CA2362257A1 - Wireless synchronization of pulsed magnetic eas systems - Google Patents

Wireless synchronization of pulsed magnetic eas systems Download PDF

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Publication number
CA2362257A1
CA2362257A1 CA002362257A CA2362257A CA2362257A1 CA 2362257 A1 CA2362257 A1 CA 2362257A1 CA 002362257 A CA002362257 A CA 002362257A CA 2362257 A CA2362257 A CA 2362257A CA 2362257 A1 CA2362257 A1 CA 2362257A1
Authority
CA
Canada
Prior art keywords
eas
transmitting
systems
wireless synchronization
unique signal
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.)
Granted
Application number
CA002362257A
Other languages
French (fr)
Other versions
CA2362257C (en
Inventor
Brent F. Balch
William R. Accolla
John A. Allen
James A. Cook
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 LLC
Original Assignee
Sensormatic Electronics Corporation
Brent F. Balch
William R. Accolla
John A. Allen
James A. Cook
Tyco Acquisition Corp. Xxiv
Sensormatic Electronics, LLC
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 Sensormatic Electronics Corporation, Brent F. Balch, William R. Accolla, John A. Allen, James A. Cook, Tyco Acquisition Corp. Xxiv, Sensormatic Electronics, LLC filed Critical Sensormatic Electronics Corporation
Publication of CA2362257A1 publication Critical patent/CA2362257A1/en
Application granted granted Critical
Publication of CA2362257C publication Critical patent/CA2362257C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G08B13/2465—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

Abstract

A method for wireless synchronization of first and second magnetic electronic article surveillance (EAS) systems arranged for operation in close proximity to one another, comprising the steps of: programming each of the first and second EAS systems for transmitting at least one unique signal into respective and partially overlapping interrogation zones of the first and second EAS systems and for receiving any signals from the interrogation zones at respective and predetermined transmit and receive phases relative to a common reference;
transmitting a unique signal from the first EAS system; receiving and identifying the at least one unique signal at the second EAS system during one of the receiver phases; and, transmitting from the second EAS
system synchronously with the transmitting from the first EAS
system, responsive to the conveyed phase information.
CA002362257A 1999-02-12 2000-01-07 Wireless synchronization of pulsed magnetic eas systems Expired - Fee Related CA2362257C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/250,064 1999-02-12
US09/250,064 US6201469B1 (en) 1999-02-12 1999-02-12 Wireless synchronization of pulsed magnetic EAS systems
PCT/US2000/000356 WO2000048148A2 (en) 1999-02-12 2000-01-07 Wireless synchronization of pulsed magnetic eas systems

Publications (2)

Publication Number Publication Date
CA2362257A1 true CA2362257A1 (en) 2000-08-17
CA2362257C CA2362257C (en) 2006-12-19

Family

ID=22946172

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002362257A Expired - Fee Related CA2362257C (en) 1999-02-12 2000-01-07 Wireless synchronization of pulsed magnetic eas systems

Country Status (6)

Country Link
US (1) US6201469B1 (en)
EP (1) EP1386497B1 (en)
AU (1) AU748583B2 (en)
CA (1) CA2362257C (en)
DE (1) DE60038466T2 (en)
WO (1) WO2000048148A2 (en)

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Also Published As

Publication number Publication date
US6201469B1 (en) 2001-03-13
WO2000048148A3 (en) 2003-11-06
AU748583B2 (en) 2002-06-06
CA2362257C (en) 2006-12-19
DE60038466D1 (en) 2008-05-08
AU2602800A (en) 2000-08-29
DE60038466T2 (en) 2009-04-02
EP1386497B1 (en) 2008-03-26
EP1386497A4 (en) 2005-06-22
EP1386497A2 (en) 2004-02-04
WO2000048148A2 (en) 2000-08-17

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Effective date: 20130107