EP0949598A2 - Element für die elektronische Artikelsicherung - Google Patents
Element für die elektronische Artikelsicherung Download PDFInfo
- Publication number
- EP0949598A2 EP0949598A2 EP99104717A EP99104717A EP0949598A2 EP 0949598 A2 EP0949598 A2 EP 0949598A2 EP 99104717 A EP99104717 A EP 99104717A EP 99104717 A EP99104717 A EP 99104717A EP 0949598 A2 EP0949598 A2 EP 0949598A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- barkhausen
- sections
- soft magnetic
- magnetic material
- length
- 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
- 239000000463 material Substances 0.000 claims abstract description 53
- 239000000696 magnetic material Substances 0.000 claims abstract description 41
- 238000005516 engineering process Methods 0.000 claims abstract description 12
- 230000005415 magnetization Effects 0.000 claims abstract description 6
- 230000035699 permeability Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
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
- G08B13/2408—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 ferromagnetic 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
- G08B13/2437—Tag layered structure, processes for making layered tags
Definitions
- the invention relates to an element for electronic article surveillance or for the sensor technology, consisting of a strip-shaped or wire-shaped Barkhausen material of length L, which is in an external magnetic Alternating field is excited to emit a characteristic signal, and a soft magnetic material that the Barkhausen material assigned.
- Barkhausen material - also called pulse wires - are both for electronic article surveillance as well as for so-called pulse wire sensors in sensor technology. They are characterized by an almost rectangular Hysteresis curve, i.e. the magnetic reversal in an external magnetic Alternating field occurs almost suddenly, as soon as the field of excitation has reached the predetermined threshold.
- suitable elements are described, for example, in US 4,247,601 US 4,660,025, EP 0 309 679 B1 and EP 0 762 354 A1.
- the sudden magnetic reversal of wire-shaped or strip-shaped Barkhausen materials in an external alternating field is the result of one pronounced uniaxial anisotropy along the longitudinal axis of the wire or the strip.
- This anisotropy suppresses bothersome Turning processes during the magnetic reversal process as well as the formation of terminating domain structures before reaching the panel strength - would but the formation of appropriate structures to round off the Hysteresis curve and thus a deterioration in the switching characteristics to lead.
- an amorphous band or an amorphous wire made of Barkhausen material as a security element for the to use electronic article surveillance.
- the amorphous material at least one further strip of soft magnetic Material associated with which is preferably the ends of the amorphous Material towers.
- the invention has for its object a cost-effective element for to propose electronic article surveillance or for sensor technology, the does not have the aforementioned disadvantages.
- the object is achieved in that the soft magnetic material individual sections of a predetermined length, which in one predetermined distance from each other, and that the sections the soft magnetic material with respect to the Barkhausen material are positioned that the magnetic stray fields generated by them with the Coupling magnetization of the Barkhausen material.
- the stray field coupling stabilizes the biased causes wire-like or strip-like Barkhausen material.
- the stray field coupling stabilizes the biased causes wire-like or strip-like Barkhausen material.
- the corresponding securing elements can be used as continuous straps manufacture. From the tapes, labels can then be created for each Use case length are punched out.
- the sections of the soft magnetic material To couple the sections of the soft magnetic material with the To optimize Barkhausen material, the sections of the arrange soft magnetic material on the Barkhausen material.
- the sections of the soft magnetic material and the Barkhausen material have essentially the same width. Will continue suggested that the sections of the soft magnetic material in the essentially evenly distributed over the length of the Barkhausen material are.
- the invention For use as pulse wires in sensors, the invention has Element the advantage that the ends are not covered. This will make it possible, the distance between the actual sensor and the field source to keep low. Especially with such sensors, but increasingly Dimensions also for elements for electronic article surveillance (especially for small articles) is an embodiment of the invention Switching element to be regarded as particularly favorable, in which - as already mentioned - The length of the strip-shaped or wire-shaped Barkhausen material is chosen relatively low. By coordinating the length, the distance and the permeability of the sections of the soft magnetic material can be the characteristic signal of the element for the respective length of the Optimize Barkhausen material. So it enables the invention Solution, the length of known from the prior art Shorten Barkhausen elements by about half without the Panel strength increase dramatically. This inevitably leads to considerable Material savings, which is why the securing elements according to the invention are relatively inexpensive. This is also supported by the previous ones described simple and inexpensive methods of manufacturing.
