JPS5777978A - Detecting device for obstacle mounted on vehicle - Google Patents

Detecting device for obstacle mounted on vehicle

Info

Publication number
JPS5777978A
JPS5777978A JP55154409A JP15440980A JPS5777978A JP S5777978 A JPS5777978 A JP S5777978A JP 55154409 A JP55154409 A JP 55154409A JP 15440980 A JP15440980 A JP 15440980A JP S5777978 A JPS5777978 A JP S5777978A
Authority
JP
Japan
Prior art keywords
waves
ultrasonic
rectangular
ultrasonic waves
transmitted
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.)
Pending
Application number
JP55154409A
Other languages
Japanese (ja)
Inventor
Noriyuki Kurebayashi
Haruhiko Tamagawa
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.)
Hokushin Industry Co Ltd
Original Assignee
Hokushin Industry Co 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 Hokushin Industry Co Ltd filed Critical Hokushin Industry Co Ltd
Priority to JP55154409A priority Critical patent/JPS5777978A/en
Publication of JPS5777978A publication Critical patent/JPS5777978A/en
Pending 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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
    • G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To exactly measure a distance from a nearer obstacle by selecting a priority of a plurality of rectangular-wave forming circuits which deliver rectangular waves having a length from a time when ultrasonic waves are received by a plurality of ultrasonic-wave transmitting-receiving devices to the subsequent transmission of the ultrasonic wave. CONSTITUTION:Ultrasonic waves are transmitted from a plurality of ultrasonic- wave transmitting-receiving devices positioned in the right and left or in a similar manner through the intermediary of an intermittent oscillation circuit 50. Then, from RS-type FF 11L and FF 11R controlled by a delay circuit 54 which prohibits the direct going-round of the transmitted ultrasonic waves, rectangular waves having the length corresponding to the period from a time when reflected ultrasonic waves from an obstacle is received to a time when the subsequent ultrasonic waves are transmitted are generated. The first-transmitted rectangular waves out of the aforesaid rectangular waves are latched by a latch circuit 58 of a priority circuit 56 and, by lighting of LED 62L or 62R, the priority judgement on which side is nearer in distance is conducted. And, during the period of the first-generated rectangular waves, a pulse which is generated from a reference pulse generating circuit 65 and whose interval is adjustable in accordance with the change in the velocity of propagation of the ultrasonic waves corresponding to temperature is counted by a counter 66, and the distance from the nearer obstacle is indicated exactly in indication parts 72-74.
JP55154409A 1980-10-31 1980-10-31 Detecting device for obstacle mounted on vehicle Pending JPS5777978A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55154409A JPS5777978A (en) 1980-10-31 1980-10-31 Detecting device for obstacle mounted on vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55154409A JPS5777978A (en) 1980-10-31 1980-10-31 Detecting device for obstacle mounted on vehicle

Publications (1)

Publication Number Publication Date
JPS5777978A true JPS5777978A (en) 1982-05-15

Family

ID=15583512

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55154409A Pending JPS5777978A (en) 1980-10-31 1980-10-31 Detecting device for obstacle mounted on vehicle

Country Status (1)

Country Link
JP (1) JPS5777978A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19821929A1 (en) * 1997-05-15 1998-11-26 Matsushita Electric Works Ltd Obstruction recognition and signalling method especially for vehicles

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4894465A (en) * 1972-03-13 1973-12-05
JPS50597U (en) * 1973-05-01 1975-01-07
JPS504154A (en) * 1972-02-22 1975-01-17

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS504154A (en) * 1972-02-22 1975-01-17
JPS4894465A (en) * 1972-03-13 1973-12-05
JPS50597U (en) * 1973-05-01 1975-01-07

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19821929A1 (en) * 1997-05-15 1998-11-26 Matsushita Electric Works Ltd Obstruction recognition and signalling method especially for vehicles
DE19821929C2 (en) * 1997-05-15 2002-11-14 Matsushita Electric Works Ltd Obstacle detection and signaling device

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