JPS61260179A - Ultrasonic object detector - Google Patents

Ultrasonic object detector

Info

Publication number
JPS61260179A
JPS61260179A JP60103234A JP10323485A JPS61260179A JP S61260179 A JPS61260179 A JP S61260179A JP 60103234 A JP60103234 A JP 60103234A JP 10323485 A JP10323485 A JP 10323485A JP S61260179 A JPS61260179 A JP S61260179A
Authority
JP
Japan
Prior art keywords
ultrasonic wave
detected
transmitter
receiver
gate
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
JP60103234A
Other languages
Japanese (ja)
Inventor
Toshiki Yamane
Naoya Azuma
Susumu Katayama
Original Assignee
Matsushita Electric Works 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 Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP60103234A priority Critical patent/JPS61260179A/en
Publication of JPS61260179A publication Critical patent/JPS61260179A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent malfunction due to reflected waves from objects other than an object to be detected by providing a transmitter driving means which drives a transmitter to transmit an ultrasonic wave intermittently from the transmitter and a detecting means which detects the object in accordance with the ultrasonic wave reception state of a receiver only when the transmitted ultrasonic wave is received directly by the receiver.
CONSTITUTION: A gate is opened intermittently by a transmission gate circuit 6 to send the output of an oscillator 5, and the ultrasonic wave is transmitted intermittently from a transmitter 1. A reception gate circuit 7 detects that the gate of the transmission gate circuit 6 is opened, and the reception gate circuit 7 opens the gate when the ultrasonic wave is received directly by a receiver 2. If an object 3 to be detected does not exist, the ultrasonic wave having a level higher than the detection level is detected, and a detecting circuit 8 discriminates the absence of the object 3 to be detected thereby and does not output the detection signal. If the object 3 to be detected exists between the transmitter 1 and the receiver 2, the level of the received ultrasonic wave is lower than the detection level, and the detecting circuit 8 discriminates the presence of the object 3 to be detected thereby and outputs the detection signal.
COPYRIGHT: (C)1986,JPO&Japio
JP60103234A 1985-05-15 1985-05-15 Ultrasonic object detector Pending JPS61260179A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60103234A JPS61260179A (en) 1985-05-15 1985-05-15 Ultrasonic object detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60103234A JPS61260179A (en) 1985-05-15 1985-05-15 Ultrasonic object detector

Publications (1)

Publication Number Publication Date
JPS61260179A true JPS61260179A (en) 1986-11-18

Family

ID=14348761

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60103234A Pending JPS61260179A (en) 1985-05-15 1985-05-15 Ultrasonic object detector

Country Status (1)

Country Link
JP (1) JPS61260179A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02136780A (en) * 1988-11-17 1990-05-25 Nireco Corp Ultrasonic detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02136780A (en) * 1988-11-17 1990-05-25 Nireco Corp Ultrasonic detector

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