SE9803432D0 - Deactivatable tag for remote sensing of objects - Google Patents

Deactivatable tag for remote sensing of objects

Info

Publication number
SE9803432D0
SE9803432D0 SE9803432A SE9803432A SE9803432D0 SE 9803432 D0 SE9803432 D0 SE 9803432D0 SE 9803432 A SE9803432 A SE 9803432A SE 9803432 A SE9803432 A SE 9803432A SE 9803432 D0 SE9803432 D0 SE 9803432D0
Authority
SE
Sweden
Prior art keywords
tag
magnetic
reveal
field
identity
Prior art date
Application number
SE9803432A
Other languages
Swedish (sv)
Other versions
SE9803432L (en
Inventor
David John Stocks
Carl Tyren
Original Assignee
Rso 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 Rso Corp filed Critical Rso Corp
Priority to SE9803432A priority Critical patent/SE9803432L/en
Publication of SE9803432D0 publication Critical patent/SE9803432D0/en
Publication of SE9803432L publication Critical patent/SE9803432L/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
    • G08B13/2405—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
    • G08B13/242—Tag deactivation

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

The magnetic element part of the tag is wire, strip or band that has a length chosen to give the desired resonance at the electromagnetic signal frequency, and the element is exposed to one or more modulation fields in the detection zone, the signature(s) for which is/are detected and analysed in order to reveal the presence of the tag or its identity. The coating for the magnetic element has a higher conductivity than the element. The deactivation field has a greater amplitude than the detection field. The modulation effect is made to disappear by disturbing the magnetic properties. DETAILED DESCRIPTION - The magnetic element comprises an amorphous or nanocrystalline alloy and is designed to respond to an electromagnetic signal within a detection zone in order to reveal its presence or identity. The element is provided with a high conductivity coating except in the centre, and can be deactivated by exposing it to an electromagnetic field that heats up the uncoated centre of the element due to its higher resistance, until the crystallisation temperature is exceeded and the magnetic properties of the element are destroyed.
SE9803432A 1998-10-08 1998-10-08 Disable label for remote sensing of objects SE9803432L (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9803432A SE9803432L (en) 1998-10-08 1998-10-08 Disable label for remote sensing of objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9803432A SE9803432L (en) 1998-10-08 1998-10-08 Disable label for remote sensing of objects

Publications (2)

Publication Number Publication Date
SE9803432D0 true SE9803432D0 (en) 1998-10-08
SE9803432L SE9803432L (en) 2000-04-09

Family

ID=20412878

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9803432A SE9803432L (en) 1998-10-08 1998-10-08 Disable label for remote sensing of objects

Country Status (1)

Country Link
SE (1) SE9803432L (en)

Also Published As

Publication number Publication date
SE9803432L (en) 2000-04-09

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