EP0844596A2 - Dispositif pour détecter une étiquette électronique dans une zone d'interrogation - Google Patents

Dispositif pour détecter une étiquette électronique dans une zone d'interrogation Download PDF

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Publication number
EP0844596A2
EP0844596A2 EP97118492A EP97118492A EP0844596A2 EP 0844596 A2 EP0844596 A2 EP 0844596A2 EP 97118492 A EP97118492 A EP 97118492A EP 97118492 A EP97118492 A EP 97118492A EP 0844596 A2 EP0844596 A2 EP 0844596A2
Authority
EP
European Patent Office
Prior art keywords
pulse
interference
computing
signal
control unit
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.)
Withdrawn
Application number
EP97118492A
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German (de)
English (en)
Other versions
EP0844596A3 (fr
Inventor
David Stocks
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
Application filed by Meto International GmbH filed Critical Meto International GmbH
Publication of EP0844596A2 publication Critical patent/EP0844596A2/fr
Publication of EP0844596A3 publication Critical patent/EP0844596A3/fr
Withdrawn legal-status Critical Current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
    • G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
    • G08B13/2482—EAS methods, e.g. description of flow chart of the detection procedure

Definitions

  • the invention relates to a device for monitoring of an electronic security element in one Interrogation zone, consisting of a transmission device, the at least one periodic interrogation signal in the interrogation zone sends out, the interrogation signal the security element stimulates to send a detection signal, one Receiving device with at least one receiving channel, the receives the detection signal, and a computing / control unit, the that of the receiving device evaluates received signals and identifies the Security element triggers an alarm.
  • the invention Device is both for monitoring Resonance frequency fuse elements as well Monitoring of electromagnetic security elements suitable.
  • EP 123 586 B proposes to send a field with a frequency F3 in the Hz range to the query zone in addition to two query fields with the frequencies F1 and F2 in the kHz range.
  • the low-frequency interrogation field causes the securing element to be driven from saturation in one direction to saturation in the other direction in time with this field.
  • the detection signal therefore occurs periodically at the frequency of the low-frequency field.
  • Interference pulses i.e. high-frequency signals with a bandwidth, which is larger than that of the detection signal of one Fuse element, are from various sources of interference generated. Examples include pulses from Motors, television monitors or passing trams caused. These interference pulses lead to a Reduction of the sensitivity of the surveillance system for electronic security elements. In addition, you can they also have a false alarm in the electronic Trigger monitoring system. Such a false alarm is Of course, extremely undesirable as he is both the staff as well as confusing or annoying customers.
  • the computing / control unit fixed Specify interference pulse pattern.
  • the latter continues to reduce the Sensitivity of the monitoring device and also poses continues to be a source of danger for a false alarm by the way, the same effect can be seen when filtering the Receiving device is not exactly adjusted or if the Inductance or the Q factor of the receiving coils outside a predetermined tolerance.
  • the invention has for its object a device propose the recognition of articles related to equipped with electronically detectable security elements are improved within a query zone.
  • the object is achieved in that the computing / control unit based on the signals received by each Receiving channels detects interference pulses from the interference pulses in an appropriate signal form for a self-learning process created and the received signals from the determined Interference pulses freed.
  • the computing / control unit determines an interference pulse during an initialization phase as follows: after switching on the transmitting device and receiving device, the received signals are stored over several cycles (the cycle is, for example, based on that in the introduction described monitoring system - specified by the low-frequency query field) and examined for possible interference pulses.
  • the computing / regulating unit then calculates the energy of the interference signal and stores the information obtained.
  • the computing / control unit advantageously subjects the test signals to the following correlation: cr (s) ⁇ i Pulse_nodc (i) r (s + i) .
  • the DC voltage component rdc of the test signals is calculated using the computing / control unit using the following formula: rdc (s) ⁇ i r (s + i) / pulse length .
  • the computing / control unit calculates the energy of the received signals as follows: de (s) ⁇ i (r (s + i) - rdc (s)) 2nd
  • the signal component (s) has its maximum value 1. Values smaller 1 denotes signal forms whose similarity to the interference pulse shape determined during the initialization phase is less.
  • the interference signal from the received signals only then removed if the one determined via the energies Signal component (s) above a predetermined one Threshold. This is advantageously located Threshold at 0.9.
  • Fig. 1 shows a schematic representation of the Device 1 according to the invention for detecting a a securing element 2 provided article in one Query zone 3.
  • Query zone 3 is composed of two in essentially parallel detector gates formed, the transmitter 4 and the Receiving device 5 included. Of course you can both devices 4, 5 also in a detector gate be housed.
  • the control of the monitoring device 1 and the evaluation of the measured values takes place by means of the computing / regulating device 7.
  • FIG. 2 is a block diagram of a monitoring system shown for electromagnetic fuse elements (2).
  • the query signals will electromagnetic fuse element 2, which is essentially made of a metal with non-linear magnetic properties exists to send identification signals in the Cycles of the low-frequency (F3) query field stimulated. A cycle is generated by the low-frequency query field F3 certainly.
  • the received by the receiving device 5 Signals r (s) are amplified (amplifier 11) and over the Analog-digital converter 9 of the computing / control unit 7 for the purpose Evaluation forwarded.
  • FIG. 3 shows a flow diagram of an advantageous program to control the device according to the invention 1.
  • Das Program starts at point 12; at point 13 both the transmitting device 4 and the receiving device 5 activated.
  • the received signals r (s) are as below Program item 14 - over several cycles m stored, where m is an integer.
  • Program item 14 the received signals r (s) after possible interference pulses searched, with one interference pulse pattern for every occurring interference pulse is formed (point 16).
  • Program item 17 will include a copy of the interference pulse pattern subtracted DC voltage component.
  • Program item 18 in which a calculation of the energy se (i) of the individual interference pulses, the initialization phase completed.
  • the actual control program then begins at point 19, which ends at program point 29 and then returns to point 19 in a loop.
  • the DC voltage component of the test signals is calculated using the following formula: rdc (s) ⁇ i r (s + i) / pulse length .
  • the computing / control unit 7 determines the energy de of the test signals according to the following formula: de (s) ⁇ i (r (s + i) - rdc (s)) 2nd
  • the signal portion of the test signals is determined using the following formula: Signal component (s) ⁇ (cr (s)) 2nd / (se (s) ⁇ de (s))
  • the corrected received are received under program item 28 Signals r '(s) on a detection signal of a security element 2 checked. Submit this review positive result, an alarm is generated at program point 29 activated. After the check is complete, that returns Control program back to program item 19 and starts the subsequent monitoring and correction cycle.

