DE602006010043D1 - intrusion detector - Google Patents

intrusion detector

Info

Publication number
DE602006010043D1
DE602006010043D1 DE602006010043T DE602006010043T DE602006010043D1 DE 602006010043 D1 DE602006010043 D1 DE 602006010043D1 DE 602006010043 T DE602006010043 T DE 602006010043T DE 602006010043 T DE602006010043 T DE 602006010043T DE 602006010043 D1 DE602006010043 D1 DE 602006010043D1
Authority
DE
Germany
Prior art keywords
detector
electromagnetic radiation
alarm
signal
light source
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.)
Active
Application number
DE602006010043T
Other languages
German (de)
Inventor
Math Pantus
Stephen Mark Gee
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of DE602006010043D1 publication Critical patent/DE602006010043D1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/16—Security signalling or alarm systems, e.g. redundant systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/046—Monitoring of the detection circuits prevention of tampering with detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Glass Compositions (AREA)

Abstract

An intrusion detector provided with a passive sensor for detecting an object entering a room to be monitored, said intrusion detector comprising a housing provided with a window for said passive sensor, a light source for emitting electromagnetic radiation onto the window and in the vicinity thereof, a light detector for generating a signal with a signal value for detected electromagnetic radiation from the light source, and alarm means connected to the light detector for generating an alarm in case the electromagnetic radiation from the light source being detected by the light detector corresponds to a signal value that exceeds a maximum level or falls below a minimum level, a special feature being the fact that the light detector generates at least n signals, n being an integer greater than or equal to 2, wherein the alarm means generate an alarm in dependence on a predetermined correlation between (i) two signal values if n=2, (ii) at least n/2 signal values if n=4,6,8,... and (iii) at least (n+l)/2 signal values if n=3,5,7,...
DE602006010043T 2005-04-04 2006-04-03 intrusion detector Active DE602006010043D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1028683A NL1028683C2 (en) 2005-04-04 2005-04-04 Monitoring device.
PCT/NL2006/050070 WO2006107203A1 (en) 2005-04-04 2006-04-03 Intrusion detector

Publications (1)

Publication Number Publication Date
DE602006010043D1 true DE602006010043D1 (en) 2009-12-10

Family

ID=35267006

Family Applications (1)

Application Number Title Priority Date Filing Date
DE602006010043T Active DE602006010043D1 (en) 2005-04-04 2006-04-03 intrusion detector

Country Status (5)

Country Link
EP (1) EP1866884B1 (en)
AT (1) ATE447221T1 (en)
DE (1) DE602006010043D1 (en)
NL (1) NL1028683C2 (en)
WO (1) WO2006107203A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2000616C2 (en) 2007-04-26 2008-10-28 Gen Electric Monitoring device.
US10429177B2 (en) 2014-12-30 2019-10-01 Google Llc Blocked sensor detection and notification
US10304318B1 (en) * 2018-03-19 2019-05-28 Ademco Inc. Anti-masking assembly for intrusion detector and method of detecting application of a masking substance

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3001452A1 (en) * 1980-01-16 1981-07-23 Hans-Günther 8100 Garmisch-Partenkirchen Stadelmayr ALARM, SECURING AND MONITORING SYSTEM
IT1241278B (en) * 1990-10-19 1993-12-29 Elkron Spa ANTI-BLINDING DEVICE FOR COMPONENTS OF SECURITY SYSTEMS.
NL9200283A (en) * 1992-02-17 1993-09-16 Aritech Bv MONITORING SYSTEM.

Also Published As

Publication number Publication date
NL1028683C2 (en) 2006-10-18
ATE447221T1 (en) 2009-11-15
EP1866884A1 (en) 2007-12-19
WO2006107203A1 (en) 2006-10-12
EP1866884B1 (en) 2009-10-28

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