JPS6444875A - Body detector - Google Patents

Body detector

Info

Publication number
JPS6444875A
JPS6444875A JP20207887A JP20207887A JPS6444875A JP S6444875 A JPS6444875 A JP S6444875A JP 20207887 A JP20207887 A JP 20207887A JP 20207887 A JP20207887 A JP 20207887A JP S6444875 A JPS6444875 A JP S6444875A
Authority
JP
Japan
Prior art keywords
detection
region
distance
present
counting
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
JP20207887A
Other languages
Japanese (ja)
Other versions
JPH05676B2 (en
Inventor
Toshiki Yamane
Hironobu Inoue
Susumu Katayama
Naoya Azuma
Toshimasa Takagi
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.)
Panasonic Electric Works Co Ltd
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 JP20207887A priority Critical patent/JPS6444875A/en
Publication of JPS6444875A publication Critical patent/JPS6444875A/en
Publication of JPH05676B2 publication Critical patent/JPH05676B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To shorten a detection time, by starting the counting of the receiving number of times of a reflected wave when a body is present in a preparatory detection region larger than a main detection region becoming the detection object of the body and outputting detection output when the count value becomes a predetermined value or more when the body is present in the main detection region. CONSTITUTION:A detection region 7 of a main detection distance d1 becoming the detection object of a body 4 and a preparatory detection region 8 of a preparatory detection distance d2 larger than the distance d1 are set. When the body 4 is present in the region 8, the counting of the receiving number of times of a reflected wave is started and, when the count value becomes a preset predetermined value or more when the body 4 is present in the region 7, detection output is issued. Since the counting of the reflected wave is started from the point of time when the body 4 is present at the distance d2 separated from the distance d1 to be detected actually, the counting number of times in the region 7 can be reduced and, therefore, the time before the detection output is obtained after the body 4 enters the region can be shortened.
JP20207887A 1987-08-13 1987-08-13 Body detector Granted JPS6444875A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20207887A JPS6444875A (en) 1987-08-13 1987-08-13 Body detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20207887A JPS6444875A (en) 1987-08-13 1987-08-13 Body detector

Publications (2)

Publication Number Publication Date
JPS6444875A true JPS6444875A (en) 1989-02-17
JPH05676B2 JPH05676B2 (en) 1993-01-06

Family

ID=16451592

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20207887A Granted JPS6444875A (en) 1987-08-13 1987-08-13 Body detector

Country Status (1)

Country Link
JP (1) JPS6444875A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008058234A (en) * 2006-09-01 2008-03-13 Toyota Motor Corp Obstacle detection device for vehicles

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5880581A (en) * 1981-11-06 1983-05-14 Matsushita Electric Ind Co Ltd Ultrasonic type obstacle detecting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5880581A (en) * 1981-11-06 1983-05-14 Matsushita Electric Ind Co Ltd Ultrasonic type obstacle detecting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008058234A (en) * 2006-09-01 2008-03-13 Toyota Motor Corp Obstacle detection device for vehicles

Also Published As

Publication number Publication date
JPH05676B2 (en) 1993-01-06

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