JPH04177192A - Ultrasonic distance meter - Google Patents

Ultrasonic distance meter

Info

Publication number
JPH04177192A
JPH04177192A JP30389290A JP30389290A JPH04177192A JP H04177192 A JPH04177192 A JP H04177192A JP 30389290 A JP30389290 A JP 30389290A JP 30389290 A JP30389290 A JP 30389290A JP H04177192 A JPH04177192 A JP H04177192A
Authority
JP
Japan
Prior art keywords
pulse signal
distance
ultrasonic pulse
distance measurement
reflection
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.)
Granted
Application number
JP30389290A
Other languages
Japanese (ja)
Other versions
JP2820315B2 (en
Inventor
Kunihiko Sasaki
Masao Kodera
Takeo Tsuzuki
Naohiro Sakaida
Original Assignee
Nippon Soken Inc
Nippondenso 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 Nippon Soken Inc, Nippondenso Co Ltd filed Critical Nippon Soken Inc
Priority to JP2303892A priority Critical patent/JP2820315B2/en
Publication of JPH04177192A publication Critical patent/JPH04177192A/en
Application granted granted Critical
Publication of JP2820315B2 publication Critical patent/JP2820315B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE: To improve response, prevent erroneous function due to jamming and at the same time increase the accuracy of distance measurement by setting a predetermined center frequency of the ultrasonic pulse signal emitted by itself as a standard.
CONSTITUTION: An ultrasonic pulse transmitter and receiver means 20 transmits an ultrasonic pulse signal having a determined center frequency and receives the ultrasonic pulse signal having returned due to the reflection from an object. A distance measurement means 30 measures the distance between the objects based on the information of transmission and reception of the pulse at the transmitter and receiver means 20 and indicates the measured distance on an indicator 6. A judgement means 40 compares the maximum amplitude of the received wave not subjected to band-pass filtering and the amplitude of the received wave subjected to band-pass filtering, judges by the comparison whether or not the received pulse signal wave is the reflection of the transmission by itself and determines with a control means 60 whether or not to indicate on the indicator 6 the distance measured with the distance measurement means 30 based on the judged result.
COPYRIGHT: (C)1992,JPO&Japio
JP2303892A 1990-11-13 1990-11-13 Ultrasonic ranging device Expired - Fee Related JP2820315B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2303892A JP2820315B2 (en) 1990-11-13 1990-11-13 Ultrasonic ranging device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2303892A JP2820315B2 (en) 1990-11-13 1990-11-13 Ultrasonic ranging device

Publications (2)

Publication Number Publication Date
JPH04177192A true JPH04177192A (en) 1992-06-24
JP2820315B2 JP2820315B2 (en) 1998-11-05

Family

ID=17926521

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2303892A Expired - Fee Related JP2820315B2 (en) 1990-11-13 1990-11-13 Ultrasonic ranging device

Country Status (1)

Country Link
JP (1) JP2820315B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103645478A (en) * 2013-12-20 2014-03-19 奇瑞汽车股份有限公司 Ultrasonic distance measuring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103645478A (en) * 2013-12-20 2014-03-19 奇瑞汽车股份有限公司 Ultrasonic distance measuring device

Also Published As

Publication number Publication date
JP2820315B2 (en) 1998-11-05

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