CA2382172A1 - Electronic article security system employing variable time shifts - Google Patents

Electronic article security system employing variable time shifts Download PDF

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Publication number
CA2382172A1
CA2382172A1 CA002382172A CA2382172A CA2382172A1 CA 2382172 A1 CA2382172 A1 CA 2382172A1 CA 002382172 A CA002382172 A CA 002382172A CA 2382172 A CA2382172 A CA 2382172A CA 2382172 A1 CA2382172 A1 CA 2382172A1
Authority
CA
Canada
Prior art keywords
eas
electromagnetic signal
electronic article
detection zone
values
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
CA002382172A
Other languages
French (fr)
Other versions
CA2382172C (en
Inventor
Eric Eckstein
John Davies
Edwin Hopton
Nimesh Shah
Bent Svendsen
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.)
Checkpoint Systems Inc
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
Publication of CA2382172A1 publication Critical patent/CA2382172A1/en
Application granted granted Critical
Publication of CA2382172C publication Critical patent/CA2382172C/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
    • 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
    • G08B13/2482—EAS methods, e.g. description of flow chart of the detection procedure
    • 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 pulse-listen electronic article security (EAS) system (10) for detecting the presence of a security tag (42) within a detection zone is disclosed. The EAS system includes a transmitter (20) for radiating a first electromagnetic signal into the detection zone. The first electromagnetic signal is a time sequence of RF bursts emitted during each of a plurality of contiguous frame intervals in which the duration of each of the frame intervals is one of a plurality of different values. The EAS
system also includes a receiver (24) synchronized with the transmitter (20) for receiving a second electromagnetic signal re-radiated from a security tag (42) in the detection zone in response to the first electromagnetic signal. The receiver provides an output signal if a security tag is detected. The values of the plurality of the frame interval durations are selected to be different from the values of frame interval durations of other EAS systems thereby rendering the EAS system substantially free of false alarms or blockages caused by the operation of other EAS systems.
CA002382172A 1999-08-16 2000-08-14 Electronic article security system employing variable time shifts Expired - Fee Related CA2382172C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/374,655 1999-08-16
US09/374,655 US6249229B1 (en) 1999-08-16 1999-08-16 Electronic article security system employing variable time shifts
PCT/US2000/022112 WO2001013345A1 (en) 1999-08-16 2000-08-14 Electronic article security system employing variable time shifts

Publications (2)

Publication Number Publication Date
CA2382172A1 true CA2382172A1 (en) 2001-02-22
CA2382172C CA2382172C (en) 2009-03-17

Family

ID=23477690

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002382172A Expired - Fee Related CA2382172C (en) 1999-08-16 2000-08-14 Electronic article security system employing variable time shifts

Country Status (14)

Country Link
US (1) US6249229B1 (en)
EP (1) EP1204954B1 (en)
JP (1) JP4515679B2 (en)
KR (1) KR20020042812A (en)
CN (1) CN1193322C (en)
AR (2) AR026150A1 (en)
AT (1) ATE464628T1 (en)
AU (1) AU763603B2 (en)
BR (1) BR0013340A (en)
CA (1) CA2382172C (en)
DE (1) DE60044190D1 (en)
IL (1) IL148083A0 (en)
MX (1) MXPA02001717A (en)
WO (1) WO2001013345A1 (en)

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US6745008B1 (en) 2000-06-06 2004-06-01 Battelle Memorial Institute K1-53 Multi-frequency communication system and method
US7397867B2 (en) * 2000-12-14 2008-07-08 Pulse-Link, Inc. Mapping radio-frequency spectrum in a communication system
US6937674B2 (en) * 2000-12-14 2005-08-30 Pulse-Link, Inc. Mapping radio-frequency noise in an ultra-wideband communication system
US6946951B2 (en) * 2000-12-29 2005-09-20 Tagsys Australia Pty Ltd. System and method for interrogating electronic labels
WO2002054365A1 (en) * 2000-12-29 2002-07-11 Tagsys Australia Pty Ltd A system and method for interrogating electronic labels
US6753783B2 (en) 2001-03-30 2004-06-22 Augmentech, Inc. Patient positioning monitoring apparatus and method of use thereof
US6696951B2 (en) * 2001-06-13 2004-02-24 3M Innovative Properties Company Field creation in a magnetic electronic article surveillance system
US7400722B2 (en) * 2002-03-28 2008-07-15 Broadcom Corporation Methods and apparatus for performing hash operations in a cryptography accelerator
US6750768B2 (en) * 2002-04-15 2004-06-15 Wg Security Products, Inc. EAS system employing pseudorandom coding system and method
US7130327B2 (en) * 2003-06-27 2006-10-31 Northrop Grumman Corporation Digital frequency synthesis
US7384496B2 (en) * 2004-02-23 2008-06-10 Checkpoint Systems, Inc. Security tag system for fabricating a tag including an integrated surface processing system
US7119685B2 (en) * 2004-02-23 2006-10-10 Checkpoint Systems, Inc. Method for aligning capacitor plates in a security tag and a capacitor formed thereby
US8099335B2 (en) 2004-02-23 2012-01-17 Checkpoint Systems, Inc. Method and system for determining billing information in a tag fabrication process
US7704346B2 (en) 2004-02-23 2010-04-27 Checkpoint Systems, Inc. Method of fabricating a security tag in an integrated surface processing system
US7116227B2 (en) * 2004-02-23 2006-10-03 Checkpoint Systems, Inc. Tag having patterned circuit elements and a process for making same
US7138919B2 (en) * 2004-02-23 2006-11-21 Checkpoint Systems, Inc. Identification marking and method for applying the identification marking to an item
US20050231372A1 (en) * 2004-03-30 2005-10-20 Tokyo Electron Limited Device for remote identification of parts
ES2253104B1 (en) * 2004-10-20 2007-07-16 Alberto Murgui Faubell SYSTEM FOR DETECTION OF RESONANT LABELS FOR ANTIHURT EQUIPMENT AND ASSOCIATED PROCEDURE.
US7148804B2 (en) * 2004-11-08 2006-12-12 Checkpoint Systems, Inc. System and method for detecting EAS/RFID tags using step listen
CA2600445C (en) * 2005-03-07 2015-07-07 Sensormatic Electronics Corporation Adaptively transmitting a signal for activating a tag
US8786439B2 (en) * 2005-09-02 2014-07-22 Wg Security Products Active antenna
WO2007032756A1 (en) * 2005-09-09 2007-03-22 Sensormatic Electronics Corporation Eas system providing synchronized transmission
US7646305B2 (en) * 2005-10-25 2010-01-12 Checkpoint Systems, Inc. Capacitor strap
US7733290B2 (en) * 2005-12-19 2010-06-08 Sensormatic Electronics, LLC Merchandise surveillance system antenna and method
KR100796744B1 (en) * 2006-06-21 2008-01-22 노재성 RFID system improving a receiving rate
US7460059B1 (en) * 2006-10-25 2008-12-02 Sandia Corporation Removing interfering clutter associated with radar pulses that an airborne radar receives from a radar transponder
GB2476050B (en) * 2009-12-08 2013-11-13 Redcliffe Magtronics Ltd Tag detector
US9824245B2 (en) 2013-03-14 2017-11-21 Tyco Fire & Security Gmbh Methods, systems and devices for electronic article surveillance deactivation having randomized transmission rates
CN116665383A (en) * 2019-05-07 2023-08-29 Invue安全产品公司 Merchandise display security system and method
CN110632578B (en) * 2019-08-30 2022-12-09 深圳奥锐达科技有限公司 System and method for time-encoded time-of-flight distance measurement
CN112037452B (en) * 2020-09-10 2023-02-21 成都威图芯晟科技有限公司 Electronic article surveillance system, transmitter and surveillance signal generation method
CN113176451B (en) * 2021-04-22 2023-08-15 浙江威星智能仪表股份有限公司 Pulse signal detection method based on table look-up method

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Also Published As

Publication number Publication date
EP1204954A4 (en) 2005-01-12
WO2001013345A1 (en) 2001-02-22
AR026150A1 (en) 2003-01-29
DE60044190D1 (en) 2010-05-27
AR036613A2 (en) 2004-09-22
ATE464628T1 (en) 2010-04-15
EP1204954B1 (en) 2010-04-14
BR0013340A (en) 2002-04-23
CA2382172C (en) 2009-03-17
AU6636500A (en) 2001-03-13
CN1193322C (en) 2005-03-16
MXPA02001717A (en) 2002-08-06
JP4515679B2 (en) 2010-08-04
IL148083A0 (en) 2002-09-12
CN1369088A (en) 2002-09-11
JP2003507801A (en) 2003-02-25
KR20020042812A (en) 2002-06-07
AU763603B2 (en) 2003-07-31
EP1204954A1 (en) 2002-05-15
US6249229B1 (en) 2001-06-19

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Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20140814