JPS5214439A - Error eliminating circuit of detector using supersonic wave - Google Patents

Error eliminating circuit of detector using supersonic wave

Info

Publication number
JPS5214439A
JPS5214439A JP50089639A JP8963975A JPS5214439A JP S5214439 A JPS5214439 A JP S5214439A JP 50089639 A JP50089639 A JP 50089639A JP 8963975 A JP8963975 A JP 8963975A JP S5214439 A JPS5214439 A JP S5214439A
Authority
JP
Japan
Prior art keywords
detector
supersonic wave
eliminating circuit
error eliminating
reflexing
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
JP50089639A
Other languages
Japanese (ja)
Inventor
Eiji Yamamoto
Masayoshi Kawakami
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.)
Tokyo Keiki Inc
Original Assignee
Tokyo Keiki 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 Tokyo Keiki Co Ltd filed Critical Tokyo Keiki Co Ltd
Priority to JP50089639A priority Critical patent/JPS5214439A/en
Publication of JPS5214439A publication Critical patent/JPS5214439A/en
Pending legal-status Critical Current

Links

Landscapes

  • Geophysics And Detection Of Objects (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: To prevent error information of a car in a parking lot by using two circuits, one of which detects the absence of the periodic reflexing supersonic wave signal from a stationary substance, and another receives the reflexing wave from the car.
COPYRIGHT: (C)1977,JPO&Japio
JP50089639A 1975-07-24 1975-07-24 Error eliminating circuit of detector using supersonic wave Pending JPS5214439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50089639A JPS5214439A (en) 1975-07-24 1975-07-24 Error eliminating circuit of detector using supersonic wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50089639A JPS5214439A (en) 1975-07-24 1975-07-24 Error eliminating circuit of detector using supersonic wave

Publications (1)

Publication Number Publication Date
JPS5214439A true JPS5214439A (en) 1977-02-03

Family

ID=13976330

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50089639A Pending JPS5214439A (en) 1975-07-24 1975-07-24 Error eliminating circuit of detector using supersonic wave

Country Status (1)

Country Link
JP (1) JPS5214439A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59128468A (en) * 1983-01-13 1984-07-24 Tdk Corp Object detection system
JPH01119783A (en) * 1987-11-02 1989-05-11 Yamatake Honeywell Co Ltd Ultrasonic switch

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4916172A (en) * 1972-06-07 1974-02-13

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4916172A (en) * 1972-06-07 1974-02-13

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59128468A (en) * 1983-01-13 1984-07-24 Tdk Corp Object detection system
JPH0366632B2 (en) * 1983-01-13 1991-10-18 Teii Deii Kei Kk
JPH01119783A (en) * 1987-11-02 1989-05-11 Yamatake Honeywell Co Ltd Ultrasonic switch

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