EP0919049B1 - Circuit a resonance pour element antivol electronique - Google Patents

Circuit a resonance pour element antivol electronique Download PDF

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Publication number
EP0919049B1
EP0919049B1 EP97936674A EP97936674A EP0919049B1 EP 0919049 B1 EP0919049 B1 EP 0919049B1 EP 97936674 A EP97936674 A EP 97936674A EP 97936674 A EP97936674 A EP 97936674A EP 0919049 B1 EP0919049 B1 EP 0919049B1
Authority
EP
European Patent Office
Prior art keywords
resonant circuit
dielectric layer
conductive tracks
selected area
coils
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
EP97936674A
Other languages
German (de)
English (en)
Other versions
EP0919049A1 (fr
Inventor
Richard Altwasser
Peter Lendering
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
Priority claimed from DE19705722A external-priority patent/DE19705722A1/de
Application filed by Meto International GmbH filed Critical Meto International GmbH
Publication of EP0919049A1 publication Critical patent/EP0919049A1/fr
Application granted granted Critical
Publication of EP0919049B1 publication Critical patent/EP0919049B1/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
    • 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
    • G08B13/2437—Tag layered structure, processes for making layered 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
    • G08B13/2428—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 resonant circuit for the electronic article surveillance.
  • Resonance resonant circuits which at a predetermined resonance frequency, which is usually 8.2 MHz, to resonance vibrations are excited for the purpose of General anti-theft protection in department stores. They are often an integral part of adhesive labels or Cardboard hang tags attached to the items to be secured are attached.
  • the department store is with one electronic surveillance system in the exit area equipped that recognizes the resonant circuits and one Alarm triggers when a secured item is in an unauthorized manner Way a secured surveillance zone happens. Once a Customer has paid for the goods, the resonant circuit deactivated. The measure prevents a Alarm is triggered as soon as an item is lawfully purchased has been passed and subsequently the surveillance zone.
  • the deactivation systems that are often placed in the checkout area are generating a resonance signal with a larger one Amplitude as it is generated in the surveillance systems.
  • a resonance label is usually accompanied by a signal whose field strength is greater than 1.5 A / m, deactivated.
  • EP 0 181 327 B1 describes a deactivable device Resonance label described, which results from a dielectric carrier layer, capacitor plates to both Sides of the dielectric layer and a spiral Turn on either side of the dielectric Layer.
  • a selected area prepared for deactivation a selected area prepared for deactivation.
  • the dielectric layer is thinner here than in the other areas.
  • the invention has for its object a resonant circuit propose that be reliably disabled can.
  • the object is achieved in that the resonant circuit from two spiral conductor tracks and one dielectric layer, the two conductor tracks are wound in opposite directions and to both Sides of the dielectric layer are arranged such that they overlap at least partially, with at least one selected area is provided in which a conductive Path between the two conductor tracks is created as soon as one sufficiently high energy through an external alternating field is fed.
  • the invention therefore has no separate ones Capacitor plates on; rather, these are directly through the two at least partially overlapping Conductor tracks formed.
  • Resonant circuit has the dielectric Layer essentially a uniform thickness and none additional manufacturing defects (e.g. air pockets).
  • This configuration is particularly advantageous in connection with the training that the selected area to the outer end regions of the conductor tracks, where the Induction voltage of the conductor tracks is maximum.
  • the selected area to the outer end regions of the conductor tracks, where the Induction voltage of the conductor tracks is maximum.
  • any place of the To prepare the resonant circuit in particular.
  • the deactivation area lies in the use of physical laws automatically in a predeterminable range the outer ends of the spiral traces.
  • Resonant circuit suggests that the selected one Area at any point of the overlapping Conductor tracks lie and are prepared in such a way that when they are created of the deactivation signal the conductive path on the prepared site.
  • the dielectric layer is thinner in the selected area than in the other areas or that it is prepared location around a hole in the dielectric layer acts.
  • Resonant circuit provides that the dielectric Another physical layer in the selected area or chemical in nature.
  • the dielectric Layer consists of at least two components.
  • the dielectric Layer consists of at least two components.
