EP0919050B1 - Element antivol electronique - Google Patents

Element antivol electronique Download PDF

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Publication number
EP0919050B1
EP0919050B1 EP97940042A EP97940042A EP0919050B1 EP 0919050 B1 EP0919050 B1 EP 0919050B1 EP 97940042 A EP97940042 A EP 97940042A EP 97940042 A EP97940042 A EP 97940042A EP 0919050 B1 EP0919050 B1 EP 0919050B1
Authority
EP
European Patent Office
Prior art keywords
security element
dielectric layer
conductive tracks
selected area
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
EP97940042A
Other languages
German (de)
English (en)
Other versions
EP0919050A1 (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 DE19705723A external-priority patent/DE19705723A1/de
Application filed by Meto International GmbH filed Critical Meto International GmbH
Publication of EP0919050A1 publication Critical patent/EP0919050A1/fr
Application granted granted Critical
Publication of EP0919050B1 publication Critical patent/EP0919050B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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 SYSTEMS, e.g. PERSONAL 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

Definitions

  • the invention relates to a fuse element for the electronic Article security, consisting of at least one spiral conductor track and a capacitor with a intermediate dielectric layer or existing from two spiral conductor tracks, which are at least partially overlapping on both sides of a dielectric layer are arranged ( ⁇ resonant circuit).
  • Resonance resonant circuits which at a predetermined resonance frequency, which is usually 8.2 MHz, to resonance vibrations are encouraged to secure goods common against theft 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 often in the checkout areas placed produce a resonance signal with a larger one Amplitude as it is generated in the surveillance systems.
  • a resonance label is usually in a field strength, which is greater than 1.5 A / m, deactivated.
  • the resonant properties of the resonant circuit i.e. the resonance frequency and / or the "Q" factor is modified so much, that the resonance label is no longer through the surveillance system is detected.
  • the deactivated resonant circuit can be mechanically Manipulation, for example by kinking, packing and Transporting the goods or by bending the label and thus the resonant circuit, unintentionally again be reactivated.
  • An unintentional reactivation of one Resonant circuit which is based on a lawfully acquired Item attached, can then trigger an alarm perform what is quite a nuisance to both the buyer and also represents for the department store.
  • US Pat. No. 5,187,466 also describes a method for Generation of a deactivatable resonant circuit by means of a short circuit which, under normal circumstances cannot be destroyed.
  • a Patent family that goes in this direction includes the EP 0 181 327 Bl, U.S. Patent 4,567,473 and U.S. Patent 4,498,076.
  • the invention described in these patents The resonance label is composed as follows: Carrier material that serves as a dielectric, capacitor plates on both sides of the planar, dielectric Substrate, a deactivation zone and a resonant circuit, which is arranged on the dielectric.
  • Carrier material that serves as a dielectric
  • capacitor plates on both sides of the planar, dielectric Substrate a deactivation zone
  • a resonant circuit which is arranged on the dielectric.
  • the invention has for its object a resonant circuit with a reduced probability of reactivation to propose.
  • the dielectric layer essentially a uniform thickness and no additional manufacturing defects (e.g. air pockets) having.
  • the selected one Area lies at the outer ends of the conductor tracks.
  • the highest induction voltage occurs.
  • An advantageous embodiment of the invention Fuse element suggests the dielectric layer in to make the selected area thinner than in the remaining areas.
  • the selected area is thereby excellent that the dielectric layer here is another has chemical or physical properties as in the remaining areas.
  • Fuse element consists of the dielectric layer from at least two components.
  • the melting point of one component the dielectric layer above the manufacturing temperature for securing elements is particularly favorable.
  • the components of the dielectric Layer are such that they can either by Coating or by lamination.
  • Security element is the selected area, in the deactivation takes place through the application reinforced with additional pressure.
  • the formation of the weakened zones can do this take place that the width of the conductor track is narrowed.
  • a another possibility is that the adhesive layer in these weakened zones is treated in such a way that the Binding between the spiral conductor tracks considerably is reduced. It is also possible to trace the tracks in to perforate the weakened zones.
  • Resonant circuit designed so that the capacity between the upper and lower conductor tracks at the inner ends the coils are concentrated.
  • An advantageous development of the invention Device suggests that the overlap areas between the two conductor tracks and thus the capacity between the traces at the inner ends of the Concentrate conductor tracks.
  • 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.
  • An advantage of this topology is that deactivation in the overlap area between the outer ones Ends of the upper and lower trace takes place as this the point with the highest voltage potential between the Conductor tracks is.
  • the deactivation point is therefore very safe in the selected area.
  • 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.
  • Deactivation of the resonant circuit 6 done by shorting between the two spiral Conductor tracks 2, 3, which are preferably made of aluminum are manufactured, through the dielectric layer 4 is produced.
