ATE163789T1 - Periodisches pulsdiskriminierungssystem - Google Patents

Periodisches pulsdiskriminierungssystem

Info

Publication number
ATE163789T1
ATE163789T1 AT91909560T AT91909560T ATE163789T1 AT E163789 T1 ATE163789 T1 AT E163789T1 AT 91909560 T AT91909560 T AT 91909560T AT 91909560 T AT91909560 T AT 91909560T AT E163789 T1 ATE163789 T1 AT E163789T1
Authority
AT
Austria
Prior art keywords
electromagnetic field
frequency
tag signals
frequencies
transmitter
Prior art date
Application number
AT91909560T
Other languages
English (en)
Inventor
James F Stoffer
Original Assignee
Sensormatic Electronics Corp
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 Corp filed Critical Sensormatic Electronics Corp
Application granted granted Critical
Publication of ATE163789T1 publication Critical patent/ATE163789T1/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
    • G08B13/2468—Antenna in system and the related signal processing
    • G08B13/2477—Antenna or antenna activator circuit
    • 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)
  • Radar Systems Or Details Thereof (AREA)
  • Manipulation Of Pulses (AREA)
  • Image Processing (AREA)
AT91909560T 1990-05-29 1991-04-29 Periodisches pulsdiskriminierungssystem ATE163789T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/530,900 US5300922A (en) 1990-05-29 1990-05-29 Swept frequency electronic article surveillance system having enhanced facility for tag signal detection

Publications (1)

Publication Number Publication Date
ATE163789T1 true ATE163789T1 (de) 1998-03-15

Family

ID=24115443

Family Applications (1)

Application Number Title Priority Date Filing Date
AT91909560T ATE163789T1 (de) 1990-05-29 1991-04-29 Periodisches pulsdiskriminierungssystem

Country Status (9)

Country Link
US (2) US5300922A (de)
EP (1) EP0485552B1 (de)
AT (1) ATE163789T1 (de)
AU (1) AU649450B2 (de)
CA (1) CA2059665C (de)
DE (1) DE69129002T2 (de)
ES (1) ES2113883T3 (de)
HK (1) HK1005919A1 (de)
WO (1) WO1991019278A1 (de)

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Also Published As

Publication number Publication date
EP0485552B1 (de) 1998-03-04
ES2113883T3 (es) 1998-05-16
CA2059665A1 (en) 1991-11-30
AU7876091A (en) 1991-12-31
US5463376A (en) 1995-10-31
US5300922A (en) 1994-04-05
DE69129002D1 (de) 1998-04-09
WO1991019278A1 (en) 1991-12-12
CA2059665C (en) 2000-03-21
AU649450B2 (en) 1994-05-26
EP0485552A1 (de) 1992-05-20
HK1005919A1 (en) 1999-01-29
DE69129002T2 (de) 1998-09-17
EP0485552A4 (en) 1992-10-28

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