  • the melting point of one component above the manufacturing temperature for the Resonant circuits i.e. this layer is during of the manufacturing process does not melt.
  • the components are furthermore according to a further training of the Obtain the resonant circuit so that it can either by Coating or lamination can be put together.
  • Another improvement in terms of a safe Deactivation can also be achieved in that the outer ends of the two traces in a small one Area overlap and that is at the outer ends of the Conductors a relatively long area without overlap connects.
  • Fig. 1 shows an embodiment of the invention Resonant circuit 6 in plan view. 2 is the in Fig. 1 shown resonant circuit 6 in cross section see.
  • the resonant circuit 6 is deactivated by a short circuit between the two spiral Conductor tracks 2, 3, which are preferably made of aluminum are generated through the dielectric layer 4 becomes.
  • An applied alternating magnetic field e.g. is emitted by the monitoring system AC voltages in the two spiral conductor tracks 2, 3 of the resonant circuit 6.
  • the two spiral Conductor tracks 2, 3, which at least partially overlap, are wrapped in opposite directions. Therefore points the outer end of the lower coil 2 has a positive potential relative to the inner end of the lower coil 2 if that inner end of the upper coil 3 has a positive potential with respect to the outer end of the upper coil 3. It stays So it should be noted that the points / areas in which the induced alternating voltages between the two coils 2, 3 are maximum, located in the end regions of the coils 2, 3.
  • FIG. 1 the upper coil 3 has fewer turns than the lower coil 2, the highest voltages between the ends of the upper coil 3 and the positions directly below the lower coil 2 generated.
  • Fig. 3 illustrates the voltage relationships in different areas of the two themselves at least partially overlapping coils 2, 3 one Resonant circuit 6, according to an advantageous Further development of the resonant circuit 6 according to the invention can be used.
  • Fig. 3 shows the different voltages in different Areas of the two overlapping coils 2, 3 over their length during the electromagnetic Induction occur.
  • the dielectric layer 4 is not uniform is thick or contains air bubbles 7, which is due to Manufacturing errors is quite possible Deactivation in different areas of coils 2, 3 occur. Such manufacturing defects can be local Cause vulnerabilities and even holes through Air pockets in the dielectric layer 4 cause. As a result, the dielectric layer 4 breaks thereon local vulnerabilities together, though that Voltage potential here is lower than at the ends of upper coil 2 and lower coil 3. Because the voltage potential is lower at the local weak points than at the ends of the conductor tracks 2, 3, is used to generate the Deactivation short circuit available electrical energy less than the electrical energy that to create a deactivation short at the ends the upper coil 3 would be necessary.
  • Fig. 5 shows a cross section of a one layer existing dielectric 4 with manufacturing defects, here Air bubbles 7 and irregularities in the area Surface.
  • a dielectric layer which is essentially a has uniform thickness and is largely free of local vulnerabilities that arise as a result of manufacturing.
  • Such a uniform dielectric layer 4 provides one Deactivation in places where maximum Voltage and energy can be found, i.e., related to that Example shown at the ends of the upper conductor track 2. Short circuits caused by such deactivation are very robust and not very susceptible to unintentional reactivation.
  • the resonant circuit 6 consists of the dielectric layer 4 from at least two components 4a, 4b, an upper one Component 4a and a lower component 4b.
  • the lower one Component 4b is stamped onto the lower coil 3 applied.
  • the upper component 4a is on the upper coil 2 applied.
  • the upper component has 4a a relatively low melting point that allows her to Serve hot melt adhesive and the two coils 2, 3 during hot stamping the upper coil 2 towards the lower coil 3 glue.
  • the upper component 4a of the dielectric layer 4 melts during hot stamping of the upper coil 2.
  • Die lower component 4b of the dielectric layer 4 has one higher melting point and does not melt during the Hot stamping on the top spool 2.
  • the uniformity of the lower component 4b of the dielectric layer 4 which is not melts, improves the uniformity in the thickness of the dielectric layer 4 overall.
  • the 6 shows a cross section of a resonant circuit 6 with a dielectric layer 4 consisting of two components 4a, 4b.
  • the lower component 4b can either be coated the lower coil 3 or by laminating the lower one Component 4b of the dielectric layer 4 on the coil 3 getting produced.
  • the coil material is usually located (A1) in the form of wide roll material, so that the Uniformity of the surface of the dielectric layer 4 can be maintained and other flaws that for example caused by air pockets 7, be minimized.

