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GB9725027D0 - Infra red intrusion detection system - Google Patents

Infra red intrusion detection system

Info

Publication number
GB9725027D0
GB9725027D0 GBGB9725027.8A GB9725027A GB9725027D0 GB 9725027 D0 GB9725027 D0 GB 9725027D0 GB 9725027 A GB9725027 A GB 9725027A GB 9725027 D0 GB9725027 D0 GB 9725027D0
Authority
GB
United Kingdom
Prior art keywords
detection system
transmitters
intrusion detection
transmitter
infra red
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.)
Ceased
Application number
GBGB9725027.8A
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.)
Security Enclosures Ltd
Original Assignee
Security Enclosures Ltd
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 Security Enclosures Ltd filed Critical Security Enclosures Ltd
Priority to GBGB9725027.8A priority Critical patent/GB9725027D0/en
Publication of GB9725027D0 publication Critical patent/GB9725027D0/en
Priority to AT98309021T priority patent/ATE244433T1/en
Priority to DE69816001T priority patent/DE69816001D1/en
Priority to EP98309021A priority patent/EP0919969B1/en
Ceased 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
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

An infra red intrusion detection system employs a transmitter unit having a plurality of transmitters (At, Bt, Ct, Dt) arranged in a transmitter housing and a plurality of receivers (Ar, Br, Cr, Dr) arranged in a receiver housing that is separate from the transmitter housing. A transmitter controller (2, 4, 6, 8) causes the transmitters to transmits in a predetermined sequence and at a predetermined transmit rate. A receiver controller (20, 22, 24, 26) is arranged to read the receiver inputs in a predetermined sequence and at a predetermined receive rate. By arranging for the transmit and receive rates to be different, the need for a synchronising link between the transmitters and the receivers is avoided, thus providing simplification. <IMAGE>
GBGB9725027.8A 1997-11-26 1997-11-26 Infra red intrusion detection system Ceased GB9725027D0 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GBGB9725027.8A GB9725027D0 (en) 1997-11-26 1997-11-26 Infra red intrusion detection system
AT98309021T ATE244433T1 (en) 1997-11-26 1998-11-04 INFRARED INTRUSION DETECTION SYSTEM
DE69816001T DE69816001D1 (en) 1997-11-26 1998-11-04 Infrared intrusion detection system
EP98309021A EP0919969B1 (en) 1997-11-26 1998-11-04 Infra red intrusion detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9725027.8A GB9725027D0 (en) 1997-11-26 1997-11-26 Infra red intrusion detection system

Publications (1)

Publication Number Publication Date
GB9725027D0 true GB9725027D0 (en) 1998-01-28

Family

ID=10822690

Family Applications (1)

Application Number Title Priority Date Filing Date
GBGB9725027.8A Ceased GB9725027D0 (en) 1997-11-26 1997-11-26 Infra red intrusion detection system

Country Status (4)

Country Link
EP (1) EP0919969B1 (en)
AT (1) ATE244433T1 (en)
DE (1) DE69816001D1 (en)
GB (1) GB9725027D0 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20010587A1 (en) * 2001-06-18 2002-12-18 Giuseppe Mallarino BARRIER DETECTOR DEVICE.
JP2003091784A (en) * 2001-09-19 2003-03-28 Optex Co Ltd Multistage type active infrared sensor
US8829441B2 (en) 2011-03-21 2014-09-09 Brian McLaughlin Tailgate detection using infra-red beams

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3803033A1 (en) * 1988-02-02 1989-08-10 Sick Erwin Gmbh LIGHT BARRIER GRID
EP0563516A3 (en) * 1992-01-17 1995-03-22 Control Card Srl Optical barrier for detecting moving objects
EP0567717B1 (en) * 1992-04-30 2000-08-02 REER S.p.A. Optoelectronic barrier
GB9311933D0 (en) * 1993-06-09 1993-07-28 Intelsec Systems Ltd Detector systems
DE4338978C2 (en) * 1993-11-15 1998-05-07 Sick Ag Method for the detection of defective light transmitters and / or light receivers of a light grid and light grid

Also Published As

Publication number Publication date
ATE244433T1 (en) 2003-07-15
DE69816001D1 (en) 2003-08-07
EP0919969B1 (en) 2003-07-02
EP0919969A3 (en) 2000-05-03
EP0919969A2 (en) 1999-06-02

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Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)