EP1224640A1 - Sicherungselement für die elektronische artikelsicherung - Google Patents
Sicherungselement für die elektronische artikelsicherungInfo
- Publication number
- EP1224640A1 EP1224640A1 EP00969337A EP00969337A EP1224640A1 EP 1224640 A1 EP1224640 A1 EP 1224640A1 EP 00969337 A EP00969337 A EP 00969337A EP 00969337 A EP00969337 A EP 00969337A EP 1224640 A1 EP1224640 A1 EP 1224640A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conductor track
- element according
- contact zone
- fuse element
- dielectric layer
- 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
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
- G08B13/2428—Tag details
- G08B13/2431—Tag circuit details
Definitions
- the invention relates to a securing element for electronic article surveillance, consisting of a lower conductor track and an upper conductor track, the conductor tracks having a contact zone and then each having a turn with a different direction of rotation and the conductor tracks being arranged one above the other and an electrical connection in the area of the contact zone exists between the lower circuit board and the upper circuit board.
- a corresponding securing element has become known, for example, from DE 197 08 180 AI.
- Fuse elements are referred to as resonant resonant circuits or as radio frequency (RF) fuse elements, the resonant frequency being determined by the capacitance C, the inductance L and the resistance R of the resonant circuit.
- RF radio frequency
- Radio frequency security elements in the form of labels or tags are used to prevent and detect theft in department stores and warehouses and are becoming increasingly popular due to the high detection rate.
- the article security itself can be briefly described as follows:
- the radio frequency security elements in the surveillance zone of the area to be secured usually this is the entrance and exit area of the department store or warehouse - are excited by an alternating magnetic field to emit a characteristic detection signal. As soon as the monitoring system registers this detection signal, an alarm is triggered.
- Two pillars of the surveillance system are visible to the visitor of a department store or warehouse, between which anyone who wants to leave the department store or warehouse must pass.
- the spatial distances of the above-mentioned columns, the level of the existing interference and the performance of the RF security element are essential for the detection rate of the monitoring system.
- One way of increasing the detection rate is to increase the dimensions of the security element.
- the disadvantage of this solution is that the costs for the securing element increase and, moreover, goods with small external dimensions can only be provided with such large securing elements with difficulty.
- Another disadvantage of the known RF fuse elements is that the resonance frequency of the fuse elements is detuned by an electrically conductive mass located in the vicinity of the fuse element; ie can be changed. A knowledgeable thief can take advantage of this effect and drastically reduce the detection rate by holding the security element in his hand.
- there are difficulties in detecting security elements of the type described which are attached to products with a high water content, with sufficient certainty. Such products with a high water content are e.g. B. meat, fish or beverage bottles.
- the invention is therefore based on the object of providing a security element which, with the same dimensions as the known security elements, has a better detection rate.
- a securing element for electronic article surveillance consisting of a lower conductor track and an upper one Conductor track, the conductor tracks having a contact zone and then a turn with a different direction of rotation, the conductor tracks being arranged one above the other and in the area of the contact zone there being an electrical connection between the lower circuit board and the upper circuit board, and that of at least one of the two Turns included angle of rotation is less than or equal to 2 ⁇ .
- the effective volume V ⁇ ff [m 3 ] is an important parameter for assessing the performance of an RF security element.
- the effective volume V e ff is defined as the quotient of the magnetic moment which is emitted by the securing element and the field strength H of the magnetic field in which the securing element is located.
- the increase in the effective volume V eff reduces the sensitivity of the monitoring system to interference, it allows the columns to be spaced further apart, or it increases the detection rate of the monitoring system under otherwise identical conditions.
- the effective volume V ef is increased by approximately 20% compared to known RF security elements.
- a dielectric layer is present between the lower conductor track and the upper conductor track, with the exception of the contact zone, so that an electrical connection between the printed circuit boards is reliably prevented at a different location than at the contact zones.
- the configuration of the dielectric layer as an adhesive layer, a dielectric film, in particular made of PET, and / or a dielectric lacquer layer is particularly advantageous, since the electrical connection is prevented in a simple and effective manner.