  • An applied alternating magnetic field, like it e.g. is emitted by the monitoring system AC voltages in the two spiral conductor tracks 2, 3 of the resonant circuit 6.
  • the spiral Conductor tracks 2, 3 at least partially overlap and are in opposite directions wrapped.
  • the exterior End of the lower coil 2 has a positive potential relative to inner end of the lower coil 2 when the inner end the upper coil 3 has a positive potential with respect to the has the outer end of the upper coil 3. So it stays to note 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.
  • the upper coil 3 Since in the example shown in 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 of a resonant circuit 6, according to an advantageous development of the resonant circuit 6 according to the invention used can be.
  • the dielectric layer 4 breaks open these local vulnerabilities together, although the potential for tension here is lower than at the ends of the top Coil 2 and lower coil 3. Since the voltage potential at the local vulnerabilities is less than at the ends of the Conductor tracks 2, 3 are those for generating the deactivation short circuit available electrical energy less than the electrical energy needed to generate one Deactivation short circuit at the ends of the upper coil 3 would be necessary.
  • Fig. 5 shows a cross section through a dielectric Layer with manufacturing defects, here air bubbles 7 and Irregularities in the surface.
  • the dielectric layer is to avoid manufacturing defects 4 trained according to a further training that they in essentially has a uniform thickness and large Part is free from local vulnerabilities 7.
  • Such uniform dielectric layer 4 provides a Deactivation in the end areas of the spiral Conductor tracks 2, 3 safe, since here the induced voltage and Energy are maximum. A short circuit caused by a such deactivation arises, is very robust and little susceptible to inadvertent 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, which allows her to serve as a hot melt adhesive and the two coils 2, 3 during the hot stamping of the upper coil 2 onto the lower one Glue coil 3.
  • the upper component 4a of the dielectric Layer 4 melts during hot stamping of the top coil 2.
  • the lower component 4b of the dielectric layer 4 has a 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.
  • Fig. 6 shows a cross section through a resonant circuit 6 with a dielectric layer 4 consisting of two Components 4a, 4b.
  • the lower component 4b can either by coating the lower coil 3 or by Laminating the lower component 4b of the dielectric Layer 4 are produced on the coil 3.
  • the coil material (A1) in the form of wide Roll material before, so that the uniformity of the surface the dielectric layer 4 can be maintained and other defects, for example, by Air pockets 7 are caused to be minimized.
  • the resonant circuit 6 is local in the Area of the ends of the upper coil 2 or in the area of prepared area reinforced.
  • the reinforced zone 10 is less prone to shear and glide or a Delaminate.
  • everyone can Strain on the resonant circuit 6 by buckling or Bends are reduced because the two are spiral Conductor tracks 2, 3 only nearby, but not within the locally reinforced zone 10 shear, slide, kink or delaminate.
  • Resonant circuit 6 are the areas around the ends one of the two conductor tracks 2, 3, here the upper one Conductor 2, reinforced by the fact that a local zone 10 with an additional pressure is applied, the metal, preferably aluminum, is shaped so that it is a non-plane Takes shape.
  • the local pressurization causes better adhesion between the two conductor tracks 2, 3 and between the lower conductor track 3 and the dielectric layer 4. Is this pressure by means of a shaping tool 11 with a survey with a preset profile (stamp 12), the Traces 2,3 are shaped so that the resistance of the Resonant circuit 6 significantly against reactivation is improved.
  • the tool 11 can also be flat be formed and have predetermined dimensions.
  • Fig. 7 shows a plan view of an embodiment of a reinforced zone 10 at one end of the upper conductor track 2.
  • Fig. 8a is a cross section and in Fig. 8b is a plan view a tool 11 shown for the manufacture of the reinforced zone 10 can be used.
  • Training the weakened zone 13 can be done either by the Width of the conductor track 2, 3 is narrowed, as in FIG. 9 and Fig. 10, or by corresponding Treatment of the adhesive layer in this weakened zone 13, in such a way that the bond between the Conductor tracks 2, 3 is considerably weaker here.
  • Another One way to get weakened zones 13 is to to perforate the conductor tracks 2, 3.
  • FIG. 12 The equivalent circuit diagram of this arrangement is shown in FIG. 12 shown.
  • the generated between the two coils 2, 3 Voltage difference is at the outer coil ends is much larger than anywhere else between the coils 2, 3.
  • Figures 11c and 12 also show that the outer turn of the lower conductor track 3 from the upper To a large extent, conductor track 2 is not covered at all becomes.
  • this overlap-free section 9 there is also no deactivation. If you follow them outer turn of the lower conductor track 3 from the end point back where there is a small overlap area with the upper trace 2 there, it is found that the next Point at which there is an overlap of the conductor tracks 2, 3 and thus there is a possibility of deactivation, one piece back on the outer turn of the lower conductor track 3 lies. This point has a much lower one Voltage potential between upper and lower conductor track 2, 3rd
  • Another advantage is that due to the uneven distribution of the potential difference along the Conductor tracks 2, 3 for a deactivation short circuit available energy between the conductor tracks 2, 3 is higher must as with an even distribution of tension and Capacity. However, higher energy means one more reliable short circuit and thus also automatically less risk of unwanted reactivation.

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  • 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)
  • Coils Or Transformers For Communication (AREA)
  • Emergency Protection Circuit Devices (AREA)

Claims (17)

  1. Elément de sécurité pour la protection électronique d'articles, se composant au moins d'une piste conductrice en spirale et d'un condensateur avec une couche diélectrique intercalée ou se composant de deux pistes conductrices en spirale qui sont disposées au moins partiellement en recouvrement des deux côtés d'une couche diélectrique,
    dont la couche diélectrique (4) comporte au moins une zone sélectionnée (8), dans laquelle un court-circuit est généré entre les plaques de condensateur opposées ou les pistes conductrices en spirale (2, 3), à raison d'un apport d'énergie suffisamment élevé par un champ magnétique alternatif,
    et dont la zone sélectionnée (8) est renforcée localement de manière à empêcher une destruction du court-circuit par sollicitation mécanique, et donc une réactivation de l'élément de sécurité (6).
  2. Elément de sécurité selon la revendication 1,
    dont la couche diélectrique (4) présente essentiellement une épaisseur uniforme et n'a pas de défauts supplémentaires à la production.
  3. Elément de sécurité selon la revendication 1 ou 2,
    selon lequel, en cas de deux pistes conductrices en spirale (2, 3), tout au moins partiellement en recouvrement, celles-ci sont bobinées dans des directions opposées, la zone sélectionnée (8) se trouvant placée dans une zone aux extrémités externes des pistes conductrices (2, 3), étant donné que c'est là que se produit la tension d'induction la plus élevée.
  4. Elément de sécurité selon la revendication 1,
    dont la zone sélectionnée (8) se distingue par le fait que la couche diélectrique (4) est ici plus mince que dans les autres zones, ou qu'elle a un trou.
  5. Elément de sécurité selon la revendication 1,
    dont la zone sélectionnée (8) se distingue par le fait que la couche diélectrique (4) présente ici une autre propriété chimique ou physique que dans les autres zones.
  6. Elément de sécurité selon la revendication 1 ou 2,
    dont la couche diélectrique (4) se compose au moins de deux composants (4a, 4b).
  7. Elément de sécurité selon la revendication 6,
    dont l'un des composants (4a; 4b) de la couche diélectrique (4) présente un point de fusion supérieur à la température de production pour des éléments de sécurité (6).
  8. Elément de sécurité selon la revendication 3,
    dont les composants de la couche diélectrique (4) sont de nature à pouvoir être fabriqués soit par enduction soit par laminage.
  9. Elément de sécurité selon la revendication 1, 3, 4 ou 5,
    selon lequel le renforcement dans la zone renforcée (10) est obtenu par l'application d'une pression supplémentaire afin d'améliorer l'adhérence entre les plaques de condensateur ou entre les pistes conductrices au moins partiellement en recouvrement (2, 3).
  10. Elément de sécurité selon la revendication 9,
    dont la zone renforcée (10) est obtenue par moulage sous pression des plaques de condensateur ou des pistes conductrices au moins partiellement en recouvrement (2, 3) en forme tridimensionnelle.
  11. Elément de sécurité selon la revendication 9 ou 10,
    selon lequel l'adhérence améliorée et le moulage des plaques de condensateur ou des pistes conductrices (2, 3) sont obtenus en une seule opération.
  12. Elément de sécurité selon la revendication 1, 3, 4 ou 5,
    selon lequel des zones faiblement formées (13) sont prévues de deux côtés ou de l'autre côté de la zone sélectionnée (8).
  13. Elément de sécurité selon la revendication 12,
    dont les zones faiblement formées (13) sont formées par rétrécissement de la largeur de la piste conductrice (2; 3).
  14. Elément de sécurité selon la revendication 12 ou 13,
    dont la couche diélectrique (4) est dans les zones faiblement formées (13) moins fortement reliée avec les plaques de condensateur ou les pistes conductrices (2, 3) que dans les autres zones.
  15. Elément de sécurité selon la revendication 12 ou 13,
    dont les zones faiblement formées (13) se distinguent par le fait que les plaques de condensateur ou les pistes conductrices (2, 3) sont ici perforées.
  16. Elément de sécurité selon la revendication 2,
    dont les zones se recouvrant entre les deux pistes conductrices (2, 3) et donc la capacité entre les pistes conductrices (2, 3) se concentrent aux extrémités internes des pistes conductrices (2, 3).
  17. Elément de sécurité selon la revendication 16,
    dont les extrémités externes des deux pistes conductrices (2, 3) se recouvrent dans une petite zone, et une zone relativement longue, exempte de recouvrement (9), est adjacente aux extrémités externes des pistes conductrices (2, 3).
EP97940042A 1996-08-06 1997-07-29 Element antivol electronique Expired - Lifetime EP0919050B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19631775 1996-08-06
DE19631775 1996-08-06
DE19705723A DE19705723A1 (de) 1996-08-06 1997-02-14 Sicherungselement für die elektronische Artikelsicherung
DE19705723 1997-02-14
PCT/EP1997/004116 WO1998006075A1 (fr) 1996-08-06 1997-07-29 Element antivol electronique

