ZA832313B - Crossed beam high frequency anti-theft system - Google Patents

Crossed beam high frequency anti-theft system

Info

Publication number
ZA832313B
ZA832313B ZA832313A ZA832313A ZA832313B ZA 832313 B ZA832313 B ZA 832313B ZA 832313 A ZA832313 A ZA 832313A ZA 832313 A ZA832313 A ZA 832313A ZA 832313 B ZA832313 B ZA 832313B
Authority
ZA
South Africa
Prior art keywords
frequency
center frequency
antenna
displaced
antennae
Prior art date
Application number
ZA832313A
Other languages
English (en)
Inventor
Philip Daniel Fancher
Original Assignee
Ici America Inc
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 Ici America Inc filed Critical Ici America Inc
Publication of ZA832313B publication Critical patent/ZA832313B/xx

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
    • G08B13/2422—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 acoustic or microwave 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Acoustics & Sound (AREA)
  • Geophysics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Burglar Alarm Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Aerials With Secondary Devices (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Pyrane Compounds (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Alarm Systems (AREA)
  • Circuits Of Receivers In General (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
ZA832313A 1982-04-12 1983-03-30 Crossed beam high frequency anti-theft system ZA832313B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US36771582A 1982-04-12 1982-04-12

Publications (1)

Publication Number Publication Date
ZA832313B true ZA832313B (en) 1983-12-28

Family

ID=23448316

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA832313A ZA832313B (en) 1982-04-12 1983-03-30 Crossed beam high frequency anti-theft system

Country Status (15)

Country Link
EP (1) EP0091581B1 (fi)
JP (1) JPS5932093A (fi)
KR (1) KR910000108B1 (fi)
AT (1) ATE34474T1 (fi)
AU (1) AU558397B2 (fi)
BR (1) BR8301775A (fi)
CA (1) CA1233539A (fi)
DE (1) DE3376703D1 (fi)
DK (1) DK153183A (fi)
ES (1) ES521268A0 (fi)
FI (1) FI79625C (fi)
MC (1) MC1521A1 (fi)
NO (1) NO158390C (fi)
NZ (1) NZ203790A (fi)
ZA (1) ZA832313B (fi)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3578228D1 (de) * 1984-02-15 1990-07-19 Esselte Meto Eas Int Ab Verfahren und anordnung zur detektion eines anzeigegeraets.
US5106175A (en) * 1989-12-28 1992-04-21 At&T Bell Laboratories Locatable object suitable for underground use and methods of locating same
JPH07167427A (ja) * 1993-12-15 1995-07-04 World Seiki:Kk ガスバーナ装置及びガスオーブン及びガスバーナの燃焼制御方法
US6046682A (en) * 1997-09-29 2000-04-04 Ncr Corporation Electronic price label including noisemaker and method of locating electronic price labels
US7492259B2 (en) 2005-03-29 2009-02-17 Accu-Sort Systems, Inc. RFID conveyor system and method
US8854212B2 (en) 2009-03-30 2014-10-07 Datalogic Automation, Inc. Radio frequency identification tag identification system
ES2534702B1 (es) * 2013-09-24 2016-02-09 Ontech Security, Sl Sensor de campos electrostáticos y sistema de seguridad en espacios interiores
CN106980144A (zh) * 2017-03-22 2017-07-25 绍兴职业技术学院 一种硬标签质量参数检测电路

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO126975B (fi) * 1967-03-30 1973-04-16 John Welsh
DE2551348A1 (de) * 1975-11-15 1977-05-18 Wilhelm Jank Vorrichtung zur erkennung von resonatormarken
GB1604220A (en) * 1978-04-24 1981-12-02 Parmeko Ltd Detection systems
DE3066810D1 (en) * 1979-05-18 1984-04-12 Parmeko Ltd Method and surveillance system for detecting the presence of an e.m. wave receptor reradiator
CA1190970A (en) * 1980-10-09 1985-07-23 Harold B. Williams Dual frequency anti-theft system

Also Published As

Publication number Publication date
FI79625B (fi) 1989-09-29
BR8301775A (pt) 1983-12-20
KR910000108B1 (ko) 1991-01-21
DK153183A (da) 1983-10-13
JPS6356588B2 (fi) 1988-11-08
AU558397B2 (en) 1987-01-29
NO158390C (no) 1988-08-31
DK153183D0 (da) 1983-04-06
AU1324283A (en) 1983-10-20
FI831167A0 (fi) 1983-04-06
JPS5932093A (ja) 1984-02-21
NO158390B (no) 1988-05-24
EP0091581A3 (en) 1986-01-15
EP0091581A2 (en) 1983-10-19
MC1521A1 (fr) 1984-02-10
DE3376703D1 (en) 1988-06-23
KR840004597A (ko) 1984-10-22
ES8404061A1 (es) 1984-04-01
EP0091581B1 (en) 1988-05-18
NZ203790A (en) 1986-06-11
FI831167L (fi) 1983-10-13
NO831275L (no) 1983-10-13
ATE34474T1 (de) 1988-06-15
ES521268A0 (es) 1984-04-01
CA1233539A (en) 1988-03-01
FI79625C (fi) 1990-01-10

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