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)
  • Filters And Equalizers (AREA)

Claims (11)

  1. Circuit résonnant (6) pour la protection électronique d'articles, comportant deux pistes conductrices en spirale (bobines 2, 3) et une couche diélectrique (4), dont les deux pistes conductrices en spirale (2, 3) sont bobinées dans des sens opposés et disposées des deux côtés de la couche diélectrique (4) de telle manière qu'il y ait du moins partiellement recouvrement, au moins une zone sélectionnée étant prévue dans laquelle se forme un flux conducteur entre les deux pistes conductrices en spirale (2, 3), dès qu'une énergie suffisamment élevée est appliquée par un champ alternatif externe.
  2. Circuit résonnant selon la revendication 1, dont la couche diélectrique (4) présente essentiellement une épaisseur uniforme et n'a pas de défauts supplémentaires à la production (par exemple, des inclusions d'air (7)).
  3. Circuit résonnant selon la revendication 1 et 2,
    dont la zone sélectionnée se trouve dans les zones d'extrémité externes des bobines (2, 3), pour lesquelles la tension d'induction des bobines (2, 3) / pistes conductrices, est maximale.
  4. Circuit résonnant selon la revendication 1, dont la zone sélectionnée (8) se trouve à un point quelconque des bobines en recouvrement (2, 3) et est préparée de telle manière qu'en cas d'application du signal de désactivation, le flux conducteur soit mis en place dans la zone sélectionnée (9).
  5. Circuit résonnant selon la revendication 4, dont la couche diélectrique (4) est plus mince sur le point sélectionné que dans les autres zones ou la zone sélectionnée (8) est un trou dans la couche diélectrique (4).
  6. Circuit résonnant selon la revendication 4, dont la couche diélectrique (4) présente dans la zone sélectionnée une autre propriété physique ou chimique.
  7. Circuit résonnant selon la revendication 1 ou 2,
    dont la couche diélectrique (4) se compose au moins de deux composants (4a, 4b).
  8. Circuit résonnant selon la revendication 1 ou 7,
    dont le point de fusion de l'un des composants (4a ; 4b) est supérieur à la température de production pour les circuits résonnants (6).
  9. Circuit résonnant selon la revendication 7 ou 8,
    dont les composants (4a, 4b) sont de nature à pouvoir être assemblés ensemble soit par enduction soit par laminage.
  10. Elément de sécurité selon la revendication 2, dont les zones de recouvrement entre les deux pistes conductrices en spirale (2, 3) et donc la capacité entre les pistes conductrices en spirale (2, 3), se concentrent aux extrémités internes des pistes conductrices en spirale (2, 3).
  11. Circuit résonnant selon la revendication 10, dont les extrémités externes des deux pistes conductrices en spirale (2, 3) se recouvrent sur une petite zone, et une zone relativement longue, exempte de recouvrement, est adjacente aux extrémités externes des pistes conductrices (2, 3).
EP97936674A 1996-08-06 1997-07-29 Circuit a resonance pour element antivol electronique Expired - Lifetime EP0919049B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19631775 1996-08-06
DE19631775 1996-08-06
DE19705722A DE19705722A1 (de) 1996-08-06 1997-02-14 Resonanzschwingkreis für die elektronische Artikelsicherung
DE19705722 1997-02-14
PCT/EP1997/004113 WO1998006074A1 (fr) 1996-08-06 1997-07-29 Circuit a resonance pour element antivol electronique

Publications (2)

Publication Number Publication Date
EP0919049A1 EP0919049A1 (fr) 1999-06-02
EP0919049B1 true EP0919049B1 (fr) 2000-03-29