- an advantageous training suggests that sections a semi-hard or hard magnetic material are provided, which in immediate vicinity of the Barkhausen material and the sections of the soft magnetic Material are arranged.
- An embodiment of an element according to the invention that can be deactivated before that the sections of soft magnetic material and the sections of the semi-hard or hard magnetic material along the length of the Barkhausen material are arranged alternately in succession.
- the sections of the soft magnetic material and the sections of the semi-hard or hard magnetic material and the Barkhausen material in have essentially the same width.
- Fig. 1 shows a schematic representation of the switching behavior of known Barkhausen elements of various lengths in the M-H diagram. While the Hysteresis curve of the longer Barkhausen element - characterized by (I) - runs almost rectangular and thus when the respective one is reached Switching field strengths suddenly magnetized, shows the shorter one Barkhausen element - characterized by (II) - a hysteresis curve on the deviates significantly from the desired rectangular shape. Magnetic reversal no longer occurs suddenly at a given field strength of the external magnetic field H, but continuously while the external Magnetic field passes through a certain area.
- the magnetization in the Barkhausen elements is from the saturated State coming in field H1, when field strength H2 is reached in the lower one Represented area of the drawing. While in the case of the longer one Barkhausen element the magnetization of the edge areas negligible is small, it occurs in the shorter Barkhausen element due to the increased demagnetization effect well before reaching the actual panel strength Hs. The consequence of this is that the Magnetization process of the shorter element is much less sudden runs as that of the longer element. This makes the detection probability in electronic article surveillance systems based on the Generation of higher harmonics of the fundamental frequency of the query field based, drastically reduced.
- FIG. 2 is an perspective view of an embodiment of the invention Elements for electronic article surveillance or for sensor technology shown.
- Fig. 3 shows the embodiment in plan view.
- sections 3 of a soft magnetic material of length a arranged on a strip-shaped Barkhausen material 2 b sections 3 of a soft magnetic material of length a arranged.
- the solution according to the invention is due to stray field couplings stabilization of the prestressed Barkhausen material 2 reached.
- the length a and the Distance b of the sections 3 of the soft magnetic material can do that Switching behavior also decided relatively short Barkhausen elements 1 can be improved without an undesirable increase in intrinsic panel strength would be necessary.
- an intrinsic switching field strength is the switching field strength of an "infinitely" long Barkhausen element designated.
- FIG Fig. 4 A deactivatable embodiment of the element 1 according to the invention is shown in FIG Fig. 4 can be seen in cross section.
- On the strip-shaped Barkhausen material 2 are at a distance b from each other sections 3 of length a made of soft magnetic Material arranged.
- sections 4 of a semi-hard or hard magnetic material are arranged. Sections 4 are used in a known manner to deactivate the Fuse element 1. Is such a high on the fuse element 1 Magnetic field applied that the sections 4 of the semi-hard or hard magnetic Materials are driven to saturation, so they prevent subsequently a reaction of the Barkhausen material 2 to the outside magnetic query field H.
- Fig. 5 shows a schematic representation of the switching behavior of the Elements 1 according to the invention for electronic article surveillance or for the sensor technology. While the strip or wire Barkhausen material 2 taken by itself the already mentioned several times has a rectangular hysteresis curve, the hysteresis curve has Sections 3 of the soft magnetic material have a typically sheared shape.
- the solution according to the invention is characterized in that a strip-like or wire-like Barkhausen material 2 of short length L is used. Without those arranged on the Barkhausen material 2 Sections 3 of the soft magnetic material would change the hysteresis curve into Fig. 1 shown rounded shape (hysteresis curve II).
- Barkhausen material 2 becomes prestressed Barkhausen material 2 stabilized due to stray field coupling. That also has the short Barkhausen element 1 shows a rectangular hysteresis curve and consequently shows the desired switching behavior when applying an external magnetic Alternating field H.