Publications (2)

Publication Number Publication Date
EP0919050A1 EP0919050A1 (fr) 1999-06-02
EP0919050B1 true EP0919050B1 (fr) 2000-03-22

Family

ID=26028183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97940042A Expired - Lifetime EP0919050B1 (fr) 1996-08-06 1997-07-29 Element antivol electronique

Country Status (10)

Country Link
US (1) US6262663B1 (fr)
EP (1) EP0919050B1 (fr)
JP (1) JP3634382B2 (fr)
AT (1) ATE191095T1 (fr)
AU (1) AU4203397A (fr)
CA (1) CA2262573C (fr)
ES (1) ES2147456T3 (fr)
NO (1) NO313066B1 (fr)
PT (1) PT919050E (fr)
WO (1) WO1998006075A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108806155A (zh) * 2018-06-29 2018-11-13 仁怀市云侠网络科技有限公司 基于物联网的安防监控方法

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US6775839B1 (en) 2002-03-15 2004-08-10 O'brien Patrick J. Optical storage device with print layer surface feature
JP2003317052A (ja) * 2002-04-24 2003-11-07 Smart Card:Kk Ｉｃタグシステム
US7221275B2 (en) * 2002-09-03 2007-05-22 Massachusetts Institute Of Technology Tuneable wireless tags using spatially inhomogeneous structures
US7355516B2 (en) * 2004-12-23 2008-04-08 Checkpoint Systems, Inc. Method and apparatus for protecting culinary products
WO2007130147A2 (fr) * 2005-11-04 2007-11-15 Gerald Giasson Système de capteur de sécurité
US8125341B2 (en) * 2007-12-10 2012-02-28 Checkpoint Systems, Inc. Resonant tag with reinforced deactivation dimple
WO2010066955A1 (fr) 2008-12-11 2010-06-17 Yves Eray Circuit d'antenne rfid

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967161A (en) 1972-06-14 1976-06-29 Lichtblau G J A multi-frequency resonant tag circuit for use with an electronic security system having improved noise discrimination
US4498076A (en) 1982-05-10 1985-02-05 Lichtblau G J Resonant tag and deactivator for use in an electronic security system
US4876555B1 (en) * 1987-03-17 1995-07-25 Actron Entwicklungs Ag Resonance label and method for its fabrication
DK0458923T3 (da) 1989-12-20 1995-05-08 Actron Entwicklungs Ag Deaktiverbar resonansetikette
CH682957A5 (de) 1991-04-16 1993-12-15 Kobe Properties Ltd Verfahren zur Deaktivierung einer Resonanz-Etikette.
NL9202067A (nl) 1992-11-27 1994-06-16 Dutch A & A Trading Bv Detectielabel.
US5510770A (en) 1994-03-30 1996-04-23 Checkpoint Systems, Inc. Surface deactivateable tag
EP0755036A1 (fr) 1995-07-20 1997-01-22 Esselte Meto International GmbH Etiquette à résonance déactivable et procédé de sa fabrication

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108806155A (zh) * 2018-06-29 2018-11-13 仁怀市云侠网络科技有限公司 基于物联网的安防监控方法
CN108806155B (zh) * 2018-06-29 2020-02-11 仁怀市云侠网络科技有限公司 基于物联网的安防监控方法

Also Published As

Publication number Publication date
ATE191095T1 (de) 2000-04-15
NO990517D0 (no) 1999-02-04
CA2262573A1 (fr) 1998-02-12
EP0919050A1 (fr) 1999-06-02
WO1998006075A1 (fr) 1998-02-12
PT919050E (pt) 2000-08-31
AU4203397A (en) 1998-02-25
US6262663B1 (en) 2001-07-17
CA2262573C (fr) 2002-04-16
JP3634382B2 (ja) 2005-03-30
JP2001504604A (ja) 2001-04-03
NO313066B1 (no) 2002-08-05
NO990517L (no) 1999-02-04
ES2147456T3 (es) 2000-09-01

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