NO983249L - Method and apparatus for detecting an object in an area to be monitored - Google Patents

Method and apparatus for detecting an object in an area to be monitored

Info

Publication number
NO983249L
NO983249L NO983249A NO983249A NO983249L NO 983249 L NO983249 L NO 983249L NO 983249 A NO983249 A NO 983249A NO 983249 A NO983249 A NO 983249A NO 983249 L NO983249 L NO 983249L
Authority
NO
Norway
Prior art keywords
area
threshold value
monitored
signal
urefi
Prior art date
Application number
NO983249A
Other languages
Norwegian (no)
Other versions
NO983249D0 (en
Inventor
Bodo Luebbe
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of NO983249D0 publication Critical patent/NO983249D0/en
Publication of NO983249L publication Critical patent/NO983249L/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/12—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electromagnetic waves

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geophysics (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

Det er kjent å detektere et objekt i et område som skal overvåkes ved å sende et høyfrekvent spørresignal fra en side av området og gjennom dette til en overforliggende andre side av området, hvor det mottas av en transponder, modifiseres og sendes tilbake gjennom området til den første side. Det modifiserte spørresignalet mottas på den første side av området og sammenlignes med en terskelverdi, idet et alarmsignal avgis dersom denne underskrides. En optimal innstilling av terskelverdien (Urefl) oppnås ved at det fra signalet (U) som sammenlignes med terskelverdien (Urefi), løpende dannes en middelverdi (M), ut fra hvilken det under hensyntagen til en forhåndsgitt sikkerhetsmargin, dannes en terskelverdi (Urefi).It is known to detect an object in an area to be monitored by transmitting a high frequency query signal from one side of the area and through it to an overlying other side of the area, where it is received by a transponder, modified and sent back through the area to it. first page. The modified query signal is received on the first page of the range and compared to a threshold value, with an alarm signal being output if this is lowered. An optimal setting of the threshold value (Urefl) is obtained by continuously generating a mean value (M) from the signal (U) compared with the threshold value (Urefi), from which a threshold value (Urefi) is formed, taking into account a predetermined safety margin. .

NO983249A 1996-02-22 1998-07-14 Method and apparatus for detecting an object in an area to be monitored NO983249L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1996106675 DE19606675A1 (en) 1996-02-22 1996-02-22 Method and device for detecting an object in an area to be monitored
PCT/DE1997/000299 WO1997031275A1 (en) 1996-02-22 1997-02-17 Method and device for detecting an object in a region to be monitored

Publications (2)

Publication Number Publication Date
NO983249D0 NO983249D0 (en) 1998-07-14
NO983249L true NO983249L (en) 1998-08-21

Family

ID=7786152

Family Applications (1)

Application Number Title Priority Date Filing Date
NO983249A NO983249L (en) 1996-02-22 1998-07-14 Method and apparatus for detecting an object in an area to be monitored

Country Status (5)

Country Link
EP (1) EP0883818A1 (en)
CA (1) CA2246993A1 (en)
DE (1) DE19606675A1 (en)
NO (1) NO983249L (en)
WO (1) WO1997031275A1 (en)

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995270A (en) * 1975-06-16 1976-11-30 The United States Of America As Represented By The Secretary Of The Navy Constant false alarm rate (CFAR) circuitry for minimizing extraneous target sensitivity
US4107678A (en) * 1976-09-28 1978-08-15 Westinghouse Electric Corp. Polarization correlation target seeker
DE2806448C2 (en) * 1978-02-15 1985-01-10 Brown, Boveri & Cie Ag, 6800 Mannheim System for property security and personal protection by means of a microwave barrier
GB2110825B (en) * 1981-11-06 1986-04-30 Outokumpu Oy Apparatus for detecting metal objects
DE3232437C2 (en) * 1982-09-01 1985-03-21 Brown, Boveri & Cie Ag, 6800 Mannheim Method for increasing the security of an access control system
US4725841A (en) * 1983-06-30 1988-02-16 X-Cyte, Inc. System for interrogating a passive transponder carrying phase-encoded information
US4899158A (en) * 1987-09-26 1990-02-06 Matsushita Electric Works, Ltd. Moving object discriminating system
EP0424371A1 (en) * 1988-07-08 1991-05-02 Zetetic International Limited Method and apparatus for selectively detecting objects
DE4036407C2 (en) * 1990-11-15 1994-06-01 Telefunken Microelectron Sensor system
US5508706A (en) * 1991-09-30 1996-04-16 Trw Inc. Radar signal processor
IT1265721B1 (en) * 1992-11-11 1996-12-02 Alessandro Manneschi METAL DETECTOR WITH MULTIPOLAR WINDINGS WITH THE ELIMINATION OF NEUTRALIZING EFFECTS
IT1260208B (en) * 1992-11-19 1996-04-02 Giovanni Manneschi PERFECTED METAL DETECTOR
DE4240921C1 (en) * 1992-12-04 1994-05-11 Alessandro Manneschi Metal detector for locating hidden weapons - compares signals using reception windings at different heights, to correct non-linearity
DE9305611U1 (en) * 1993-04-08 1994-05-05 Siemens AG, 80333 München Arrangement for detecting an obstacle
DE4336799A1 (en) * 1993-10-28 1995-05-04 Sel Alcatel Ag Device for the detection of, and reading out from, transponders which move relative to this device
DE9411602U1 (en) * 1994-07-18 1995-08-17 Siemens AG, 80333 München Arrangement for the detection of objects in an area to be monitored

Also Published As

Publication number Publication date
WO1997031275A1 (en) 1997-08-28
DE19606675A1 (en) 1997-08-28
CA2246993A1 (en) 1997-08-28
NO983249D0 (en) 1998-07-14
EP0883818A1 (en) 1998-12-16

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