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)
Abstract
Description
Claims (8)
- Element für die elektronische Artikelsicherung oder für die Sensortechnik, bestehend aus einem streifenförmigen oder drahtförmigen Barkhausenmaterial der Länge L, das in einem externen magnetischen Wechselfeld zur Aussendung eines charakteristischen Signals angeregt wird, und einem weichmagnetischen Material, das dem Barkhausenmaterial zugeordnet ist,
dadurch gekennzeichnet,daß das weichmagnetische Material aus einzelnen Abschnitten (3) einer vorgegebenen Länge (a) besteht, die in einem vorgegebenen Abstand (b) voneinander angeordnet sind, unddaß die Abschnitte (3) des weichmagnetischen Materials bezüglich des Barkhausenmaterials (2) derart positioniert sind, daß die von ihnen erzeugten magnetischen Streufelder mit der Magnetisierung (M) des Barkhausenmaterials (2) koppeln. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Abschnitte (3) des weichmagnetischen Materials auf dem Barkhausenmaterial (2) angeordnet sind. - Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Abschnitte (3) des weichmagnetischen Materials und das Barkhausenmaterial (2) im wesentlichen die gleiche Breite haben. - Vorrichtung nach Anspruch 1, 2 oder 3
dadurch gekennzeichnet,
daß die Abschnitte (3) des weichmagnetischen Materials im wesentlichen gleichmäßig über die Länge (L) des Barkhausenmaterials (2) verteilt sind. - Vorrichtung nach Anspruch 1 oder 4,
dadurch gekennzeichnet,
daß die Länge L des Barkhausenmaterials (2) so gering wie möglich gewählt ist und daß durch Abstimmung der Länge (a), des Abstandes (b) und der Permeabilität (P) der Abschnitte (3) des weichmagnetischen Materials das charakteristische Signal des Elements (1) für die jeweilige Länge (L) des Barkhausenmaterials (2) optimiert ist. - Vorrichtung nach Anspruch 1 oder 5,
dadurch gekennzeichnet,
daß Abschnitte (4) eines halbhart- oder hartmagnetischen Materials vorgesehen sind, die in unmittelbarer Nähe des Barkhausenmaterials (2) und der Abschnitte (3) des weichmagnetischen Materials angeordnet sind. - Vorrichtung nach Anspruch 1 oder 6,
dadurch gekennzeichnet,
daß die Abschnitte (3) des weichmagnetischen Materials und die Abschnitte (4) des halbhart- oder hartmagnetischen Materials entlang der Länge (L) des Barkhausenmaterials (2) abwechselnd aufeinander folgend angeordnet sind. - Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Abschnitte (3) des weichmagnetischen Materials und die Abschnitte (4) des halbhart- oder hartmagnetischen Materials und das Barkhausenmaterial (2) im wesentlichen dieselbe Breite haben.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19815583 | 1998-04-08 | ||
| DE19815583A DE19815583A1 (de) | 1998-04-08 | 1998-04-08 | Element für die elektronische Artikelsicherung oder für die Sensortechnik |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0949598A2 true EP0949598A2 (de) | 1999-10-13 |
| EP0949598A3 EP0949598A3 (de) | 2000-11-22 |
| EP0949598B1 EP0949598B1 (de) | 2003-12-03 |
Family
ID=7863889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99104717A Expired - Lifetime EP0949598B1 (de) | 1998-04-08 | 1999-03-10 | Element für die elektronische Artikelsicherung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6259368B1 (de) |
| EP (1) | EP0949598B1 (de) |
| JP (1) | JP4159697B2 (de) |
| DE (2) | DE19815583A1 (de) |
| DK (1) | DK0949598T3 (de) |
| ES (1) | ES2212404T3 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8244632B2 (en) | 2001-10-26 | 2012-08-14 | First Data Corporation | Automated transfer with stored value |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6690279B1 (en) * | 1998-07-22 | 2004-02-10 | Meto International Gmbh | Security element for the electronic surveillance of articles |
| DE19958466A1 (de) * | 1999-12-04 | 2001-06-07 | Meto International Gmbh | Vorrichtung und Verfahren zum Anzeigen des Zustands von EM- oder AM-Sicherungsetiketten |