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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)
  • Radar Systems Or Details Thereof (AREA)
EP97118492A 1996-11-20 1997-10-24 Dispositif pour détecter une étiquette électronique dans une zone d'interrogation Withdrawn EP0844596A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19647905 1996-11-20
DE19647905A DE19647905A1 (de) 1996-11-20 1996-11-20 Vorrichtung zur Überwachung eines elektronischen Sicherungselementes in einer Abfragezone

Publications (2)

Publication Number Publication Date
EP0844596A2 true EP0844596A2 (fr) 1998-05-27
EP0844596A3 EP0844596A3 (fr) 1999-12-08

Family

ID=7812163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97118492A Withdrawn EP0844596A3 (fr) 1996-11-20 1997-10-24 Dispositif pour détecter une étiquette électronique dans une zone d'interrogation

Country Status (3)

Country Link
US (1) US5969611A (fr)
EP (1) EP0844596A3 (fr)
DE (1) DE19647905A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2157563C1 (ru) * 1999-07-07 2000-10-10 Научно-исследовательский и конструкторский институт радиоэлектронной техники Проводно-волновое средство обнаружения нарушителя
RU2434296C1 (ru) * 2010-03-22 2011-11-20 Общество с ограниченной ответственностью "Научно-производственное предприятие "Старт-7" Способ обнаружения нарушителя с определением направления движения

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7067414B1 (en) * 1999-09-01 2006-06-27 Micron Technology, Inc. Low k interlevel dielectric layer fabrication methods
CN104157113B (zh) * 2014-08-29 2018-03-20 陕西四维衡器科技有限公司 红外车辆分离器故障自诊断实现方法及具有故障自诊断能力的红外车辆分离器
CN121605444A (zh) 2023-08-01 2026-03-03 株式会社安尼塞尔 能够避免周围环境噪声的安全纸检测设备

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4168496A (en) * 1977-10-05 1979-09-18 Lichtblau G J Quasi-stationary noise cancellation system
US4459474A (en) * 1981-05-18 1984-07-10 Walton Charles A Identification system with separation and direction capability and improved noise rejection
US4531117A (en) * 1983-07-05 1985-07-23 Minnesota Mining And Manufacturing Company Variable frequency RF electronic surveillance system
CA1234892A (fr) * 1984-02-16 1988-04-05 Pierre Taillefer Systeme de detection pour etiquettes anti-vol
US4668942A (en) * 1984-11-19 1987-05-26 Progressive Dynamics, Inc. Signal analysis apparatus including recursive filter for electromagnetic surveillance system
US4812822A (en) * 1987-08-31 1989-03-14 Monarch Marking Systems, Inc. Electronic article surveillance system utilizing synchronous integration
US4888579A (en) * 1988-09-16 1989-12-19 Minnesota Mining And Manufacturing Company False alarm minimization and direction determination methods
US4992675A (en) * 1989-03-30 1991-02-12 Motorola, Inc. Adaptive threshold control circuit
US5239459A (en) * 1990-02-05 1993-08-24 General Research Corporation Automated assessment processor for physical security system
US5402520A (en) * 1992-03-06 1995-03-28 Schnitta; Bonnie S. Neural network method and apparatus for retrieving signals embedded in noise and analyzing the retrieved signals
US5349339A (en) * 1992-04-07 1994-09-20 Actron Entwicklungs Ag Apparatus for the detection of labels employing subtraction of background signals
WO1994005080A1 (fr) * 1992-08-11 1994-03-03 Siemens Aktiengesellschaft Architecture neuronale de filtrage non-lineaire adaptatif d'interferences perturbatrices
US5353011A (en) * 1993-01-04 1994-10-04 Checkpoint Systems, Inc. Electronic article security system with digital signal processing and increased detection range
US5627516A (en) * 1994-09-28 1997-05-06 Sensormatic Electronics Corporation Electronic article surveillance input configuration control system employing expert system techniques for dynamic optimization
US5537094A (en) * 1995-01-27 1996-07-16 Sensormatic Electronics Corporation Method and apparatus for detecting an EAS marker using a neural network processing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2157563C1 (ru) * 1999-07-07 2000-10-10 Научно-исследовательский и конструкторский институт радиоэлектронной техники Проводно-волновое средство обнаружения нарушителя
RU2434296C1 (ru) * 2010-03-22 2011-11-20 Общество с ограниченной ответственностью "Научно-производственное предприятие "Старт-7" Способ обнаружения нарушителя с определением направления движения

Also Published As

Publication number Publication date
US5969611A (en) 1999-10-19
EP0844596A3 (fr) 1999-12-08
DE19647905A1 (de) 1998-05-28

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