JPS5729974A - Detector for moving body by ultrasonic - Google Patents

Detector for moving body by ultrasonic

Info

Publication number
JPS5729974A
JPS5729974A JP10529080A JP10529080A JPS5729974A JP S5729974 A JPS5729974 A JP S5729974A JP 10529080 A JP10529080 A JP 10529080A JP 10529080 A JP10529080 A JP 10529080A JP S5729974 A JPS5729974 A JP S5729974A
Authority
JP
Japan
Prior art keywords
ultrasonic
reflection
circuit
period
vibrator
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
JP10529080A
Other languages
Japanese (ja)
Other versions
JPS6218026B2 (en
Inventor
Susumu Katayama
Hironobu Inoue
Teruhito Nakamura
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 JP10529080A priority Critical patent/JPS5729974A/en
Publication of JPS5729974A publication Critical patent/JPS5729974A/en
Publication of JPS6218026B2 publication Critical patent/JPS6218026B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/50—Systems of measurement, based on relative movement of the target
    • G01S15/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S15/523—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection

Abstract

PURPOSE:To prevent a misrecognition causd by a reflection from a still object such as plants, etc., and a reflection from rain, by continuously sending out an ultranonic pulse to the free space extending over a prescribed period. CONSTITUTION:This detector is provided with an ultrasonic oscillator 7 which is driven by an output of an oscillating circuit 1 and sends out an ultrasonic wave to the free space, a send-out period setting circuit 3 for setting a period for providing an ultrasonic output to the vibrator 7, an ultrasonic vibrator 8 for receiving a reflected signal of the ultrasonic wave in the free space, a circuit 14 for subjecting to FM-detection to a received signal at the vibrator 8, and an outputting circuit 27 for operating an alarming circuit, etc. in accordance with an FM detection output. An ultrasonic pulse is sent out continuously extending over a period >= about 4msec. In this way, a reflection by a moving human body is separated from that by a still object such as plants, etc., and only the human body reflection is taken out.
JP10529080A 1980-07-31 1980-07-31 Detector for moving body by ultrasonic Granted JPS5729974A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10529080A JPS5729974A (en) 1980-07-31 1980-07-31 Detector for moving body by ultrasonic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10529080A JPS5729974A (en) 1980-07-31 1980-07-31 Detector for moving body by ultrasonic

Publications (2)

Publication Number Publication Date
JPS5729974A true JPS5729974A (en) 1982-02-18
JPS6218026B2 JPS6218026B2 (en) 1987-04-21

Family

ID=14403547

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10529080A Granted JPS5729974A (en) 1980-07-31 1980-07-31 Detector for moving body by ultrasonic

Country Status (1)

Country Link
JP (1) JPS5729974A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59202083A (en) * 1983-04-30 1984-11-15 Nippon Arefu:Kk Ultrasonic alarm apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59202083A (en) * 1983-04-30 1984-11-15 Nippon Arefu:Kk Ultrasonic alarm apparatus
JPH0148995B2 (en) * 1983-04-30 1989-10-23 Nippon Aleph

Also Published As

Publication number Publication date
JPS6218026B2 (en) 1987-04-21

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