| EP1258538B1 (de) * | 2000-07-17 | 2006-10-11 | NHK Spring Co., Ltd. | Magnetischer markierer und seine herstellung |
| ES2268964B1 (es) * | 2005-04-21 | 2008-04-16 | Micromag 2000, S.L. | "etiqueta magnetica activable/desactivable basada en microhilo magnetico y metodo de obtencion de la misma". |
| RU2292588C1 (ru) * | 2005-07-12 | 2007-01-27 | Бетелин Владимир Борисович | Устройство для идентификации и способ его опроса |
| KR101419263B1 (ko) * | 2008-04-18 | 2014-07-16 | 메트글라스, 인코포레이티드 | 원격 온도 센싱 장치와 그에 따른 원격 온도 센싱 방법 |
| EP2269017A4 (de) * | 2008-04-18 | 2013-09-25 | Metglas Inc | Temperatursensor und diesbezügliches ferntemperaturerfassungsverfahren |
| DE102009043462A1 (de) * | 2009-09-30 | 2011-03-31 | Vacuumschmelze Gmbh & Co. Kg | Magnetischer Streifen, Sensor aufweisend einen magnetischen Streifen und Verfahren zur Herstellung eines magnetischen Streifens |
| JP2014171044A (ja) * | 2013-03-01 | 2014-09-18 | Yokohama National Univ | 電気パルス発生装置、及び電気パルス発生装方法 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1234891A (en) * | 1983-10-20 | 1988-04-05 | 746278 Ontario Limited D/B/A I.D. Systems Canada | Security system label |
| GB8713353D0 (en) * | 1987-06-08 | 1987-07-15 | Scient Generics Ltd | Magnetic article surveillance systems |
| US4829288A (en) * | 1987-11-30 | 1989-05-09 | Minnesota Mining And Manufacturing Company | Economic, multi-directionally responsive marker for use in electronic article surveillance systems |
| US4882569A (en) * | 1988-07-26 | 1989-11-21 | Security Tag Systems, Inc. | Deactivatable fequency-dividing-transponder tag |
| JPH08186019A (ja) * | 1994-11-02 | 1996-07-16 | Unitika Ltd | 磁気マーカ |
| US5554974A (en) * | 1994-11-23 | 1996-09-10 | International Business Machines Corporation | Encodable tag with radio frequency readout |
| US5519379A (en) * | 1995-04-10 | 1996-05-21 | Sensormatic Electronics Corporation | Multi-thread re-entrant marker with simultaneous switching |
| DE19533362A1 (de) * | 1995-09-09 | 1997-03-13 | Vacuumschmelze Gmbh | Längsgestreckter Körper als Sicherungsetikett für elektromagnetische Diebstahlsicherungssysteme |
| CA2189827A1 (en) * | 1995-11-08 | 1997-05-09 | Tatsuya Matsumoto | Antitheft label |
| DE19604746A1 (de) * | 1996-02-09 | 1997-08-14 | Esselte Meto Int Gmbh | Sicherungselement für die elektronische Artikelsicherung |
| US5835016A (en) * | 1997-12-15 | 1998-11-10 | Sensormatic Electronics Corporation | Multi-thread re-entrant marker with transverse anisotropy flux concentrators |
| US6023226A (en) * | 1998-01-29 | 2000-02-08 | Sensormatic Electronics Corporation | EAS marker with flux concentrators having magnetic anisotropy oriented transversely to length of active element |
-
1998
- 1998-04-08 DE DE19815583A patent/DE19815583A1/de not_active Withdrawn
-
1999
- 1999-03-10 ES ES99104717T patent/ES2212404T3/es not_active Expired - Lifetime
- 1999-03-10 DE DE59907905T patent/DE59907905D1/de not_active Expired - Fee Related
- 1999-03-10 EP EP99104717A patent/EP0949598B1/de not_active Expired - Lifetime
- 1999-03-10 DK DK99104717T patent/DK0949598T3/da active
- 1999-04-07 JP JP09964999A patent/JP4159697B2/ja not_active Expired - Fee Related
- 1999-04-08 US US09/288,102 patent/US6259368B1/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8244632B2 (en) | 2001-10-26 | 2012-08-14 | First Data Corporation | Automated transfer with stored value |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0949598A3 (de) | 2000-11-22 |
| ES2212404T3 (es) | 2004-07-16 |
| US6259368B1 (en) | 2001-07-10 |
| JPH11328549A (ja) | 1999-11-30 |
| DE59907905D1 (de) | 2004-01-15 |
| EP0949598B1 (de) | 2003-12-03 |
| DE19815583A1 (de) | 1999-10-14 |
| JP4159697B2 (ja) | 2008-10-01 |
| DK0949598T3 (da) | 2004-03-29 |
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