JPS57172849A - Search eye device around vehicle - Google Patents

Search eye device around vehicle

Info

Publication number
JPS57172849A
JPS57172849A JP56055664A JP5566481A JPS57172849A JP S57172849 A JPS57172849 A JP S57172849A JP 56055664 A JP56055664 A JP 56055664A JP 5566481 A JP5566481 A JP 5566481A JP S57172849 A JPS57172849 A JP S57172849A
Authority
JP
Japan
Prior art keywords
range
obstacle
ranges
output
car
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
JP56055664A
Other languages
Japanese (ja)
Inventor
Teruo Kawasaki
Kazuyuki Mori
Mikio Takeuchi
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP56055664A priority Critical patent/JPS57172849A/en
Publication of JPS57172849A publication Critical patent/JPS57172849A/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

Abstract

PURPOSE:To prevent mis-detection of ranges for a device in which the range to an obstacle is detected by ultrasonic wave pulses by detecting smaller one out of ranges based on the time difference between transmission and reception of ultrasonic wave pulses and based on running ranges. CONSTITUTION:When a car moves backward approaching an obstacle D and the range between the car and the obstacle D reaches the first reference range, a passing pulse is sent from a reference range passing pulse generator 7. Then, a counter 9 counts running ranges of the car based on range signals from a running range sensor 8. An addition-subtraction circuit 10 subtracts the range data of the counter 9 from the first reference range, and sends the output to a range selection circuit 11, which compares the output from the addition-subtraction circuit 10 with the range data to the obstacle which are output from a range detector 29 of a range detection circuit 2, and it outputs the smaller range data out of the two to actuate a range indicator 3 and a warning unit 4.
JP56055664A 1981-04-15 1981-04-15 Search eye device around vehicle Pending JPS57172849A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56055664A JPS57172849A (en) 1981-04-15 1981-04-15 Search eye device around vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56055664A JPS57172849A (en) 1981-04-15 1981-04-15 Search eye device around vehicle

Publications (1)

Publication Number Publication Date
JPS57172849A true JPS57172849A (en) 1982-10-23

Family

ID=13005113

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56055664A Pending JPS57172849A (en) 1981-04-15 1981-04-15 Search eye device around vehicle

Country Status (1)

Country Link
JP (1) JPS57172849A (en)

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