FR2553523B1 - INDUCTIVE THEFT PROTECTION ALARM BY DETECTION OF RESONANT CIRCUITS - Google Patents

INDUCTIVE THEFT PROTECTION ALARM BY DETECTION OF RESONANT CIRCUITS

Info

Publication number
FR2553523B1
FR2553523B1 FR8316593A FR8316593A FR2553523B1 FR 2553523 B1 FR2553523 B1 FR 2553523B1 FR 8316593 A FR8316593 A FR 8316593A FR 8316593 A FR8316593 A FR 8316593A FR 2553523 B1 FR2553523 B1 FR 2553523B1
Authority
FR
France
Prior art keywords
detection
resonant circuits
theft protection
protection alarm
inductive theft
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
Application number
FR8316593A
Other languages
French (fr)
Other versions
FR2553523A1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR8316593A priority Critical patent/FR2553523B1/en
Publication of FR2553523A1 publication Critical patent/FR2553523A1/en
Application granted granted Critical
Publication of FR2553523B1 publication Critical patent/FR2553523B1/en
Expired 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
    • G08B13/2414—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
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered 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
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G08B13/2442—Tag materials and material properties thereof, e.g. magnetic material details
    • 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
    • G08B13/2488—Timing issues, e.g. synchronising measures to avoid signal collision, with multiple emitters or a single emitter and receiver
FR8316593A 1983-10-17 1983-10-17 INDUCTIVE THEFT PROTECTION ALARM BY DETECTION OF RESONANT CIRCUITS Expired FR2553523B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8316593A FR2553523B1 (en) 1983-10-17 1983-10-17 INDUCTIVE THEFT PROTECTION ALARM BY DETECTION OF RESONANT CIRCUITS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8316593A FR2553523B1 (en) 1983-10-17 1983-10-17 INDUCTIVE THEFT PROTECTION ALARM BY DETECTION OF RESONANT CIRCUITS

Publications (2)

Publication Number Publication Date
FR2553523A1 FR2553523A1 (en) 1985-04-19
FR2553523B1 true FR2553523B1 (en) 1986-06-13

Family

ID=9293273

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8316593A Expired FR2553523B1 (en) 1983-10-17 1983-10-17 INDUCTIVE THEFT PROTECTION ALARM BY DETECTION OF RESONANT CIRCUITS

Country Status (1)

Country Link
FR (1) FR2553523B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107636743A (en) * 2015-04-02 2018-01-26 Ntl有限责任公司 The antitheft RF Technology for Measuring of RFID and/or RFID/EM

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK161227C (en) * 1986-01-27 1991-11-25 Antonson Security Denmark Aps DEVICE DETECTOR SYNCHRONIZER DEVICE
FR2623914A1 (en) * 1987-11-26 1989-06-02 Ribiere Guy ELECTRONIC DEVICE FOR DETECTION OF A PRODUCT MARKER, AT THE EXIT OF A STORE
NL8900658A (en) * 1989-03-17 1990-10-16 Nedap Nv HIGH-FREQUENT SHOPPING THEFT DETECTION SYSTEM ACCORDING TO THE TRANSMISSION PRINCIPLE.
EP0419273B1 (en) * 1989-09-21 1994-11-30 Sarasota Automation Limited Improvements in inductive loop vehicle detectors
NL9001033A (en) * 1990-05-01 1991-12-02 Nedap Nv SHOP THEFT DETECTION SYSTEM WITH PARTIALLY PROTECTED ANTENNAS.
EP1010990B1 (en) * 1998-12-18 2006-06-07 Firma Ing. Klaus Ebinger Arrangement for generation and/or receiving a magnetic field
DE19858714A1 (en) * 1998-12-18 2000-06-21 Ebinger Klaus Ing Fa Gate probe

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4095214A (en) * 1976-06-17 1978-06-13 Knogo Corporation Electronic monitoring system and responder device
NL7708012A (en) * 1977-07-19 1979-01-23 Nedap Nv DETECTION SYSTEM.
US4135184A (en) * 1977-08-31 1979-01-16 Knogo Corporation Electronic theft detection system for monitoring wide passageways
US4243980A (en) * 1978-02-17 1981-01-06 Lichtblau G J Antenna system for electronic security installations

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107636743A (en) * 2015-04-02 2018-01-26 Ntl有限责任公司 The antitheft RF Technology for Measuring of RFID and/or RFID/EM
CN107636743B (en) * 2015-04-02 2019-08-06 Ntl有限责任公司 The antitheft RF Technology for Measuring of RFID and/or RFID/EM

Also Published As

Publication number Publication date
FR2553523A1 (en) 1985-04-19

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Legal Events

Date Code Title Description
ST Notification of lapse