NL7712500A - Detectiestelsel met niet-lineaire resonantie- keten. - Google Patents

Detectiestelsel met niet-lineaire resonantie- keten.

Info

Publication number
NL7712500A
NL7712500A NL7712500A NL7712500A NL7712500A NL 7712500 A NL7712500 A NL 7712500A NL 7712500 A NL7712500 A NL 7712500A NL 7712500 A NL7712500 A NL 7712500A NL 7712500 A NL7712500 A NL 7712500A
Authority
NL
Netherlands
Prior art keywords
detection system
linear resonance
resonance chain
chain
linear
Prior art date
Application number
NL7712500A
Other languages
English (en)
Dutch (nl)
Original Assignee
Nedap Nv
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 Nedap Nv filed Critical Nedap Nv
Publication of NL7712500A publication Critical patent/NL7712500A/xx

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
    • G08B13/2422—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 acoustic or microwave 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
    • G08B13/2428—Tag details
    • G08B13/2431—Tag circuit details

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
NL7712500A 1976-11-15 1977-11-14 Detectiestelsel met niet-lineaire resonantie- keten. NL7712500A (nl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4751376A GB1586069A (en) 1976-11-15 1976-11-15 Detection systems

Publications (1)

Publication Number Publication Date
NL7712500A true NL7712500A (nl) 1978-05-17

Family

ID=10445252

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7712500A NL7712500A (nl) 1976-11-15 1977-11-14 Detectiestelsel met niet-lineaire resonantie- keten.

Country Status (5)

Country Link
BE (1) BE860830A (xx)
DE (1) DE2750863A1 (xx)
FR (1) FR2371128A7 (xx)
GB (1) GB1586069A (xx)
NL (1) NL7712500A (xx)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1190970A (en) * 1980-10-09 1985-07-23 Harold B. Williams Dual frequency anti-theft system
DE3234601A1 (de) * 1982-09-17 1984-03-22 Siemens AG, 1000 Berlin und 8000 München Anordnung zur markierung von personen und objekten
NL8204802A (nl) * 1982-12-10 1984-07-02 Nedap Nv Detectieplaatje met niet-lineair circuit voor een detectiestelsel.
DE3324957A1 (de) * 1983-07-11 1985-01-31 Sennheiser Electronic Kg, 3002 Wedemark Verfahren zur stromversorgung einer tragbaren nebenstation eines datenuebermittlungssystems
DE3840347A1 (de) * 1988-11-30 1990-05-31 Landstorfer Friedrich Verfahren zur messung der summenentfernung zwischen einem sende-, einem bezugs- und einem empfangsort
NL9300991A (nl) * 1993-06-09 1995-01-02 Nedap Nv Diefstaldetectiesysteem.
DE19541855C1 (de) * 1995-11-09 1997-02-20 Siemens Ag Diebstahlschutzsystem für ein Kraftfahrzeug

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631442A (en) * 1968-03-22 1971-12-28 Robert E Fearon Anti-shoplifting system
DE2352807C3 (de) * 1973-10-20 1979-10-25 Philips Patentverwaltung Gmbh, 2000 Hamburg Die Summenfrequenz erzeugender Antwortgeber für ein Sende- und Empfangssystem zur Erkennung bewegbarer Körper

Also Published As

Publication number Publication date
BE860830A (nl) 1978-05-16
DE2750863A1 (de) 1978-05-18
FR2371128A7 (fr) 1978-06-09
DE2750863C2 (xx) 1988-10-20
GB1586069A (en) 1981-03-18

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Legal Events

Date Code Title Description
BA A request for search or an international-type search has been filed
A85 Still pending on 85-01-01
BB A search report has been drawn up
BC A request for examination has been filed
BV The patent application has lapsed