GB1482413A - Detection of movement - Google Patents

Detection of movement

Info

Publication number
GB1482413A
GB1482413A GB487877A GB487877A GB1482413A GB 1482413 A GB1482413 A GB 1482413A GB 487877 A GB487877 A GB 487877A GB 487877 A GB487877 A GB 487877A GB 1482413 A GB1482413 A GB 1482413A
Authority
GB
United Kingdom
Prior art keywords
horn
july
coupled
situated
diode
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
GB487877A
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.)
Peak Technology Ltd
Original Assignee
Peak Technology 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
Priority claimed from GB3360573A external-priority patent/GB1482412A/en
Application filed by Peak Technology Ltd filed Critical Peak Technology Ltd
Priority to GB487877A priority Critical patent/GB1482413A/en
Publication of GB1482413A publication Critical patent/GB1482413A/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)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

1482413 Intruder alarms PEAK TECHNOLOGIES Ltd 11 July 1974 [13 July 1973] 04878/77 Divided out of 1482412 Heading G4N [Also in Division H4] A Gunn effect oscillator diode 2 mounted in a first waveguide horn aerial 1 acts as the transmitter, some of the energy therefrom being coupled to a reception horn 11 (Fig. 1) by coupling probe 4 wherein is situated receiver mixed diodes D1 and D2, the signals from which are processed as described in the parent Specification. Alternatively (Fig. 2), each mixer diode D1, D2 may be situated in a separate reception horn 11, 21, coupled to the TX horn 1 by respective coupling means 14, 24.
GB487877A 1973-07-13 1974-07-11 Detection of movement Expired GB1482413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB487877A GB1482413A (en) 1973-07-13 1974-07-11 Detection of movement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3360573A GB1482412A (en) 1973-07-13 1973-07-13 Detection of movement
GB487877A GB1482413A (en) 1973-07-13 1974-07-11 Detection of movement

Publications (1)

Publication Number Publication Date
GB1482413A true GB1482413A (en) 1977-08-10

Family

ID=26239438

Family Applications (1)

Application Number Title Priority Date Filing Date
GB487877A Expired GB1482413A (en) 1973-07-13 1974-07-11 Detection of movement

Country Status (1)

Country Link
GB (1) GB1482413A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2384268A1 (en) * 1977-03-14 1978-10-13 Philips Nv RADAR DEVICE OPERATING BY DOPPLER EFFECT
FR2469718A1 (en) * 1979-11-08 1981-05-22 Getronik Elektronische Gerate Doppler radar operated movement detector - has logic circuit analysing output to allow operation of automatic doors in response to selected movements only

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2384268A1 (en) * 1977-03-14 1978-10-13 Philips Nv RADAR DEVICE OPERATING BY DOPPLER EFFECT
FR2469718A1 (en) * 1979-11-08 1981-05-22 Getronik Elektronische Gerate Doppler radar operated movement detector - has logic circuit analysing output to allow operation of automatic doors in response to selected movements only

Similar Documents

Publication Publication Date Title
CA2129076A1 (en) Handheld Obstacle Penetrating Motion Detecting Radar
GB987868A (en) Frequency shift reflector system
ES473827A1 (en) Duplex-transmitter receiver arrangement
GB1317405A (en) Homodyne doppler radar with increased target sensitivity
GB1482413A (en) Detection of movement
GB798405A (en) Radio transmitter-receiver tuning system
GB1226852A (en)
GB1445733A (en) Underwater transmission system
GB1336255A (en) Micro-wave intruder detector systems
GB1277942A (en) Improvements in radar systems
GB974495A (en) Frequency-modulated approach beacon (localizer)
GB1046923A (en) Improvements in radio jamming apparatus
GB557563A (en) Improvements in or relating to ultra high frequency radio signalling systems
GB723008A (en) Improvements in or relating to radar systems
MEUNIER et al. The telecommunication system and specific transmission parameters of the Symphonie satellite(Symphonie satellite transponder parameters, noting intelligible crosstalk)
GB1530171A (en) Miniature doppler radar systems and microwave receivers suitable therefor
GB1180001A (en) Cooperative Radar and Reflector System.
GB1403358A (en) Doppler movement detectors
JPS5618772A (en) Fm-cw radar apparatus for automobile
JPS54121691A (en) Double polarized wave transmission/reception circuit
JPS5731238A (en) Transmitter and receiver
GB1265506A (en)
GB1314990A (en) Doppler radar systems
AVERIANOV Diversity radar stations and systems(Russian book)
GB1276308A (en) Receiver for use with a direction finding or radar receiving system

Legal Events

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