GB1533426A - Inhibiting circuit for an obstacle detector - Google Patents

Inhibiting circuit for an obstacle detector

Info

Publication number
GB1533426A
GB1533426A GB2377/76A GB237776A GB1533426A GB 1533426 A GB1533426 A GB 1533426A GB 2377/76 A GB2377/76 A GB 2377/76A GB 237776 A GB237776 A GB 237776A GB 1533426 A GB1533426 A GB 1533426A
Authority
GB
United Kingdom
Prior art keywords
obstacle
detector
vehicle
output
detection
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
GB2377/76A
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.)
Lignes Telegraphiques et Telephoniques LTT SA
Original Assignee
Lignes Telegraphiques et Telephoniques LTT SA
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 Lignes Telegraphiques et Telephoniques LTT SA filed Critical Lignes Telegraphiques et Telephoniques LTT SA
Publication of GB1533426A publication Critical patent/GB1533426A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R99/00—Subject matter not provided for in other groups of this subclass
    • 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
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/16—Anti-collision systems
    • G08G1/166—Anti-collision systems for active traffic, e.g. moving vehicles, pedestrians, bikes
    • 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
    • G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

1533426 Radio obstacle detection LIGNES TELEGRAPHIQUES ET TELEPHONIQUES 21 Jan 1976 [29 Jan 1975] 02377/76 Heading H4D With a Doppler effect obstacle detector mounted at the front of a vehicle, it is difficult, with r.f. frequencies and aerial dimensions in use, to confine detected 'obstacles' to those actually lying in the path of the vehicle. To effectively narrow the angular zone of detection, an inhibiting radar/direction finder is added, wherein microwave radiation is alternately radiated from small angularly offset printed circuit aerials 13, 14, Fig. 2, in respective beams 3 and 4, Fig. 1, which overlap in an angular region 6 lying along the axis of the vehicle. Echoes from an 'obstacle' are detected using a third small printed circuit aerial 20 with a reception lobe 5. With the line to the 'obstacle' outside the region 6, e.g. at P2, the detector (21) output is as S2, Fig. 3, i.e. no echoes due to radiation from beam 4. With the 'obstacle' at P3 however the output S3 at no time falls to zero. After removal of the D.C. component by capacitor C a threshold detector 22 produces an output from signal S3, which signal is used to enable the utilization of detection signals from the Doppler effect obstacle detector.
GB2377/76A 1975-01-29 1976-01-21 Inhibiting circuit for an obstacle detector Expired GB1533426A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7502713A FR2299684A1 (en) 1975-01-29 1975-01-29 RADIOELECTRIC OBSTACLE DETECTOR INHIBITOR DEVICE

Publications (1)

Publication Number Publication Date
GB1533426A true GB1533426A (en) 1978-11-22

Family

ID=9150445

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2377/76A Expired GB1533426A (en) 1975-01-29 1976-01-21 Inhibiting circuit for an obstacle detector

Country Status (5)

Country Link
BE (1) BE837738A (en)
DE (1) DE2603317C3 (en)
FR (1) FR2299684A1 (en)
GB (1) GB1533426A (en)
IT (1) IT1057083B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139445A (en) * 1983-05-06 1984-11-07 Nissan Motor Vehicle lidar
GB2253759A (en) * 1991-02-06 1992-09-16 Marconi Gec Ltd Detection system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2613080A1 (en) * 1987-03-26 1988-09-30 Galland Jean Claude Method and devices for directional detection with distance threshold

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482162A (en) * 1943-06-05 1949-09-20 Bell Telephone Labor Inc Directive microwave antenna
US3412402A (en) * 1966-09-01 1968-11-19 Packard Bell Electronics Corp Warning system for vehicles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139445A (en) * 1983-05-06 1984-11-07 Nissan Motor Vehicle lidar
US4632543A (en) * 1983-05-06 1986-12-30 Nissan Motor Company, Limited Optical radar system for vehicles
GB2253759A (en) * 1991-02-06 1992-09-16 Marconi Gec Ltd Detection system

Also Published As

Publication number Publication date
IT1057083B (en) 1982-03-10
FR2299684B1 (en) 1979-04-13
DE2603317C3 (en) 1980-03-27
DE2603317A1 (en) 1976-08-05
FR2299684A1 (en) 1976-08-27
BE837738A (en) 1976-05-14
DE2603317B2 (en) 1979-07-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee