EP0919050A1 - Element antivol electronique - Google Patents
Element antivol electroniqueInfo
- Publication number
- EP0919050A1 EP0919050A1 EP97940042A EP97940042A EP0919050A1 EP 0919050 A1 EP0919050 A1 EP 0919050A1 EP 97940042 A EP97940042 A EP 97940042A EP 97940042 A EP97940042 A EP 97940042A EP 0919050 A1 EP0919050 A1 EP 0919050A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conductor tracks
- dielectric layer
- element according
- fuse element
- capacitor plates
- 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
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 20
- 230000007420 reactivation Effects 0.000 claims abstract description 14
- 239000004020 conductor Substances 0.000 claims description 75
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 230000007547 defect Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 claims description 2
- 230000006378 damage Effects 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims description 2
- 238000003475 lamination Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 230000001629 suppression Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 34
- 230000009849 deactivation Effects 0.000 description 25
- 238000005452 bending Methods 0.000 description 10
- 238000012544 monitoring process Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 3
- 239000012876 carrier material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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
Definitions
- the invention relates to a fuse element for the electronic type kels sherung, consisting of at least one spiral conductor track and a capacitor with an intermediate dielectric layer or consisting of two spiral conductor tracks, which are arranged at least partially overlapping on both sides of a dielectric layer ⁇ -> Resonant circuit).
- Resonant circuits which are excited to resonate at a predetermined resonance frequency, which is usually 8.2 MHz, are generally used to secure goods against theft in department stores. They are often an integral part of adhesive labels or hanging labels made of cardboard that are attached to the items to be secured.
- the department store is equipped with an electronic monitoring system in the exit area, which detects the resonant resonant circuits and triggers an alarm if a secured article passes through a secured monitoring zone in an unauthorized manner. Once a If the customer has paid for the goods, the resonant circuit is deactivated. The measure prevents an alarm from being triggered as soon as an item has been legally purchased and subsequently passes through the surveillance zone.
- the deactivation systems which are often placed in the checkout areas, generate a resonance signal with a greater amplitude than is generated in the monitoring systems.
- a resonance label is usually deactivated in a field strength greater than 1.5 A / m.
- Different deactivation mechanisms for resonant resonant circuits have become known. Either the insulation between mutually opposite conductor tracks is destroyed, which leads to a short circuit, or a piece of conductor track is overloaded and melts, causing an interruption.
- the resonant properties of the resonant circuit i.e. the resonance frequency and / or the "Q" factor are modified so strongly that the resonance label is no longer detected by the monitoring system.
- the deactivated resonant circuit can be unintentionally reactivated by mechanical manipulation, for example by kinking, packing and transporting the goods or by bending the label and thus the resonant circuit. Unintentional reactivation of a resonant circuit attached to a legally purchased item can then trigger an alarm, which is quite a nuisance for both the buyer and the department store.
- US Pat. No. 5,187,466 also describes a method for generating a deactivatable resonant circuit by means of a short circuit, which cannot be destroyed under normal circumstances.
- the resonant circuit disclosed therein has capacitor plates which are arranged on both sides of the dielectric.
- the dielectric layer lying between the two capacitor plates has a through hole.
- the object of the invention is to propose a resonant circuit with a reduced probability of reactivation.
- the object is achieved in that at least one selected area (a desired breakdown point) is provided in the dielectric layer, in which a short circuit between the opposite capacitor plates or the spiral conductor tracks is created with a correspondingly high energy supply by an alternating magnetic field, and wherein the selected area is locally reinforced so that destruction of the short circuit Path) is prevented by mechanical stress and thus reactivation of the securing element.
- a selected area a desired breakdown point
- the dielectric layer has essentially a uniform thickness and no additional manufacturing defects (e.g. air closures).
- An advantageous embodiment of the fuse element according to the invention proposes that the dielectric layer in train the selected area thinner than in the remaining areas.
- the selected area is distinguished by the fact that the dielectric layer here has a different chemical or physical nature than in the remaining areas.
- the dielectric layer consists of at least two components.
- the melting point of one component of the dielectric layer is above the manufacturing temperature for fuse elements.
- the components of the dielectric layer are designed in such a way that they are produced either by coating or by lamination.
- the selected area in which the deactivation takes place is reinforced by the application of additional pressure.
- Printing together improves the adhesion between the capacitor plates or the at least partially overlapping conductor tracks. It has proven to be advantageous if the reinforcement is achieved in a three-dimensional form by pressure molding the capacitor plates or the at least partially overlapping conductor tracks. It is particularly advantageous here if the improved adhesion and the shaping of the capacitor plates or the conductor tracks are achieved in one operation.
- weakened zones are provided on both sides of the reinforced zone. If a bending moment attacks from the outside, the probability that the resonant circuit in the area of the weakened zones will bend or even break is much greater than a bending or breaking within the reinforced zone.
- the weakened zone can therefore also be referred to as the preferred bending or breaking zone.
- the weakened zones can be formed by narrowing the width of the conductor track. Another possibility is that the adhesive layer in these weakened zones is treated in such a way that the bond between the spiral conductor tracks is considerably reduced. It is also possible to perforate the conductor tracks in the weakened zones.
- the resonant circuit is designed such that the capacitance between the upper and lower conductor tracks is concentrated at the inner ends of the coils.
- a large overlap area of the conductor tracks is provided at the inner ends of the coils, which results in a correspondingly large capacitance, while the overlap at the outer coil ends is very small.
- An advantageous development of the device according to the invention proposes that the overlap regions between the two conductor tracks and thus the capacitance between the conductor tracks concentrate at the inner ends of the conductor tracks.
- the outer ends of the two conductor tracks overlap in a small area and that the outer ends of the conductor tracks are followed by a relatively long area without overlap.
- An advantage of this topology is that the deactivation takes place in the overlap area between the outer ends of the upper and lower conductor tracks, since this is the point with the highest voltage potential between the conductor tracks.
- the deactivation point is therefore located with a high degree of certainty in the selected area.
- FIG. 8b a top view of the tool shown in FIG. 8a
- 9 a plan view of a conductor track with a weakened zone
- FIG. 12 an equivalent circuit diagram for the voltage conditions of the embodiment of the resonant circuit according to the invention shown in FIG. 11c.
- Fig. 1 shows an embodiment of the resonant circuit 6 according to the invention in plan view.
- the resonant circuit 6 shown in FIG. 1 can be seen in cross section.
- the resonant circuit 6 is deactivated by creating a short circuit between the two spiral conductor tracks 2, 3, which are preferably made of aluminum, through the dielectric layer 4.
- An applied alternating magnetic field such as that emitted by the monitoring system, induces alternating voltages in the two spiral conductor tracks 2, 3 of the resonant circuit 6.
- the spiral conductor tracks 2, 3 overlap at least partially and are wound in n opposite directions.
- the outer end of the lower coil 2 has a positive potential relative to the inner end of the lower coil 2 when the inner end of the upper coil 3 has a positive potential with respect to the outer end of the upper coil 3. It must therefore be noted that the points / areas in which the induced alternating voltages between the two coils 2, 3 are maximum are in the end areas of the coils 2, 3.
- the upper coil 3 has fewer turns than the lower coil 2 in the example shown in FIG. 1, the highest voltages are generated between the ends of the upper coil 3 and the locations of the lower coil 2 directly below.
- FIG. 3 illustrates the voltage relationships in different areas of the two at least partially overlapping coils 2, 3 of a resonant circuit 6, which can be used according to an advantageous development of the resonant circuit 6 according to the invention.
- the deactivation takes place in the end regions of the upper coil 2 and lower coil 2, since the induced potential is maximum here. Since the electric field strength occurs concentrated on a surface with a small radius, deactivation occurs precisely at the ends of the conductor tracks 2, 3 - as shown in FIG. 4.
- the dielectric layer 4 breaks down at these local weak points, although the voltage potential here is lower than at the ends of the upper coil 2 and lower coil 3. Since the voltage potential at the local weak points is lower than at the ends of the conductor tracks 2, 3, the electrical energy available for generating the deactivation short circuit is smaller than the electrical energy that would be necessary for generating a deactivation short circuit at the ends of the upper coil 3.
- FIG. 5 shows a cross section through a dielectric layer with manufacturing defects, here air bubbles 7 and irregularities in the area of the surface.
