GB1365475A - Intrusion dtection system - Google Patents

Intrusion dtection system

Info

Publication number
GB1365475A
GB1365475A GB1226873A GB1226873A GB1365475A GB 1365475 A GB1365475 A GB 1365475A GB 1226873 A GB1226873 A GB 1226873A GB 1226873 A GB1226873 A GB 1226873A GB 1365475 A GB1365475 A GB 1365475A
Authority
GB
United Kingdom
Prior art keywords
waves
probe
aerial
section
splash plate
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
Application number
GB1226873A
Other languages
English (en)
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.)
MA Com Omni Spectra Inc
Original Assignee
Omni Spectra Inc
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 Omni Spectra Inc filed Critical Omni Spectra Inc
Publication of GB1365475A publication Critical patent/GB1365475A/en
Expired 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
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2491—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S13/56—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
GB1226873A 1972-03-24 1973-03-14 Intrusion dtection system Expired GB1365475A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23774572A 1972-03-24 1972-03-24

Publications (1)

Publication Number Publication Date
GB1365475A true GB1365475A (en) 1974-09-04

Family

ID=22894985

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1226873A Expired GB1365475A (en) 1972-03-24 1973-03-14 Intrusion dtection system

Country Status (2)

Country Link
JP (1) JPS499197A (xx)
GB (1) GB1365475A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227141A (en) * 1989-01-11 1990-07-18 Philips Electronic Associated Integratable transceiver
WO2014013297A1 (en) * 2012-07-20 2014-01-23 Lince Italia S.P.A. Intrusion system comprising at least a microwave detecting device
GB2553133A (en) * 2016-08-24 2018-02-28 Orisec Ltd Motion detector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60168330A (ja) * 1984-02-08 1985-08-31 川村　文六 養殖用のり網の施設方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227141A (en) * 1989-01-11 1990-07-18 Philips Electronic Associated Integratable transceiver
WO2014013297A1 (en) * 2012-07-20 2014-01-23 Lince Italia S.P.A. Intrusion system comprising at least a microwave detecting device
GB2553133A (en) * 2016-08-24 2018-02-28 Orisec Ltd Motion detector
GB2553133B (en) * 2016-08-24 2022-02-02 Orisec Ltd Motion detector

Also Published As

Publication number Publication date
JPS499197A (xx) 1974-01-26

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Legal Events

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