GB1316087A - Target sensing apparatus - Google Patents

Target sensing apparatus

Info

Publication number
GB1316087A
GB1316087A GB3666169A GB1316087DA GB1316087A GB 1316087 A GB1316087 A GB 1316087A GB 3666169 A GB3666169 A GB 3666169A GB 1316087D A GB1316087D A GB 1316087DA GB 1316087 A GB1316087 A GB 1316087A
Authority
GB
United Kingdom
Prior art keywords
capacitor
doppler
july
charge
time period
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
GB3666169A
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.)
Microwave and Electronic Systems Ltd
Original Assignee
Microwave and Electronic Systems 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 Microwave and Electronic Systems Ltd filed Critical Microwave and Electronic Systems Ltd
Publication of GB1316087A publication Critical patent/GB1316087A/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
    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/24—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Burglar Alarm Systems (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
GB3666169A 1969-07-21 1969-07-21 Target sensing apparatus Expired GB1316087A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3666169 1969-07-21

Publications (1)

Publication Number Publication Date
GB1316087A true GB1316087A (en) 1973-05-09

Family

ID=10390128

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3666169A Expired GB1316087A (en) 1969-07-21 1969-07-21 Target sensing apparatus

Country Status (6)

Country Link
JP (1) JPS508918B1 (enrdf_load_stackoverflow)
DE (1) DE2035434A1 (enrdf_load_stackoverflow)
GB (1) GB1316087A (enrdf_load_stackoverflow)
IL (1) IL34921A0 (enrdf_load_stackoverflow)
NL (1) NL7010766A (enrdf_load_stackoverflow)
ZA (1) ZA704716B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122427A (en) * 1976-06-24 1978-10-24 Herbert Karsh Motion monitor
US4142187A (en) 1976-03-19 1979-02-27 Hochiki Corporation Dual frequency alarm device using Doppler effect for sensing a moving object
EP2290391A1 (en) * 2009-09-01 2011-03-02 Guidance IP Ltd Proximity sensors

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2129824B1 (enrdf_load_stackoverflow) * 1971-03-15 1974-05-31 Radiotechnique Compelec

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142187A (en) 1976-03-19 1979-02-27 Hochiki Corporation Dual frequency alarm device using Doppler effect for sensing a moving object
US4122427A (en) * 1976-06-24 1978-10-24 Herbert Karsh Motion monitor
EP2290391A1 (en) * 2009-09-01 2011-03-02 Guidance IP Ltd Proximity sensors
US8629771B2 (en) 2009-09-01 2014-01-14 John Anderson Proximity sensors

Also Published As

Publication number Publication date
JPS508918B1 (enrdf_load_stackoverflow) 1975-04-08
NL7010766A (enrdf_load_stackoverflow) 1971-01-25
IL34921A0 (en) 1970-12-24
ZA704716B (en) 1971-04-28
DE2035434A1 (de) 1971-02-11

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414A Case decided by the comptroller ** specification amended (sect. 14/1949)
SPA Amended specification published
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee