ES2127981T3 - INSTALLATION FOR ELECTRONIC CONTROL OF ITEMS. - Google Patents

INSTALLATION FOR ELECTRONIC CONTROL OF ITEMS.

Info

Publication number
ES2127981T3
ES2127981T3 ES95114702T ES95114702T ES2127981T3 ES 2127981 T3 ES2127981 T3 ES 2127981T3 ES 95114702 T ES95114702 T ES 95114702T ES 95114702 T ES95114702 T ES 95114702T ES 2127981 T3 ES2127981 T3 ES 2127981T3
Authority
ES
Spain
Prior art keywords
hanger
items
installation
output
electronic control
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 - Lifetime
Application number
ES95114702T
Other languages
Spanish (es)
Inventor
Nicholas David Swales
Ian Thompson-Bell
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.)
Meto International GmbH
Original Assignee
Meto International GmbH
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 Meto International GmbH filed Critical Meto International GmbH
Application granted granted Critical
Publication of ES2127981T3 publication Critical patent/ES2127981T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G08B13/2465—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

An electronic security system to prevent theft of articles uses a hanger (9), to which the article is attached, that is located within an electromagnetic field. The hanger contains an inductance and capacitance coupled as a resonator device and is located between transmitting (8) and receiving (10) aerials. A voltage controlled oscillator (2) is controlled to produce a range of frequencies that are mixed (3) with the output of a second oscillator (18) and a multiplier (19). The receiver output is mixed with a half the frequency of the VCO output and is used in the detector. The presence of the hanger triggers the alarm.
ES95114702T 1994-10-15 1995-09-19 INSTALLATION FOR ELECTRONIC CONTROL OF ITEMS. Expired - Lifetime ES2127981T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4436978A DE4436978A1 (en) 1994-10-15 1994-10-15 System for electronic article surveillance

Publications (1)

Publication Number Publication Date
ES2127981T3 true ES2127981T3 (en) 1999-05-01

Family

ID=6530921

Family Applications (1)

Application Number Title Priority Date Filing Date
ES95114702T Expired - Lifetime ES2127981T3 (en) 1994-10-15 1995-09-19 INSTALLATION FOR ELECTRONIC CONTROL OF ITEMS.

Country Status (5)

Country Link
EP (1) EP0707295B1 (en)
AT (1) ATE177551T1 (en)
AU (1) AU695143B2 (en)
DE (2) DE4436978A1 (en)
ES (1) ES2127981T3 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4356477A (en) * 1980-09-30 1982-10-26 Jan Vandebult FM/AM Electronic security system
NL8900658A (en) * 1989-03-17 1990-10-16 Nedap Nv HIGH-FREQUENT SHOPPING THEFT DETECTION SYSTEM ACCORDING TO THE TRANSMISSION PRINCIPLE.
US5321412A (en) * 1991-05-13 1994-06-14 Sensormatic Electronics Corporation Antenna arrangement with reduced coupling between transmit antenna and receive antenna
US5349339A (en) * 1992-04-07 1994-09-20 Actron Entwicklungs Ag Apparatus for the detection of labels employing subtraction of background signals

Also Published As

Publication number Publication date
DE4436978A1 (en) 1996-04-18
EP0707295B1 (en) 1999-03-10
EP0707295A1 (en) 1996-04-17
AU3421395A (en) 1996-05-02
AU695143B2 (en) 1998-08-06
ATE177551T1 (en) 1999-03-15
DE59505271D1 (en) 1999-04-15

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