- the dielectric layer 4 is designed according to a further development so that it has a substantially uniform thickness and is largely free of local weak points 7.
- Such a uniform dielectric layer 4 represents a deactivation in the end regions of the spiral Conductors 2, 3 are safe, since the induced voltage and energy are maximum here.
- a short circuit caused by such a deactivation is very robust and less susceptible to inadvertent reactivation.
- the dielectric layer 4 consists of at least two components 4a, 4b, an upper component 4a and a lower component 4b.
- the lower component 4b is applied to the lower coil 3 before punching and hot stamping.
- the upper component 4a is applied to the upper coil 2.
- the upper component 4a has a relatively low melting point, which enables it to serve as a hot melt adhesive and to glue the two coils 2, 3 to the lower coil 3 during the hot stamping of the upper coil 2.
- the upper component 4a of the dielectric Layer 4 melts during hot stamping of the upper coil 2.
- the lower component 4b of the dielectric layer 4 has a higher melting point and does not melt during hot stamping onto the upper coil 2.
- the uniformity of the lower component 4b of the dielectric layer 4 which does not melt, improves the uniformity in the thickness of the dielectric layer 4 as a whole.
- the coil material (AI) is usually in the form of a wide roll material, so that the uniformity of the surface of the dielectric layer 4 can be maintained and other defects, which are caused, for example, by air pockets 7, are minimized.
- the reinforced zone 10 is less susceptible to shear and slide movements or a Delaminate. Local reinforcement can reduce the stress on the resonant circuit 6 by kinking or bending, since the two spiral conductor tracks 2, 3 only shear, slide, kink or delaminate in the vicinity, but not within the locally reinforced zone 10.
- the regions around the ends of one of the two conductor tracks 2, 3, here the upper conductor track 2 are reinforced by the fact that an additional pressure is applied to a local zone 10, the metal, preferably aluminum, is shaped so that it takes on a non-planar shape.
- the local application of pressure results in better adhesion between the two conductor tracks 2, 3 and between the lower conductor track 3 and the dielectric layer 4.
- this pressure is applied to a pressure with a predetermined profile (stamp 12) by means of a shaping tool 11 the conductor tracks 2, 3 are shaped such that the resistance of the resonant circuit 6 against reactivation is considerably improved.
- the tool 11 can also be designed flat and have predetermined dimensions.
- a metal sheet with grooves, bulges or other incorporated structures is not as easy to bend as a flat sheet.
- the same principle is used here to create a locally reinforced zone 10. Any large-scale folding or bending of the resonant circuit 6 leads to the resonant circuit 6 being bent, folded, sheared or delaminated in the vicinity but not within the reinforced zone 10. This reduces the risk of unintentional reactivation.
- the actual shape of the reinforced zone 10 is not critical, the actual profile of the molded one Conductor 2, 3 in the reinforced zone 10 is also not critical.
- FIG. 7 shows a top view of an embodiment of a reinforced zone 10 at one end of the upper conductor track 2.
- FIG. 8 a shows a cross section and FIG. 8 b shows a top view of a tool 11 that can be used to produce the reinforced zone 10.
- the weakened zone 13 can be formed either by narrowing the width of the conductor track 2, 3, as shown in FIGS. 9 and 10, or by appropriate treatment of the adhesive layer in this weakened zone 13, specifically in the way that the bond between the conductor tracks 2, 3 is considerably weaker here. Another way to obtain weakened zones 13 is to perforate the conductor tracks 2, 3.
- the conductor tracks 2, 3 and the resonant circuit 6 are like this formed that the capacitance between the upper and lower conductor tracks 2, 3 is concentrated at the inner ends of the spiral conductor tracks 2, 3.
- FIGS. 11a, 11b and 11c show a corresponding resonant circuit 6. From the figures it can be seen that there is a large overlap area of the conductor tracks 2, 3 at the inner ends of the coils 2, 3, which results in a results in proportionally large capacitance, while the overlap at the outer ends of the coils 2, 3 is very small.
- FIG. 11c and 12 The equivalent circuit diagram of this arrangement is shown in FIG.
- the voltage difference generated between the two coils 2, 3 is considerably greater at the outer coil ends than at any other point between the coils 2, 3.
- FIGS. 11c and 12 When looking at FIGS. 11c and 12 together, it can also be seen that the outer The lower conductor track 3 is largely not covered by the upper conductor track 2 at all. Thus, no deactivation can take place along this overlap-free section 9. If you follow the outer turn of the lower conductor track 3 back from the end point, where there is a small overlap area with the upper conductor track 2, it is found that the next point at which there is an overlap of the conductor tracks 2, 3 and thus the possibility of Deactivation exists, a piece back on the outer turn of the lower conductor track 3. This point has a considerably lower voltage potential between the upper and lower conductor tracks 2, 3.
- Carrier material upper coil lower coil dielectric layer a upper component b lower component adhesive layer resonant circuit or fuse element air inclusion (prepared) selected area overlap-free area 0 reinforced zone 1 tool 2 punch 3 weakened zone
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)
- Coils Or Transformers For Communication (AREA)
- Emergency Protection Circuit Devices (AREA)
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19631775 | 1996-08-06 | ||
DE19631775 | 1996-08-06 | ||
DE19705723 | 1997-02-14 | ||
DE19705723A DE19705723A1 (de) | 1996-08-06 | 1997-02-14 | Sicherungselement für die elektronische Artikelsicherung |
PCT/EP1997/004116 WO1998006075A1 (fr) | 1996-08-06 | 1997-07-29 | Element antivol electronique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0919050A1 true EP0919050A1 (fr) | 1999-06-02 |
EP0919050B1 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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1107205A2 (fr) * | 1999-12-08 | 2001-06-13 | Checkpoint Manufacturing Japan Co., Ltd. | Marqueur resonant |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US20070164865A1 (en) * | 2005-11-04 | 2007-07-19 | Gerald Giasson | Security sensor system |
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 |
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 |
Family Cites Families (8)
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 |
DE59008370D1 (de) | 1989-12-20 | 1995-03-09 | Actron Entwicklungs Ag | Deaktivierbare resonanzetikette. |
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 |
-
1997
- 1997-07-29 JP JP50756898A patent/JP3634382B2/ja not_active Expired - Fee Related
- 1997-07-29 CA CA002262573A patent/CA2262573C/fr not_active Expired - Fee Related
- 1997-07-29 AU AU42033/97A patent/AU4203397A/en not_active Abandoned
- 1997-07-29 AT AT97940042T patent/ATE191095T1/de not_active IP Right Cessation
- 1997-07-29 US US09/147,646 patent/US6262663B1/en not_active Expired - Lifetime
- 1997-07-29 PT PT97940042T patent/PT919050E/pt unknown
- 1997-07-29 ES ES97940042T patent/ES2147456T3/es not_active Expired - Lifetime
- 1997-07-29 EP EP97940042A patent/EP0919050B1/fr not_active Expired - Lifetime
- 1997-07-29 WO PCT/EP1997/004116 patent/WO1998006075A1/fr active IP Right Grant
-
1999
- 1999-02-04 NO NO19990517A patent/NO313066B1/no not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9806075A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1107205A2 (fr) * | 1999-12-08 | 2001-06-13 | Checkpoint Manufacturing Japan Co., Ltd. | Marqueur resonant |
EP1107205A3 (fr) * | 1999-12-08 | 2002-07-24 | Checkpoint Manufacturing Japan Co., Ltd. | Marqueur resonant |
Also Published As
Publication number | Publication date |
---|---|
NO990517D0 (no) | 1999-02-04 |
JP2001504604A (ja) | 2001-04-03 |
JP3634382B2 (ja) | 2005-03-30 |
AU4203397A (en) | 1998-02-25 |
EP0919050B1 (fr) | 2000-03-22 |
CA2262573C (fr) | 2002-04-16 |
NO990517L (no) | 1999-02-04 |
WO1998006075A1 (fr) | 1998-02-12 |
ES2147456T3 (es) | 2000-09-01 |
CA2262573A1 (fr) | 1998-02-12 |
PT919050E (pt) | 2000-08-31 |
ATE191095T1 (de) | 2000-04-15 |
NO313066B1 (no) | 2002-08-05 |
US6262663B1 (en) | 2001-07-17 |
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