CH681051A5 - - Google Patents

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Publication number
CH681051A5
CH681051A5 CH107889A CH107889A CH681051A5 CH 681051 A5 CH681051 A5 CH 681051A5 CH 107889 A CH107889 A CH 107889A CH 107889 A CH107889 A CH 107889A CH 681051 A5 CH681051 A5 CH 681051A5
Authority
CH
Switzerland
Prior art keywords
transmitter
receiver
signals
pair
frequency band
Prior art date
Application number
CH107889A
Other languages
German (de)
English (en)
Inventor
Markus Martinides
Original Assignee
Actron Entwicklungs Ag
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 Actron Entwicklungs Ag filed Critical Actron Entwicklungs Ag
Priority to CH107889A priority Critical patent/CH681051A5/de
Priority to EP19900102051 priority patent/EP0388609B1/de
Priority to DE59010785T priority patent/DE59010785D1/de
Priority to JP6992190A priority patent/JPH02284294A/ja
Priority to US07/894,709 priority patent/US5371490A/en
Publication of CH681051A5 publication Critical patent/CH681051A5/de

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
    • G08B13/2414—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 inductive 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
    • 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

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)
  • Burglar Alarm Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
CH107889A 1989-03-22 1989-03-22 CH681051A5 (enrdf_load_stackoverflow)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CH107889A CH681051A5 (enrdf_load_stackoverflow) 1989-03-22 1989-03-22
EP19900102051 EP0388609B1 (de) 1989-03-22 1990-02-02 Elektronische Diebstahlsicherungseinrichtung
DE59010785T DE59010785D1 (de) 1989-03-22 1990-02-02 Elektronische Diebstahlsicherungseinrichtung
JP6992190A JPH02284294A (ja) 1989-03-22 1990-03-22 電子式盗難防止装置およびその運転方法
US07/894,709 US5371490A (en) 1989-03-22 1992-06-05 System for electronic safeguarding against burglary using multiple transmitters and receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH107889A CH681051A5 (enrdf_load_stackoverflow) 1989-03-22 1989-03-22

Publications (1)

Publication Number Publication Date
CH681051A5 true CH681051A5 (enrdf_load_stackoverflow) 1992-12-31

Family

ID=4201949

Family Applications (1)

Application Number Title Priority Date Filing Date
CH107889A CH681051A5 (enrdf_load_stackoverflow) 1989-03-22 1989-03-22

Country Status (4)

Country Link
EP (1) EP0388609B1 (enrdf_load_stackoverflow)
JP (1) JPH02284294A (enrdf_load_stackoverflow)
CH (1) CH681051A5 (enrdf_load_stackoverflow)
DE (1) DE59010785D1 (enrdf_load_stackoverflow)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740742A (en) * 1971-05-11 1973-06-19 T Thompson Method and apparatus for actuating an electric circuit
US4215342A (en) * 1978-03-31 1980-07-29 Intex Inc. Merchandise tagging technique
US4476459A (en) * 1981-10-23 1984-10-09 Knogo Corporation Theft detection method and apparatus in which the decay of a resonant circuit is detected
NL8202951A (nl) * 1982-07-21 1984-02-16 Nedap Nv Absorptiedetectiestelsel.
US4531117A (en) * 1983-07-05 1985-07-23 Minnesota Mining And Manufacturing Company Variable frequency RF electronic surveillance system
US4667185A (en) * 1985-12-06 1987-05-19 Minnesota Mining And Manufacturing Company Wireless synchronization system for electronic article surveillance system

Also Published As

Publication number Publication date
DE59010785D1 (de) 1998-02-05
EP0388609B1 (de) 1997-12-29
EP0388609A2 (de) 1990-09-26
EP0388609A3 (de) 1991-03-20
JPH02284294A (ja) 1990-11-21

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Legal Events

Date Code Title Description
PL Patent ceased