BR9005782A - Sistema com rejeicoes de sinais de interferencia para processamento de sinais,sistema de vigilancia eletronica de artigos,metodo em ambos sistemas - Google Patents

Sistema com rejeicoes de sinais de interferencia para processamento de sinais,sistema de vigilancia eletronica de artigos,metodo em ambos sistemas

Info

Publication number
BR9005782A
BR9005782A BR909005782A BR9005782A BR9005782A BR 9005782 A BR9005782 A BR 9005782A BR 909005782 A BR909005782 A BR 909005782A BR 9005782 A BR9005782 A BR 9005782A BR 9005782 A BR9005782 A BR 9005782A
Authority
BR
Brazil
Prior art keywords
articles
systems
signal processing
electronic surveillance
interference signal
Prior art date
Application number
BR909005782A
Other languages
English (en)
Inventor
Harry E Watkins
Kevin Lynch
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 BR9005782A publication Critical patent/BR9005782A/pt

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)
  • Mobile Radio Communication Systems (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Radar Systems Or Details Thereof (AREA)
BR909005782A 1989-12-07 1990-11-14 Sistema com rejeicoes de sinais de interferencia para processamento de sinais,sistema de vigilancia eletronica de artigos,metodo em ambos sistemas BR9005782A (pt)

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 (1)

Publication Number Publication Date
BR9005782A true BR9005782A (pt) 1991-09-24

Family

ID=23776163

Family Applications (1)

Application Number Title Priority Date Filing Date
BR909005782A BR9005782A (pt) 1989-12-07 1990-11-14 Sistema com rejeicoes de sinais de interferencia para processamento de sinais,sistema de vigilancia eletronica de artigos,metodo em ambos sistemas

Country Status (7)

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

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 (en) * 1996-03-29 1997-10-01 Sensormatic Electronics Corporation Pulsed interrogation signal in harmonic EAS system
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
CN1135509C (zh) * 1998-07-24 2004-01-21 检查点系统有限公司 用于检测贴有谐振智能标签的物体的射频识别系统
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
EP0431341A2 (en) 1991-06-12
CA2020951C (en) 2000-09-12
JPH03195223A (ja) 1991-08-26
EP0431341B1 (en) 1996-03-27
DE69026210T2 (de) 1996-10-10
CA2020951A1 (en) 1991-06-08
DE69026210D1 (de) 1996-05-02
AR243291A1 (es) 1993-07-30
EP0431341A3 (en) 1992-04-15
US4975681A (en) 1990-12-04

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Legal Events

Date Code Title Description
FF Decision: intention to grant
KD Notifcation of receipt (letter patent)
FG Letter patent granted
B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 14/11/2005