GB2247382B - Antenna for use in an article surveillance system - Google Patents

Antenna for use in an article surveillance system

Info

Publication number
GB2247382B
GB2247382B GB9119214A GB9119214A GB2247382B GB 2247382 B GB2247382 B GB 2247382B GB 9119214 A GB9119214 A GB 9119214A GB 9119214 A GB9119214 A GB 9119214A GB 2247382 B GB2247382 B GB 2247382B
Authority
GB
United Kingdom
Prior art keywords
antenna
surveillance system
article surveillance
article
surveillance
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 - Lifetime
Application number
GB9119214A
Other versions
GB2247382A (en
GB9119214D0 (en
Inventor
Harry E Watkins
Richard L Copeland
Brent F Balch
Hubert A Patterson
Jeffrey T Oakes
Mart Martinson
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
Priority claimed from US07/091,052 external-priority patent/US4859991A/en
Application filed by Sensormatic Electronics Corp filed Critical Sensormatic Electronics Corp
Publication of GB9119214D0 publication Critical patent/GB9119214D0/en
Publication of GB2247382A publication Critical patent/GB2247382A/en
Application granted granted Critical
Publication of GB2247382B publication Critical patent/GB2247382B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V15/00—Tags attached to, or associated with, an object, in order to enable detection of the object
    • 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
    • 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
    • G08B13/2474—Antenna or antenna activator geometry, arrangement or layout
    • 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
    • G08B13/2477—Antenna or antenna activator circuit
    • 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
    • G08B13/2482—EAS methods, e.g. description of flow chart of the detection procedure
    • 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
    • G08B13/2488—Timing issues, e.g. synchronising measures to avoid signal collision, with multiple emitters or a single emitter and receiver
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/04—Screened antennas

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Burglar Alarm Systems (AREA)
GB9119214A 1987-08-28 1991-09-06 Antenna for use in an article surveillance system Expired - Lifetime GB2247382B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/091,052 US4859991A (en) 1987-08-28 1987-08-28 Electronic article surveillance system employing time domain and/or frequency domain analysis and computerized operation
GB8818913A GB2209450B (en) 1987-08-28 1988-08-09 An electronic article surveillance system

Publications (3)

Publication Number Publication Date
GB9119214D0 GB9119214D0 (en) 1991-10-23
GB2247382A GB2247382A (en) 1992-02-26
GB2247382B true GB2247382B (en) 1992-08-12

Family

ID=26294258

Family Applications (3)

Application Number Title Priority Date Filing Date
GB9119215A Expired - Lifetime GB2247383B (en) 1987-08-28 1991-09-06 Antenna for use in an article surveillance system
GB9119214A Expired - Lifetime GB2247382B (en) 1987-08-28 1991-09-06 Antenna for use in an article surveillance system
GB9119213A Expired - Lifetime GB2247381B (en) 1987-08-28 1991-09-06 An electronic article surveillance system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9119215A Expired - Lifetime GB2247383B (en) 1987-08-28 1991-09-06 Antenna for use in an article surveillance system

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB9119213A Expired - Lifetime GB2247381B (en) 1987-08-28 1991-09-06 An electronic article surveillance system

Country Status (1)

Country Link
GB (3) GB2247383B (en)

Families Citing this family (9)

* 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
US5373301A (en) * 1993-01-04 1994-12-13 Checkpoint Systems, Inc. Transmit and receive antenna having angled crossover elements
US5699046A (en) * 1995-11-02 1997-12-16 Sensormatic Electronics Corporation EAS system employing central and local stations with shared functions
DE60038218T2 (en) * 2000-02-21 2009-02-26 Naamloze Vennootschap Nederlandsche Apparatenfabriek Nedap Antenna configuration of an electromagnetic detection system and such a system with such an antenna configuration
US6617856B1 (en) * 2002-02-15 2003-09-09 Radiodetection Limited Electronic marker locator system and method
US7285958B2 (en) 2004-01-15 2007-10-23 Metrotech Corporation, Inc. Method and apparatus for digital detection of electronic markers using frequency adaptation
JP4550447B2 (en) 2004-02-25 2010-09-22 独立行政法人科学技術振興機構 Silyl linker for nucleic acid solid phase synthesis
WO2008125621A1 (en) * 2007-04-13 2008-10-23 Alert Metalguard Aps A method, a device and a system for preventing false alarms in a theft-preventing system
PL2489025T3 (en) 2009-10-16 2017-12-29 Alert Systems Aps An electronic anti-theft protection system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2083978A (en) * 1980-08-21 1982-03-31 Knogo Corp Article theft detection
GB2101456A (en) * 1980-10-31 1983-01-12 Knogo Corp Theft detection apparatus using saturable magnetic targets
US4535323A (en) * 1982-03-15 1985-08-13 Progressive Dynamics, Inc. Preamplifying and signal processing method and apparatus for theft detection systems
US4539558A (en) * 1981-11-24 1985-09-03 Shin International, Inc. Antitheft system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS511400B1 (en) * 1969-07-11 1976-01-16
US4524350A (en) * 1982-03-15 1985-06-18 Progressive Dynamics, Inc. Detection logic and signal processing method and apparatus for theft detection systems
US4623877A (en) * 1983-06-30 1986-11-18 Knogo Corporation Method and apparatus for detection of targets in an interrogation zone
CA1234892A (en) * 1984-02-16 1988-04-05 Pierre Taillefer Security tag detection system
US4668942A (en) * 1984-11-19 1987-05-26 Progressive Dynamics, Inc. Signal analysis apparatus including recursive filter for electromagnetic surveillance system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2083978A (en) * 1980-08-21 1982-03-31 Knogo Corp Article theft detection
GB2101456A (en) * 1980-10-31 1983-01-12 Knogo Corp Theft detection apparatus using saturable magnetic targets
US4539558A (en) * 1981-11-24 1985-09-03 Shin International, Inc. Antitheft system
US4535323A (en) * 1982-03-15 1985-08-13 Progressive Dynamics, Inc. Preamplifying and signal processing method and apparatus for theft detection systems

Also Published As

Publication number Publication date
GB2247382A (en) 1992-02-26
GB9119214D0 (en) 1991-10-23
GB2247383B (en) 1992-07-29
GB9119213D0 (en) 1991-10-23
GB2247383A (en) 1992-02-26
GB2247381A (en) 1992-02-26
GB2247381B (en) 1992-08-05
GB9119215D0 (en) 1991-10-23

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20080808