GB1554661A - Dual frequency radar intruder detector - Google Patents

Dual frequency radar intruder detector

Info

Publication number
GB1554661A
GB1554661A GB1334976A GB1334976A GB1554661A GB 1554661 A GB1554661 A GB 1554661A GB 1334976 A GB1334976 A GB 1334976A GB 1334976 A GB1334976 A GB 1334976A GB 1554661 A GB1554661 A GB 1554661A
Authority
GB
United Kingdom
Prior art keywords
dual frequency
frequency radar
intruder detector
intruder
detector
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
GB1334976A
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.)
Shorrock Developments Ltd
Original Assignee
Shorrock Developments 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 Shorrock Developments Ltd filed Critical Shorrock Developments Ltd
Priority to GB1334976A priority Critical patent/GB1554661A/en
Publication of GB1554661A publication Critical patent/GB1554661A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
GB1334976A 1977-04-25 1977-04-25 Dual frequency radar intruder detector Expired GB1554661A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1334976A GB1554661A (en) 1977-04-25 1977-04-25 Dual frequency radar intruder detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1334976A GB1554661A (en) 1977-04-25 1977-04-25 Dual frequency radar intruder detector

Publications (1)

Publication Number Publication Date
GB1554661A true GB1554661A (en) 1979-10-24

Family

ID=10021343

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1334976A Expired GB1554661A (en) 1977-04-25 1977-04-25 Dual frequency radar intruder detector

Country Status (1)

Country Link
GB (1) GB1554661A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4527151A (en) * 1982-05-03 1985-07-02 Sri International Method and apparatus for intrusion detection
EP0172249A1 (en) * 1984-02-06 1986-02-26 ISRAEL, Lawrence Range limited coherent frequency doppler surveillance system
EP2045621A1 (en) 2007-09-26 2009-04-08 Honeywell International Inc. Direction of travel motion detector with automatic gain control

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4527151A (en) * 1982-05-03 1985-07-02 Sri International Method and apparatus for intrusion detection
EP0172249A1 (en) * 1984-02-06 1986-02-26 ISRAEL, Lawrence Range limited coherent frequency doppler surveillance system
EP0172249A4 (en) * 1984-02-06 1986-11-04 Leo R Close Range limited coherent frequency doppler surveillance system.
EP2045621A1 (en) 2007-09-26 2009-04-08 Honeywell International Inc. Direction of travel motion detector with automatic gain control
US7679547B2 (en) 2007-09-26 2010-03-16 Honeywell International Inc. Direction of travel motion detector with automatic gain control

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Legal Events

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