JPS57501550A - - Google Patents

Info

Publication number
JPS57501550A
JPS57501550A JP56503332A JP50333281A JPS57501550A JP S57501550 A JPS57501550 A JP S57501550A JP 56503332 A JP56503332 A JP 56503332A JP 50333281 A JP50333281 A JP 50333281A JP S57501550 A JPS57501550 A JP S57501550A
Authority
JP
Japan
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.)
Granted
Application number
JP56503332A
Other languages
Japanese (ja)
Other versions
JPH0353678B2 (enrdf_load_stackoverflow
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 filed Critical
Publication of JPS57501550A publication Critical patent/JPS57501550A/ja
Publication of JPH0353678B2 publication Critical patent/JPH0353678B2/ja
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
    • G08B13/2422—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
    • 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)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Burglar Alarm Systems (AREA)
JP56503332A 1980-10-09 1981-10-01 Expired - Lifetime JPH0353678B2 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19557280A 1980-10-09 1980-10-09

Publications (2)

Publication Number Publication Date
JPS57501550A true JPS57501550A (enrdf_load_stackoverflow) 1982-08-26
JPH0353678B2 JPH0353678B2 (enrdf_load_stackoverflow) 1991-08-15

Family

ID=22721923

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56503332A Expired - Lifetime JPH0353678B2 (enrdf_load_stackoverflow) 1980-10-09 1981-10-01

Country Status (12)

Country Link
EP (1) EP0062056A4 (enrdf_load_stackoverflow)
JP (1) JPH0353678B2 (enrdf_load_stackoverflow)
AU (1) AU552568B2 (enrdf_load_stackoverflow)
BR (1) BR8108829A (enrdf_load_stackoverflow)
CA (1) CA1190970A (enrdf_load_stackoverflow)
DK (1) DK161172C (enrdf_load_stackoverflow)
ES (1) ES506117A0 (enrdf_load_stackoverflow)
FI (1) FI73532C (enrdf_load_stackoverflow)
IT (1) IT1142881B (enrdf_load_stackoverflow)
NZ (1) NZ198497A (enrdf_load_stackoverflow)
WO (1) WO1982001437A1 (enrdf_load_stackoverflow)
ZA (1) ZA816937B (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3376703D1 (en) * 1982-04-12 1988-06-23 Ici America Inc Crossed beam high frequency anti-theft system
CA1236542A (en) * 1983-08-02 1988-05-10 Harold B. Williams Electronic article surveillance system having microstrip antennas
US5349332A (en) * 1992-10-13 1994-09-20 Sensormatic Electronics Corportion EAS system with requency hopping
US5347280A (en) * 1993-07-02 1994-09-13 Texas Instruments Deutschland Gmbh Frequency diversity transponder arrangement
US5831530A (en) * 1994-12-30 1998-11-03 Lace Effect, Llc Anti-theft vehicle system
US5798693A (en) * 1995-06-07 1998-08-25 Engellenner; Thomas J. Electronic locating systems
US8358209B2 (en) * 2005-06-03 2013-01-22 Sensomatic Electronics, LLC Techniques for detecting RFID tags in electronic article surveillance systems using frequency mixing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53135600A (en) * 1977-04-28 1978-11-27 Parmeko Ltd Method of supervising position of reception*reeradiation element located in surveyed zone* and reception*reeradiation element for said method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO126975B (enrdf_load_stackoverflow) * 1967-03-30 1973-04-16 John Welsh
US3631484A (en) * 1969-07-30 1971-12-28 Microlab Fxr Harmonic detection system
US3707711A (en) * 1970-04-02 1972-12-26 Peter Harold Cole Electronic surveillance system
US3895368A (en) * 1972-08-09 1975-07-15 Sensormatic Electronics Corp Surveillance system and method utilizing both electrostatic and electromagnetic fields
GB1586069A (en) * 1976-11-15 1981-03-18 Nedap Nv Detection systems
US4139844A (en) * 1977-10-07 1979-02-13 Sensormatic Electronics Corporation Surveillance method and system with electromagnetic carrier and plural range limiting signals
ZA7994B (en) * 1978-01-11 1980-01-30 Tag Radionics Ltd Presence sensing system
US4249167A (en) * 1979-06-05 1981-02-03 Magnavox Government And Industrial Electronics Company Apparatus and method for theft detection system having different frequencies

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53135600A (en) * 1977-04-28 1978-11-27 Parmeko Ltd Method of supervising position of reception*reeradiation element located in surveyed zone* and reception*reeradiation element for said method

Also Published As

Publication number Publication date
CA1190970A (en) 1985-07-23
WO1982001437A1 (en) 1982-04-29
BR8108829A (pt) 1982-08-24
ES8207351A1 (es) 1982-09-01
AU552568B2 (en) 1986-06-05
EP0062056A1 (en) 1982-10-13
DK161172C (da) 1991-11-25
FI821956A0 (fi) 1982-06-02
ZA816937B (en) 1982-11-24
IT1142881B (it) 1986-10-15
JPH0353678B2 (enrdf_load_stackoverflow) 1991-08-15
EP0062056A4 (en) 1985-06-06
FI73532C (fi) 1987-10-09
IT8149451A0 (it) 1981-10-08
DK161172B (da) 1991-06-03
AU7721981A (en) 1982-05-11
ES506117A0 (es) 1982-09-01
NZ198497A (en) 1985-08-30
FI73532B (fi) 1987-06-30
DK258082A (da) 1982-06-09

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