- One embodiment of the invention provides that the thickness of the dielectric layer is less than or equal to 2 ⁇ m, so that the capacitance of the resonant circuit formed by the printed circuit boards is increased and, in addition, the ability to influence the resonance frequency by electrically conductive masses located in the vicinity of the fuse element is greatly reduced becomes.
- the conductor tracks are electrically closed in the area of the contact zones by punching through them connect, so that the electrical connection is made safely, inexpensively and mechanically highly resilient.
- FIG. 1 a top view of the lower conductor track according to a preferred embodiment of the fuse element according to the invention
- FIG. 2 a top view of the upper conductor track according to a preferred embodiment of the inventive device
- Fig. 1 and Fig. 2 assembled conductor tracks.
- the lower conductor track 1 shows a plan view of a lower conductor track 1.
- the lower conductor track 1 is punched out of an aluminum foil of approximately 38 ⁇ m in thickness.
- the lower interconnect 1 has a contact zone 2, within which there is electrical contact between the lower interconnect 1 and an upper interconnect, not shown in FIG. 1. Starting from the contact zone 2, the lower conductor track 1 is wound counterclockwise. The angle of rotation a enclosed by the turn 2 is less than or equal to 2 ⁇ .
- the upper conductor track 5 shows a plan view of an upper conductor track 5.
- the upper conductor track 5 is also punched out of an aluminum foil and has the same dimensions as the lower conductor track 1.
- the contact zone 2 also present on the upper conductor track 5 provides a when the securing element is assembled electrical connection between lower circuit board 1 and upper circuit board 5.
- the upper conductor track 5 is wound clockwise, the angle of rotation b enclosed by the winding 2 also being less than or equal to 2 ⁇ . In this embodiment, the angles of rotation a and b enclosed by both turns are less than 2 ⁇ .
- the thickness of the lower conductor track 1 and the upper conductor track 5 can deviate upwards or downwards from the above-mentioned 38 ⁇ m.
- the conductor tracks 1 and 5 can be produced in a different way than by punching out. Punching out is inexpensive because the two conductor tracks 1 and 5 are relatively wide and simple.
- a gap 4 is present between the ends of the turns 3 and the contact zones 2.
- the entire lower interconnect 1 is then covered with a dielectric layer. This layer is removed or weakened again in the area of contact zone 2.
- FIG. 3 shows an exemplary embodiment of a fuse element according to the invention, which is composed of the lower and the upper conductor tracks 1 and 5. In the area of the contact zone 2 there is an electrical contact between the two conductor tracks 1 and 5. Otherwise, a dielectric layer (not shown in FIG. 3) arranged between the lower conductor track 1 and the upper conductor track 5 prevents the electrical contact between the conductor tracks 1 and 5.
- the conductor tracks 1 and 5 and the dielectric layer are arranged on a carrier plate 7, which can have external dimensions of typically 40 mm ⁇ 40 mm and ensures the required mechanical stability of the securing element.
- the capacitance C of the fuse element must be increased accordingly. This is done by reducing the thickness of the dielectric layer between lower conductor track 1 and upper conductor track 5.
- the thickness of this layer in a fuse element according to the invention is approximately 2 ⁇ m or less, instead of 3 ⁇ m to 4 ⁇ m in the case of fuse elements according to the prior art.
- Etched RF security elements according to the prior art even have layer thicknesses of 30 ⁇ m to 50 ⁇ m.
- the effective volume V eff is approximately 1.2 L to 1.3 L. In the case of the fuse elements according to the invention, the effective volume V eff is approximately 1 for the same area. 5 L to 1.6 L.
- the increase in the capacitance C also leads to a greater insensitivity of the securing element to detuning, that is to say a change in the resonance frequency.
- Detuning occurs whenever the fuse element is brought into close proximity to a large electrically conductive mass. High dielectric losses occur between this electrically conductive mass and the conductor tracks 1 and 5, which change the resonance frequency of the fuse element and reduce its Q factor. As a result, the effective volume V eff of the securing element also decreases.
