JPS59202083A - Ultrasonic alarm apparatus - Google Patents

Ultrasonic alarm apparatus

Info

Publication number
JPS59202083A
JPS59202083A JP7703783A JP7703783A JPS59202083A JP S59202083 A JPS59202083 A JP S59202083A JP 7703783 A JP7703783 A JP 7703783A JP 7703783 A JP7703783 A JP 7703783A JP S59202083 A JPS59202083 A JP S59202083A
Authority
JP
Japan
Prior art keywords
circuit
alarm
moving
detected
inputted
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
JP7703783A
Other languages
Japanese (ja)
Other versions
JPH0148995B2 (en
Inventor
Tamotsu Horinouchi
Kazuo Sagara
Original Assignee
Nippon Arefu:Kk
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 Arefu:Kk filed Critical Nippon Arefu:Kk
Priority to JP58077037A priority Critical patent/JPH0148995B2/ja
Publication of JPS59202083A publication Critical patent/JPS59202083A/en
Publication of JPH0148995B2 publication Critical patent/JPH0148995B2/ja
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S15/00Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/50Systems of measurement, based on relative movement of the target
    • G01S15/52Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S15/523Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection

Abstract

PURPOSE:To obtain stable alarm output, by separately providing an electric circuit for detecting the Doppler signal from a moving body to be detected moving so as to be separated from an alarm apparatus over a predetermined distance and an electric circuit for detecting the Doppler signal from a moving body not to be detected moving in close relation to the alarm apparatus. CONSTITUTION:An ultrasonic wave is transmitted into a warning area through a sensor 20 and reflected wave containing a Doppler signal is inputted to a detector circuit 50 through a sensor 30 and a received wave amplifying circuit 40. The detected output is inputted to electric circuits 60, 70 and the outputs thereof are inputted to an AND circuit through rectifier circuits 80, 90. In this case, the signal passing the circuit 90 is inputted to the circuit 110 through a level reversal circuit 100 and an alarm output apparatus 20 is connected to the circuit 110. The circuit 60 has characteristics sufficient for detecting an object to be detected moving at a position separated from the alarm apparatus over a predetermined distance and the circuit 70 is insufficient for detecting the object to be detected but can detect an object not to be detected moving in close relation to the alarm apparatus. By this method, erroneous detection can be prevented.
JP58077037A 1983-04-30 1983-04-30 Expired JPH0148995B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58077037A JPH0148995B2 (en) 1983-04-30 1983-04-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58077037A JPH0148995B2 (en) 1983-04-30 1983-04-30

Publications (2)

Publication Number Publication Date
JPS59202083A true JPS59202083A (en) 1984-11-15
JPH0148995B2 JPH0148995B2 (en) 1989-10-23

Family

ID=13622561

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58077037A Expired JPH0148995B2 (en) 1983-04-30 1983-04-30

Country Status (1)

Country Link
JP (1) JPH0148995B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0247590U (en) * 1988-09-27 1990-03-30
JP2011002337A (en) * 2009-06-18 2011-01-06 Panasonic Electric Works Co Ltd Moving object detection device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55121166A (en) * 1979-03-09 1980-09-18 Furuno Electric Co Ltd Tide meter
JPS5729974A (en) * 1980-07-31 1982-02-18 Matsushita Electric Works Ltd Detector for moving body by ultrasonic

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55121166A (en) * 1979-03-09 1980-09-18 Furuno Electric Co Ltd Tide meter
JPS5729974A (en) * 1980-07-31 1982-02-18 Matsushita Electric Works Ltd Detector for moving body by ultrasonic

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0247590U (en) * 1988-09-27 1990-03-30
JP2011002337A (en) * 2009-06-18 2011-01-06 Panasonic Electric Works Co Ltd Moving object detection device

Also Published As

Publication number Publication date
JPH0148995B2 (en) 1989-10-23

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