JPS5880574A - Ultrasonic obstacle detecting device - Google Patents

Ultrasonic obstacle detecting device

Info

Publication number
JPS5880574A
JPS5880574A JP56178797A JP17879781A JPS5880574A JP S5880574 A JPS5880574 A JP S5880574A JP 56178797 A JP56178797 A JP 56178797A JP 17879781 A JP17879781 A JP 17879781A JP S5880574 A JPS5880574 A JP S5880574A
Authority
JP
Japan
Prior art keywords
comparator
signal
reliability
distance data
trouble
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
JP56178797A
Other languages
Japanese (ja)
Inventor
Makoto Otsuki
Hideo Shibuya
Shozo Honda
Fumio Kosuge
Tomoaki Abe
Minoru Toyoda
Original Assignee
Matsushita Electric Ind 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 Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Priority to JP56178797A priority Critical patent/JPS5880574A/en
Publication of JPS5880574A publication Critical patent/JPS5880574A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52004Means for monitoring or calibrating

Abstract

PURPOSE:To precisely detect an obstacle and to improve the reliability, by detecting leakage of a transmitted wave or existance of a direct wave and, when there is no detection, outputting alarm. CONSTITUTION:A tone burst signal is sent from an ultrasonic transmitter 5 to detecting circuits 9a, 9b through a transmission switch 4 during a timing signal T1 is at a ''0'' level. The output of the circuit 9a is applied to a comparator 15 through timing signals T2, T3 and the comparator 15 checks whether a direct wave exists or not. The sum of both outputs of the circuits 9a, 9b is supplied to the comparator 12 to find the distance data of the nearest obstacle detected by ultrasonic receivers 6a, 6b. When direct waves from the receiver 6b are not detected by a comparator 15 owing to a generated trouble, an FF13 is set up through the signal T3 and the distance data and the trouble are displayed on a display 20, improving the reliability of the titled device.
JP56178797A 1981-11-06 1981-11-06 Ultrasonic obstacle detecting device Pending JPS5880574A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56178797A JPS5880574A (en) 1981-11-06 1981-11-06 Ultrasonic obstacle detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56178797A JPS5880574A (en) 1981-11-06 1981-11-06 Ultrasonic obstacle detecting device

Publications (1)

Publication Number Publication Date
JPS5880574A true JPS5880574A (en) 1983-05-14

Family

ID=16054806

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56178797A Pending JPS5880574A (en) 1981-11-06 1981-11-06 Ultrasonic obstacle detecting device

Country Status (1)

Country Link
JP (1) JPS5880574A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4910512A (en) * 1987-10-19 1990-03-20 Siemens Aktiengesellschaft Monitoring equipment for the safety devices used in vehicles when driving in reverse
JPH0462494A (en) * 1990-06-29 1992-02-27 Matsushita Electric Ind Co Ltd Ultrasonic body sensing device
JP2002131428A (en) * 2000-10-25 2002-05-09 Mitsubishi Electric Corp Ultrasonic obstacle detecting device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4910512A (en) * 1987-10-19 1990-03-20 Siemens Aktiengesellschaft Monitoring equipment for the safety devices used in vehicles when driving in reverse
JPH0462494A (en) * 1990-06-29 1992-02-27 Matsushita Electric Ind Co Ltd Ultrasonic body sensing device
JP2002131428A (en) * 2000-10-25 2002-05-09 Mitsubishi Electric Corp Ultrasonic obstacle detecting device

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