- the above-mentioned electrically conductive compound can be the hand or the body of a department store thief, the above-mentioned products or the like with a high water content. his.
- the Q factor can drop from values between 50 and 80 to values between 10 and 30 due to the proximity of a hand.
- the resonance frequency can shift by 10% to 20%.
- the Q factor only drops by approximately 10% due to the proximity of one hand, while the resonance frequency only shifts by approximately 1%. That is, the detection rate of the security element according to the invention cannot be significantly influenced by the hand or another electrically conductive mass. Even if the security element according to the invention is enclosed by two hands, the detection rate remains almost unchanged.
- the securing element according to the invention is also characterized by a high mechanical stability.
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)
- Fuses (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19951561A DE19951561A1 (de) | 1999-10-27 | 1999-10-27 | Sicherungselement für die elektronischen Artikelsicherung |
DE19951561 | 1999-10-27 | ||
PCT/EP2000/009522 WO2001031601A1 (de) | 1999-10-27 | 2000-09-28 | Sicherungselement für die elektronische artikelsicherung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1224640A1 true EP1224640A1 (de) | 2002-07-24 |
EP1224640B1 EP1224640B1 (de) | 2003-08-06 |
Family
ID=7926929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00969337A Expired - Lifetime EP1224640B1 (de) | 1999-10-27 | 2000-09-28 | Sicherungselement für die elektronische artikelsicherung |
Country Status (11)
Country | Link |
---|---|
US (1) | US6987453B1 (de) |
EP (1) | EP1224640B1 (de) |
JP (1) | JP4625221B2 (de) |
AT (1) | ATE246831T1 (de) |
AU (1) | AU777178B2 (de) |
DE (2) | DE19951561A1 (de) |
DK (1) | DK1224640T3 (de) |
ES (1) | ES2203521T3 (de) |
NO (1) | NO20021911L (de) |
NZ (1) | NZ517425A (de) |
WO (1) | WO2001031601A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7355516B2 (en) * | 2004-12-23 | 2008-04-08 | Checkpoint Systems, Inc. | Method and apparatus for protecting culinary products |
US7663489B2 (en) * | 2006-04-28 | 2010-02-16 | Checkpoint Systems, Inc. | Alarm systems, wireless alarm devices, and article security methods |
WO2010066955A1 (fr) | 2008-12-11 | 2010-06-17 | Yves Eray | Circuit d'antenne rfid |
US8586871B2 (en) * | 2011-07-19 | 2013-11-19 | The Charles Stark Draper Laboratory, Inc. | Interconnect schemes, and materials and methods for producing the same |
DE102017207871A1 (de) | 2017-05-10 | 2018-11-15 | Tridonic Gmbh & Co Kg | Firmware-Update-Over-The Air (FOTA) in der Gebäudetechnik |
US11769938B2 (en) * | 2018-06-27 | 2023-09-26 | Avery Dennison Retail Information Services Llc | RFID tags operating in the high frequency band |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4397924A (en) | 1981-06-15 | 1983-08-09 | Duracell Inc. | High temperature solid state storage cell |
DE3143208C2 (de) * | 1981-10-30 | 1984-07-05 | Max-E. Dipl.-Ing. 7320 Göppingen Reeb | Identifizierungsanordnung in Form eines an einem Gegenstand anbringbaren etikettartigen Streifens und Verfahren zu deren Herstellung |
US5291180A (en) * | 1981-10-30 | 1994-03-01 | Reeb Max E | LC structure useful in radio frequency security systems |
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 |
ZA889254B (en) * | 1987-12-10 | 1990-08-29 | Uniscan Ltd | Powering and communication apparatus and method(s) |
NL9202067A (nl) * | 1992-11-27 | 1994-06-16 | Dutch A & A Trading Bv | Detectielabel. |
ATE440480T1 (de) * | 1993-12-30 | 2009-09-15 | Miyake Kk | Verbundfolie mit schaltungsfírmiger metallfolie oder dergleichen und verfahren zur herstellung |
US5838253A (en) * | 1995-05-17 | 1998-11-17 | Accu-Sort Systems, Inc. | Radio frequency identification label |
US5574431A (en) * | 1995-08-29 | 1996-11-12 | Checkpoint Systems, Inc. | Deactivateable security tag |
DE19708180A1 (de) * | 1996-11-04 | 1998-05-07 | Esselte Meto Int Gmbh | Sicherungselement für die elektronische Artikelüberwachung |
NZ334506A (en) * | 1996-11-04 | 2001-02-23 | Meto International Gmbh | Security device for electronic surveillance of articles |
DE19753619A1 (de) * | 1997-10-29 | 1999-05-06 | Meto International Gmbh | Identifizierungselement und Verfahren zu seiner Herstellung |
US6025725A (en) * | 1996-12-05 | 2000-02-15 | Massachusetts Institute Of Technology | Electrically active resonant structures for wireless monitoring and control |
DE19719434A1 (de) * | 1997-05-12 | 1998-11-19 | Meto International Gmbh | Universelles Sicherungselement und Verfahren zu seiner Herstellung |
CN1155924C (zh) * | 1997-08-08 | 2004-06-30 | Sca协调中心公司 | 聚合物射频谐振标签及制造方法 |
FR2771233B1 (fr) * | 1997-11-18 | 2000-01-28 | Sgs Thomson Microelectronics | Bobine d'antenne a champ electrique reduit |
US6147655A (en) * | 1998-11-05 | 2000-11-14 | Single Chip Systems Corporation | Flat loop antenna in a single plane for use in radio frequency identification tags |
US6384727B1 (en) * | 2000-08-02 | 2002-05-07 | Motorola, Inc. | Capacitively powered radio frequency identification device |
US6373387B1 (en) * | 2000-08-08 | 2002-04-16 | Honeywell International Inc. | Integrated hybrid electronic article surveillance marker |
-
1999
- 1999-10-27 DE DE19951561A patent/DE19951561A1/de not_active Withdrawn
-
2000
- 2000-09-28 DK DK00969337T patent/DK1224640T3/da active
- 2000-09-28 JP JP2001534108A patent/JP4625221B2/ja not_active Expired - Fee Related
- 2000-09-28 DE DE50003223T patent/DE50003223D1/de not_active Expired - Lifetime
- 2000-09-28 WO PCT/EP2000/009522 patent/WO2001031601A1/de active IP Right Grant
- 2000-09-28 EP EP00969337A patent/EP1224640B1/de not_active Expired - Lifetime
- 2000-09-28 NZ NZ517425A patent/NZ517425A/xx unknown
- 2000-09-28 AT AT00969337T patent/ATE246831T1/de not_active IP Right Cessation
- 2000-09-28 ES ES00969337T patent/ES2203521T3/es not_active Expired - Lifetime
- 2000-09-28 AU AU79095/00A patent/AU777178B2/en not_active Ceased
-
2002
- 2002-04-23 NO NO20021911A patent/NO20021911L/no not_active Application Discontinuation
- 2002-04-29 US US10/135,083 patent/US6987453B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0131601A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2001031601A1 (de) | 2001-05-03 |
EP1224640B1 (de) | 2003-08-06 |
ES2203521T3 (es) | 2004-04-16 |
AU7909500A (en) | 2001-05-08 |
NO20021911L (no) | 2002-05-14 |
DE19951561A1 (de) | 2001-05-03 |
DE50003223D1 (de) | 2003-09-11 |
ATE246831T1 (de) | 2003-08-15 |
NZ517425A (en) | 2003-01-31 |
DK1224640T3 (da) | 2003-11-24 |
JP4625221B2 (ja) | 2011-02-02 |
US6987453B1 (en) | 2006-01-17 |
US20060007004A1 (en) | 2006-01-12 |
JP2003513381A (ja) | 2003-04-08 |
AU777178B2 (en) | 2004-10-07 |
NO20021911D0 (no) | 2002-04-23 |
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