WO2005116946A3 - Method and apparatus for deactivating an eas device - Google Patents

Method and apparatus for deactivating an eas device Download PDF

Info

Publication number
WO2005116946A3
WO2005116946A3 PCT/US2005/017203 US2005017203W WO2005116946A3 WO 2005116946 A3 WO2005116946 A3 WO 2005116946A3 US 2005017203 W US2005017203 W US 2005017203W WO 2005116946 A3 WO2005116946 A3 WO 2005116946A3
Authority
WO
WIPO (PCT)
Prior art keywords
resonant frequency
frequency
capacitor
transceiver coils
magnetic field
Prior art date
Application number
PCT/US2005/017203
Other languages
French (fr)
Other versions
WO2005116946A2 (en
Inventor
Xiao Hui Yang
Arthur B Fuss
Original Assignee
Xiao Hui Yang
Arthur B Fuss
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 Xiao Hui Yang, Arthur B Fuss filed Critical Xiao Hui Yang
Publication of WO2005116946A2 publication Critical patent/WO2005116946A2/en
Publication of WO2005116946A3 publication Critical patent/WO2005116946A3/en

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
    • G08B13/2468—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
    • G08B13/2405—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
    • G08B13/2408—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 ferromagnetic tags
    • G08B13/2411—Tag deactivation
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F13/00—Apparatus or processes for magnetising or demagnetising
    • H01F13/006—Methods and devices for demagnetising of magnetic bodies, e.g. workpieces, sheet material

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

A deactivator for deactivating label-style EAS devices is claimed. A preferred embodiment employs a microprocessor unit to control two transceiver coils, and a deactivation coil in series with a capacitor. The two transceiver coils are essentially two flat figure eights arranged concentrically but rotated through some angle with respect to each other. The transceiver coils are operated alternatively, first transmitting an interrogation signal and then listening for a response. When an EAS device is detected, the microprocessor unit drives the capacitor and deactivation coil at the system's resonant frequency to generate a high amplitude magnetic field then shifts the frequency of the driving current away from the resonant frequency to attenuate the magnetic field. A field sensor or current sensor provides feedback to the microprocessor to determine the resonant frequency of the system during a frequency sweep.
PCT/US2005/017203 2004-05-21 2005-05-17 Method and apparatus for deactivating an eas device WO2005116946A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/851,295 2004-05-21
US10/851,295 US7068172B2 (en) 2004-05-21 2004-05-21 Method and apparatus for deactivating an EAS device

Publications (2)

Publication Number Publication Date
WO2005116946A2 WO2005116946A2 (en) 2005-12-08
WO2005116946A3 true WO2005116946A3 (en) 2006-06-01

Family

ID=34936174

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/017203 WO2005116946A2 (en) 2004-05-21 2005-05-17 Method and apparatus for deactivating an eas device

Country Status (3)

Country Link
US (1) US7068172B2 (en)
EP (1) EP1598793A3 (en)
WO (1) WO2005116946A2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
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US7619527B2 (en) * 2005-02-08 2009-11-17 Datalogic Scanning, Inc. Integrated data reader and electronic article surveillance (EAS) system
US20070046469A1 (en) * 2005-09-01 2007-03-01 Mark Pempsell Electronic Deactivation Device for RFID Surveillance and Storage
EP2002410B1 (en) * 2006-04-05 2010-06-30 Sensormatic Electronics Corporation Electronic article surveilance activator/deactivator and method therefor
US8421628B2 (en) * 2008-02-22 2013-04-16 Xiao Hui Yang Asset protection system
US20090212952A1 (en) * 2008-02-22 2009-08-27 Xiao Hui Yang Method and apparatus for de-activating eas markers
US8451128B2 (en) 2008-02-22 2013-05-28 Xiao Hui Yang Asset protection system
US8269631B2 (en) 2008-02-22 2012-09-18 Xiao Hui Yang Anti-theft device
US8890694B2 (en) * 2012-09-13 2014-11-18 W G Security Products Anti-theft hang tag
US8381979B2 (en) 2011-01-31 2013-02-26 Metrologic Instruments, Inc. Bar code symbol reading system employing EAS-enabling faceplate bezel
US8890693B2 (en) 2012-03-30 2014-11-18 W G Security Products Method and apparatus to deactivate EAS markers

Citations (1)

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Publication number Priority date Publication date Assignee Title
US6650227B1 (en) * 1999-12-08 2003-11-18 Hid Corporation Reader for a radio frequency identification system having automatic tuning capability

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Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US6650227B1 (en) * 1999-12-08 2003-11-18 Hid Corporation Reader for a radio frequency identification system having automatic tuning capability

Also Published As

Publication number Publication date
EP1598793A3 (en) 2006-08-23
US7068172B2 (en) 2006-06-27
US20050258965A1 (en) 2005-11-24
EP1598793A2 (en) 2005-11-23
WO2005116946A2 (en) 2005-12-08

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