the current that flows through it exceeds a predetermined value. Again, the Current in the resonant circuit through electrode contact or contactless in the manner described above respectively.
  • An alternative method for coding the resonant circuits provides that the resonant circuits to Identification of the items to be encoded by being selective open resonant circuits (at least one turn) to the Resonant circuits are added. This will make the Changed resonant frequency of the resonant circuits.
  • the turn can be in series or added in parallel.
  • at least an additional turn to a resonant circuit add a variety of different Create resonance frequencies.
  • Another way to change the physical Properties consists in a change in the capacity of the Resonant circuits. This will result in an increase in capacity achieved that the area in which the by the dielectric layer separate conductor tracks of the two Coils overlap, is increased.
  • the resonance frequency is thereby changed that two separate, at least partially overlapping coils shorted to one will.
  • the point at which the short circuit occurs is determined subsequently the resulting resonance frequency of the coded resonant circuit.
  • the amplitude of the resonant circuit is changed in a defined manner for the purpose of coding.
  • This is advantageously done, for example, by connecting the resonant circuit to be coded to a conductor track of the resonant circuit for article security. The latter then takes on the function of an antenna for the resonant circuit to be coded.
  • the resonant circuit to be coded is connected to a turn which acts only as an antenna and the length of which can also be selected such that the amplitude of the resonant frequency is changed in the desired manner.
  • a deliberate change in the physical quality Q of the resonant circuit can, for example, by means of following method can be achieved: short circuits generated between two opposite conductor tracks. There these shorts typically have a higher resistance than the conductive traces have, the goodness of the resonant circuit to be encoded is reduced. So the decisive factor for the change in quality is Change in the resistance of the resonant circuit. This Change can also be achieved as follows: Since the Resistance is inversely proportional to the width of the trace it is sufficient to take appropriate measures to reduce the width to change.
  • Fig. 1 shows a plan view of an embodiment of the universal securing element according to the invention 1. It consists of a resonant circuit 2, which in Query field of an electronic article surveillance for Emission of a characteristic signal is excited and subsequently triggers an alarm.
  • the resonant circuit 2 is arranged in the outer region of the carrier 14 and encloses two further resonant circuits 3, the identification of appropriately secured articles to serve.
  • FIG. 2 is a top view of an arrangement of Resonant circuits 3 for the identification of articles to see.
  • This arrangement is an addition to one universal element 1 according to the invention is intended and used to increase the storage capacity many times over.
  • Fig. 3 shows the typical frequency spectrum of a resonant circuit 2; 3. It is characterized in that the Amplitude A (F) and thus the intensity of the signal pronounced maximum (peak) in the area around the resonance frequency (RF) owns.
  • the quality of a resonant circuit 2; 3 is defined as the quotient of the resonance frequency RF and 3 dB bandwidth.
  • FIGS. 4a to 4c show various possibilities of how a resonant circuit 3 is permanently short-circuited (FIG. 4a to 4c) and how the circuit can be interrupted.
  • the short circuit - shown in FIGS. 4a to 4c - takes place through the dielectric layer 13.
  • the resonant circuit 3 is pierced in at least one area of opposite conductor tracks 4, 5 by means of a needle-shaped pin 6.
  • An alternative provides (Fig. 4b) that the upper conductor track 4 is pressed against the lower conductor track 5 by means of a specially shaped pressing tool 7. In order to achieve complete removal of the dielectric layer 13, the pressing tool 7 is additionally heated.
  • a short circuit can occur also - as indicated in Fig. 4c - by means of a electrical arc discharge through the dielectric layer 13 done through.
  • A is required for this correspondingly strong energy impulse in the area of Resonance frequency of the resonant circuit.
  • This Energy pulse can either be by means of contact electrodes be provided, or it is provided by a transmitter in the form of electromagnetic radiation emitted. Diffuse as a result of the arc discharge Particle of the conductive material - usually will aluminum is used in the dielectric layer and carbonate them.
  • FIG. 4d Another possibility for deactivating and thus changing the information content of a resonant circuit is to interrupt the conductor tracks 4, 5. According to one embodiment, this is done mechanically - see FIG. 4d - by means of a cutting device 10. According to an alternative solution, a fusible link (fuse) is built into the conductor track 4, 5, which melts and evaporates when the current flow is sufficiently high due to the heating.
  • 5a shows a schematic illustration of a special embodiment of the element according to the invention, in which a conductor track is attached in series. In FIG. 5b, the conductor track is added in parallel, while FIG. 5c describes the case in which a conductor track which is in the opposite direction to the conductor track 4; 5 is wound, is added serially. With these configurations, the resonance frequency of the resonance resonant circuits 3 can be changed in a defined manner.
  • a change in the resonant frequency of a resonant circuit 3 can also be achieved in that the Capacity K of the resonant circuit is increased or decreased.
  • the capacitance K increased by adding a conductor track section 16 is, the conductor track section 16 is placed so that he an area of the lower conductor track 4 or the upper Conductor 5 of the resonant circuit 3 is opposite.
  • Trace section 16 and trace 4; 5 are about one Junction 12 connected to each other.
  • Fig. 7 shows a schematic representation of a Resonant circuit 3, in which the resonance frequency is changed in that two overlapping coils 4; 5 by short circuit at one of the connection points 12 in a Coil are transformed. The resulting resonance frequency depends on the location of the connection point 12.
  • a solution is shown schematically, via the specifically influences the amplitude A (RF) of the resonance frequency can be.
  • RF amplitude A
  • 5 of Resonant circuit 3 is an additional turn 17th provided that once they are at the junction 12 with the coil 4; 5 is connected as an antenna for this coil 4; 5 acts.
  • the amplitude signal S changed in a defined manner.
  • resonant circuits 3 with two coils 4, 5 on either side of a dielectric Layer - at least partially overlapping - are arranged.
  • the invention is not based on this Design limited, but it is also without further applicable to resonant circuits which are based on a Side of the dielectric layer 13, a coil and a Capacitor plate and on the other side e.g. just one Have capacitor plate.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Ropes Or Cables (AREA)
  • Metal Rolling (AREA)
EP98106917A 1997-05-12 1998-04-16 Elément universel de sécurité et sa méthode de fabrication Expired - Lifetime EP0878785B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19719434 1997-05-12
DE19719434A DE19719434A1 (de) 1997-05-12 1997-05-12 Universelles Sicherungselement und Verfahren zu seiner Herstellung

Publications (3)

Publication Number Publication Date
EP0878785A2 true EP0878785A2 (fr) 1998-11-18
EP0878785A3 EP0878785A3 (fr) 2000-01-12
EP0878785B1 EP0878785B1 (fr) 2003-12-17

Family

ID=7828987

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98106917A Expired - Lifetime EP0878785B1 (fr) 1997-05-12 1998-04-16 Elément universel de sécurité et sa méthode de fabrication

Country Status (6)

Country Link
US (1) US6104278A (fr)
EP (1) EP0878785B1 (fr)
JP (1) JPH10334356A (fr)
AT (1) ATE256905T1 (fr)
DE (2) DE19719434A1 (fr)
ES (1) ES2212165T3 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19951561A1 (de) * 1999-10-27 2001-05-03 Meto International Gmbh Sicherungselement für die elektronischen Artikelsicherung
FR2812482B1 (fr) * 2000-07-28 2003-01-24 Inside Technologies Dispositif electronique portable comprenant plusieurs circuits integres sans contact
US7501954B1 (en) * 2000-10-11 2009-03-10 Avante International Technology, Inc. Dual circuit RF identification tags
FR2815176B1 (fr) * 2000-10-11 2003-01-10 A S K Antenne spirale d'emission et/ou reception a coupures
US6866752B2 (en) 2001-08-23 2005-03-15 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Method of forming ultra thin film devices by vacuum arc vapor deposition
US7164358B2 (en) * 2004-02-17 2007-01-16 Sensormatic Electronics Corporation Frequency divider with variable capacitance
US7355516B2 (en) * 2004-12-23 2008-04-08 Checkpoint Systems, Inc. Method and apparatus for protecting culinary products
FR2886467B1 (fr) * 2005-05-25 2010-10-22 Oberthur Card Syst Sa Entite electronique a antenne magnetique
US20070164865A1 (en) * 2005-11-04 2007-07-19 Gerald Giasson Security sensor system
US8026818B2 (en) * 2006-12-20 2011-09-27 Checkpoint Systems, Inc. EAS and UHF combination tag
WO2010066955A1 (fr) 2008-12-11 2010-06-17 Yves Eray Circuit d'antenne rfid

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3344782A1 (de) * 1982-12-14 1984-06-14 Shigekazu Tokyo Takeda Kartenfoermiger detektor und eintritt- und austritt-kontrollanlage mit einem derartigen detektor
EP0380426A1 (fr) * 1989-01-25 1990-08-01 Tokai Electronics Co., Ltd. Etiquette de résonance ainsi que procédé pour sa fabrication
GB2246492A (en) * 1990-07-26 1992-01-29 Chikara Shimamura Tag identification system having different resonant frequencies
WO1994010663A1 (fr) * 1992-10-26 1994-05-11 Motorola Inc. Systeme d'etiquetage radioelectrique et etiquettes radioelectriques, et procede
WO1994028523A1 (fr) * 1993-05-27 1994-12-08 Motorola Inc. Systeme d'etiquetage hf ameliore a modalites de decodage multiples
US5446447A (en) * 1994-02-16 1995-08-29 Motorola, Inc. RF tagging system including RF tags with variable frequency resonant circuits
US5510769A (en) * 1993-08-18 1996-04-23 Checkpoint Systems, Inc. Multiple frequency tag
US5604485A (en) * 1993-04-21 1997-02-18 Motorola Inc. RF identification tag configurations and assemblies

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1577920A (en) * 1976-11-01 1980-10-29 Nedap Nv Detection plate for identification systems

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3344782A1 (de) * 1982-12-14 1984-06-14 Shigekazu Tokyo Takeda Kartenfoermiger detektor und eintritt- und austritt-kontrollanlage mit einem derartigen detektor
EP0380426A1 (fr) * 1989-01-25 1990-08-01 Tokai Electronics Co., Ltd. Etiquette de résonance ainsi que procédé pour sa fabrication
GB2246492A (en) * 1990-07-26 1992-01-29 Chikara Shimamura Tag identification system having different resonant frequencies
WO1994010663A1 (fr) * 1992-10-26 1994-05-11 Motorola Inc. Systeme d'etiquetage radioelectrique et etiquettes radioelectriques, et procede
US5604485A (en) * 1993-04-21 1997-02-18 Motorola Inc. RF identification tag configurations and assemblies
WO1994028523A1 (fr) * 1993-05-27 1994-12-08 Motorola Inc. Systeme d'etiquetage hf ameliore a modalites de decodage multiples
US5510769A (en) * 1993-08-18 1996-04-23 Checkpoint Systems, Inc. Multiple frequency tag
US5446447A (en) * 1994-02-16 1995-08-29 Motorola, Inc. RF tagging system including RF tags with variable frequency resonant circuits

Also Published As

Publication number Publication date
ATE256905T1 (de) 2004-01-15
ES2212165T3 (es) 2004-07-16
DE59810437D1 (de) 2004-01-29
EP0878785A3 (fr) 2000-01-12
JPH10334356A (ja) 1998-12-18
US6104278A (en) 2000-08-15
DE19719434A1 (de) 1998-11-19
EP0878785B1 (fr) 2003-12-17

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