Family

ID=26028182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97936674A Expired - Lifetime EP0919049B1 (fr) 1996-08-06 1997-07-29 Circuit a resonance pour element antivol electronique

Country Status (11)

Country Link
US (1) US6169482B1 (fr)
EP (1) EP0919049B1 (fr)
JP (1) JP3974659B2 (fr)
AT (1) ATE191288T1 (fr)
AU (1) AU3941897A (fr)
CA (1) CA2262585C (fr)
DK (1) DK0919049T3 (fr)
ES (1) ES2147017T3 (fr)
NO (1) NO313065B1 (fr)
PT (1) PT919049E (fr)
WO (1) WO1998006074A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19905886A1 (de) * 1999-02-11 2000-08-17 Meto International Gmbh Identifizierungselement und Verfahren zur Herstellung eines Identifizierungselements
JP3390389B2 (ja) * 1999-12-08 2003-03-24 チェックポイント・マニュファクチュアリング・ジャパン株式会社 共振タグ
US6400271B1 (en) * 2000-03-20 2002-06-04 Checkpoint Systems, Inc. Activate/deactiveable security tag with enhanced electronic protection for use with an electronic security system
FR2832530B1 (fr) * 2001-11-22 2004-08-20 Nojim Procede de fabrication d'une etiquette a circuits de resonance
JP2005280287A (ja) * 2004-03-31 2005-10-13 Tokai Aluminum Foil Co Ltd 共振ラベル用積層材の製造法
JP2006301827A (ja) * 2005-04-19 2006-11-02 Aruze Corp 非接触ｉｃカードシステム、並びに非接触ｉｃカードの取付体
US20070164865A1 (en) * 2005-11-04 2007-07-19 Gerald Giasson Security sensor system
US20080191883A1 (en) * 2007-02-12 2008-08-14 Checkpoint Systems, Inc. Resonant tag
US7812734B2 (en) * 2007-12-20 2010-10-12 Ken Hardin Alarm system employing existing conductive aspect of copper lines as well as optional pressure switch sensor for triggering a copper theft event

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5285191A (en) * 1981-10-30 1994-02-08 Reeb Max E LC marker construction useful as an electromagnetically interrogatable transponder means
US4498076A (en) * 1982-05-10 1985-02-05 Lichtblau G J Resonant tag and deactivator for use in an electronic security system
DE3221500A1 (de) 1982-06-07 1983-12-08 Max-E. Dipl.-Ing. 7320 Göppingen Reeb Identifizierungsanordnung in form eines an einem gegenstand anbringbaren gebildes und verfahren zur herstellung
NL8700388A (nl) 1987-02-17 1988-09-16 Nedap Nv Flexibele identificatielabel.
US4876555B1 (en) * 1987-03-17 1995-07-25 Actron Entwicklungs Ag Resonance label and method for its fabrication
CH680823A5 (fr) 1990-08-17 1992-11-13 Kobe Properties Ltd
CH682957A5 (de) 1991-04-16 1993-12-15 Kobe Properties Ltd Verfahren zur Deaktivierung einer Resonanz-Etikette.
US5241299A (en) 1991-05-22 1993-08-31 Checkpoint Systems, Inc. Stabilized resonant tag circuit
DE69522214T2 (de) 1995-07-17 2002-05-08 Checkpoint Manufacturing Japan Co.,Ltd. Resonanzetikett und Verfahren zu seiner Herstellung

Also Published As

Publication number Publication date
EP0919049A1 (fr) 1999-06-02
AU3941897A (en) 1998-02-25
NO990516D0 (no) 1999-02-04
NO313065B1 (no) 2002-08-05
JP2001507141A (ja) 2001-05-29
PT919049E (pt) 2000-09-29
US6169482B1 (en) 2001-01-02
DK0919049T3 (da) 2000-08-28
ATE191288T1 (de) 2000-04-15
CA2262585A1 (fr) 1998-02-12
CA2262585C (fr) 2002-02-26
JP3974659B2 (ja) 2007-09-12
WO1998006074A1 (fr) 1998-02-12
NO990516L (no) 1999-02-04
ES2147017T3 (es) 2000-08-16

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