GB2201770B - Security sensors - Google Patents

Security sensors

Info

Publication number
GB2201770B
GB2201770B GB8700867A GB8700867A GB2201770B GB 2201770 B GB2201770 B GB 2201770B GB 8700867 A GB8700867 A GB 8700867A GB 8700867 A GB8700867 A GB 8700867A GB 2201770 B GB2201770 B GB 2201770B
Authority
GB
United Kingdom
Prior art keywords
security sensors
security
sensors
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.)
Expired - Fee Related
Application number
GB8700867A
Other versions
GB8700867D0 (en
GB2201770A (en
Inventor
John O'brian Maclean
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.)
Carrier Fire and Security UK Ltd
Original Assignee
Racal Guardall Scotland 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 Racal Guardall Scotland Ltd filed Critical Racal Guardall Scotland Ltd
Priority to GB8700867A priority Critical patent/GB2201770B/en
Publication of GB8700867D0 publication Critical patent/GB8700867D0/en
Publication of GB2201770A publication Critical patent/GB2201770A/en
Application granted granted Critical
Publication of GB2201770B publication Critical patent/GB2201770B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems
    • G08B13/193—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems using focusing means
    • 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
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
GB8700867A 1987-01-15 1987-01-15 Security sensors Expired - Fee Related GB2201770B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8700867A GB2201770B (en) 1987-01-15 1987-01-15 Security sensors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8700867A GB2201770B (en) 1987-01-15 1987-01-15 Security sensors

Publications (3)

Publication Number Publication Date
GB8700867D0 GB8700867D0 (en) 1987-02-18
GB2201770A GB2201770A (en) 1988-09-07
GB2201770B true GB2201770B (en) 1990-11-14

Family

ID=10610721

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8700867A Expired - Fee Related GB2201770B (en) 1987-01-15 1987-01-15 Security sensors

Country Status (1)

Country Link
GB (1) GB2201770B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0849714B1 (en) * 1996-12-20 2002-04-17 Siemens Aktiengesellschaft Method for evaluating a signal of a motion detector
EP0939311B1 (en) * 1998-02-27 2011-02-09 Panasonic Electric Works Co., Ltd. Infrared-rays detector
US7399969B2 (en) 2003-01-21 2008-07-15 Suren Systems, Ltd. PIR motion sensor
US7399970B2 (en) 2003-01-21 2008-07-15 Suren Systems, Ltd. PIR motion sensor
US7755052B2 (en) 2003-03-14 2010-07-13 Suren Systems, Ltd. PIR motion sensor
US7183912B2 (en) 2003-03-14 2007-02-27 Suren Systems, Ltd. PIR motion sensor utilizing sum and difference sensor signals
US8314390B2 (en) 2006-09-11 2012-11-20 Suren Systems, Ltd. PIR motion sensor system
EP3067870B1 (en) * 2015-03-11 2017-11-01 Philips Lighting Holding B.V. Suppression of popcorn noise in passive infrared detector

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2093986A (en) * 1980-12-16 1982-09-08 Fujitec Kk Lift control system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2093986A (en) * 1980-12-16 1982-09-08 Fujitec Kk Lift control system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WO A1 86/010 *

Also Published As

Publication number Publication date
GB8700867D0 (en) 1987-02-18
GB2201770A (en) 1988-09-07

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970115