JPS63218885A - Ultrasonic switch - Google Patents

Ultrasonic switch

Info

Publication number
JPS63218885A
JPS63218885A JP5355087A JP5355087A JPS63218885A JP S63218885 A JPS63218885 A JP S63218885A JP 5355087 A JP5355087 A JP 5355087A JP 5355087 A JP5355087 A JP 5355087A JP S63218885 A JPS63218885 A JP S63218885A
Authority
JP
Japan
Prior art keywords
signal
circuit
counted
supplied
comparator
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
JP5355087A
Other languages
Japanese (ja)
Inventor
Kenjiro Birei
Original Assignee
Fuji Electric 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP5355087A priority Critical patent/JPS63218885A/en
Publication of JPS63218885A publication Critical patent/JPS63218885A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable the detection of a wide area using one switch by a construction wherein only a transmitted ultrasonic wave is detected in response to an output of determination of the type of received incoming waves.
CONSTITUTION: The respective outputs of oscillator circuits 3a and 3b are supplied as a carrier frequency A to a modulator circuit 5 through an automatic selector switch 4, modulated by a pulse signal B from a generator circuit 6, counted as the signal B by a counter 13, converted into the number of waves per unit time and supplied as a signal C1 to a comparator circuit 12. Meanwhile, the signal B is converted into an ultrasonic wave SS by a transmitter having an ultrasonic oscillator incorporated, and it is transmitted in the prescribed direction. A reflected wave from an object 2 to be detected is turned to a signal D through a receiver 8 and an amplifier 9 and further counted as a pulsed signal E by a counter 11 through a comparator 10, and the counted signal is supplied to the comparator circuit 12 as a signal C2 of the number of waves per unit time. When the absolute value of a difference between the signals C1 and C2 is lower than a prescribed value, an output Yes of a determination circuit 14 is delivered as a signal P.
COPYRIGHT: (C)1988,JPO&Japio
JP5355087A 1987-03-09 1987-03-09 Ultrasonic switch Pending JPS63218885A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5355087A JPS63218885A (en) 1987-03-09 1987-03-09 Ultrasonic switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5355087A JPS63218885A (en) 1987-03-09 1987-03-09 Ultrasonic switch

Publications (1)

Publication Number Publication Date
JPS63218885A true JPS63218885A (en) 1988-09-12

Family

ID=12945903

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5355087A Pending JPS63218885A (en) 1987-03-09 1987-03-09 Ultrasonic switch

Country Status (1)

Country Link
JP (1) JPS63218885A (en)

Similar Documents

Publication Publication Date Title
JPH01196589A (en) Noncontact type distance measuring device
JPH03167491A (en) Radar system
JPS63218885A (en) Ultrasonic switch
JPH04236388A (en) Radar system for motorcar
JPH0483190A (en) Ultrasonic sensor
JPS62277584A (en) Ultrasonic body detector
JPH0283484A (en) Doppler sensor
JPS61186881A (en) Ultrasonic sensor
JPS62153782A (en) Ultrasonic range finder
JPS6378084A (en) Ultrasonic distance measuring equipment
JPS597278A (en) Detector of obstruction
JPS58150878A (en) Object detector
JPH04296682A (en) Sectorscan indication circuit
JPS635288A (en) Ultrasonic body detector
JPH02145986A (en) Apparatus for discriminating moving bodies
JPH01189582A (en) Detecting apparatus of moving object
JPS58195331A (en) Communication device for visitor
JPH0454480A (en) Ultrasonic detector
JPS56100375A (en) Ultrasonic wave detector for moving body
JPH01307684A (en) Ultrasonic switch
JPS61264282A (en) Ultrasonic switch
JPH02227688A (en) Distance measuring instrument
JPH02254389A (en) Danger alarm for construction site
JPH0483189A (en) Ultrasonic sensor
JPS60183575A (en) Radar equipment