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DE69026210D1 - Störsignal-Sperrkreis für elektronisches Artikelüberwachungssystem und Anwendungsverfahren - Google Patents

Störsignal-Sperrkreis für elektronisches Artikelüberwachungssystem und Anwendungsverfahren

Info

Publication number
DE69026210D1
DE69026210D1 DE69026210T DE69026210T DE69026210D1 DE 69026210 D1 DE69026210 D1 DE 69026210D1 DE 69026210 T DE69026210 T DE 69026210T DE 69026210 T DE69026210 T DE 69026210T DE 69026210 D1 DE69026210 D1 DE 69026210D1
Authority
DE
Germany
Prior art keywords
interference signal
application method
surveillance system
blocking circuit
electronic article
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 - Fee Related
Application number
DE69026210T
Other languages
English (en)
Other versions
DE69026210T2 (de
Inventor
Harry E Watkins
Kevin Lynch
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.)
Sensormatic Electronics Corp
Original Assignee
Sensormatic Electronics Corp
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 Sensormatic Electronics Corp filed Critical Sensormatic Electronics Corp
Publication of DE69026210D1 publication Critical patent/DE69026210D1/de
Application granted granted Critical
Publication of DE69026210T2 publication Critical patent/DE69026210T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • G08B13/2408—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
    • G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
    • G08B13/2468—Antenna in system and the related signal processing
    • G08B13/2471—Antenna signal processing by receiver or emitter

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Noise Elimination (AREA)
  • Burglar Alarm Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Mobile Radio Communication Systems (AREA)
DE69026210T 1989-12-07 1990-11-09 Störsignal-Sperrkreis für elektronisches Artikelüberwachungssystem und Anwendungsverfahren Expired - Fee Related DE69026210T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/447,382 US4975681A (en) 1989-12-07 1989-12-07 Interfering signal rejection circuitry and electronic article surveillance system and method employing same

Publications (2)

Publication Number Publication Date
DE69026210D1 true DE69026210D1 (de) 1996-05-02
DE69026210T2 DE69026210T2 (de) 1996-10-10

Family

ID=23776163

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69026210T Expired - Fee Related DE69026210T2 (de) 1989-12-07 1990-11-09 Störsignal-Sperrkreis für elektronisches Artikelüberwachungssystem und Anwendungsverfahren

Country Status (7)

Country Link
US (1) US4975681A (de)
EP (1) EP0431341B1 (de)
JP (1) JPH03195223A (de)
AR (1) AR243291A1 (de)
BR (1) BR9005782A (de)
CA (1) CA2020951C (de)
DE (1) DE69026210T2 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5387900A (en) * 1992-11-19 1995-02-07 Sensormatic Electronics Corporation EAS system with improved processing of antenna signals
US5748086A (en) * 1995-11-14 1998-05-05 Sensormatic Electronics Corporation Electronic article surveillance system with comb filtering and false alarm suppression
US5703565A (en) * 1996-02-23 1997-12-30 Sensormatic Electronics Corporation Transformer coupled switching transmitter for electronic article surveillance system
EP0798681A1 (de) * 1996-03-29 1997-10-01 Sensormatic Electronics Corporation Impuls- Abfragesignal in einem harmonische Frequenzen empfangendes Warenüberwachungssytem
US5699045A (en) * 1996-06-06 1997-12-16 Sensormatic Electronics Corporation Electronic article surveillance system with cancellation of interference signals
US6058374A (en) * 1996-06-20 2000-05-02 Northrop Grumman Corporation Inventorying method and system for monitoring items using tags
DE19644927A1 (de) * 1996-10-29 1998-04-30 Esselte Meto Int Gmbh Vorrichtung zur Überwachung eines elektronischen Sicherungselementes in einer Abfragezone
US5955950A (en) * 1998-07-24 1999-09-21 Checkpoint Systems, Inc. Low noise signal generator for use with an RFID system
US5959531A (en) * 1998-07-24 1999-09-28 Checkpoint Systems, Inc. Optical interface between receiver and tag response signal analyzer in RFID system for detecting low power resonant tags
EP1376445B1 (de) * 1998-07-24 2006-04-19 Checkpoint Systems, Inc. Rauscharmer Signalgenerator zur Verwendung in einem RFID System
US6400273B1 (en) 2000-05-05 2002-06-04 Sensormatic Electronics Corporation EAS system with wide exit coverage and reduced over-range
CA2331116A1 (en) * 2001-01-15 2002-07-15 Chenomx, Inc. Compound identification and quantitation in liquid mixtures -- method and process using an automated nuclear magnetic resonance measurement system

Family Cites Families (5)

* 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
ZA7994B (en) * 1978-01-11 1980-01-30 Tag Radionics Ltd Presence sensing system
US4309697A (en) * 1980-10-02 1982-01-05 Sensormatic Electronics Corporation Magnetic surveillance system with odd-even harmonic and phase discrimination
US4675657A (en) * 1986-03-10 1987-06-23 Controlled Information Corporation Electromagnetic surveillance system with improved signal processing
US4791412A (en) * 1988-01-28 1988-12-13 Controlled Information Corporation Magnetic article surveillance system and method

Also Published As

Publication number Publication date
JPH03195223A (ja) 1991-08-26
EP0431341A3 (en) 1992-04-15
AR243291A1 (es) 1993-07-30
CA2020951C (en) 2000-09-12
US4975681A (en) 1990-12-04
CA2020951A1 (en) 1991-06-08
EP0431341A2 (de) 1991-06-12
DE69026210T2 (de) 1996-10-10
EP0431341B1 (de) 1996-03-27
BR9005782A (pt) 1991-09-24

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: SENSORMATIC ELECTRONICS CORP., BOCA RATON, FLA., U

8339 Ceased/non-payment of the annual fee