JPS58150878A - Object detector - Google Patents

Object detector

Info

Publication number
JPS58150878A
JPS58150878A JP3326182A JP3326182A JPS58150878A JP S58150878 A JPS58150878 A JP S58150878A JP 3326182 A JP3326182 A JP 3326182A JP 3326182 A JP3326182 A JP 3326182A JP S58150878 A JPS58150878 A JP S58150878A
Authority
JP
Japan
Prior art keywords
wave
circuit
multiple reflection
detection
large multiple
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
JP3326182A
Other languages
Japanese (ja)
Inventor
Susumu Maeda
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP3326182A priority Critical patent/JPS58150878A/en
Publication of JPS58150878A publication Critical patent/JPS58150878A/en
Granted 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
    • G01S15/04Systems determining presence of a target

Abstract

PURPOSE:To prevent misdetection due to a large multiple reflection by allowing the responding of a double reading circuit to reflected waves received over more than one cycle when an energy wave is transmitted at an interval of a specified time. CONSTITUTION:A pulse-like energy wave is transmitted at an interval of a specified time through a driving circuit 17, a wave transmitter 2 and the like when the output of a transmitter is converted from ''H'' to ''L'' and vice versa on the condition that a wave transmission command unit 7 has different periods ''H'' and ''L'' which is longer than ''H''. A wave signal B4 received or the like due to a large multiple reflection fails to appear at each of continuous cycles as signals B4, one by the preceding transmission and the other by the current transmission appear within the same cycle. Therefore, when a double reading circuit 21 response to a receiver 3, a reflected wave detection circuit 18 and the like, the circuit 18 fails to the signal B4 and a detection circuit 27 outputs no detection. This prevents misdetection due to a large multiple reflection thereby enabling an accurate detection of objects.
JP3326182A 1982-03-03 1982-03-03 Object detector Granted JPS58150878A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3326182A JPS58150878A (en) 1982-03-03 1982-03-03 Object detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3326182A JPS58150878A (en) 1982-03-03 1982-03-03 Object detector

Publications (1)

Publication Number Publication Date
JPS58150878A true JPS58150878A (en) 1983-09-07

Family

ID=12381570

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3326182A Granted JPS58150878A (en) 1982-03-03 1982-03-03 Object detector

Country Status (1)

Country Link
JP (1) JPS58150878A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62187273A (en) * 1986-02-13 1987-08-15 Fuji Electric Co Ltd Ultrasonic switch
WO2021009840A1 (en) * 2019-07-16 2021-01-21 株式会社AquaFusion Underwater information display device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5272478A (en) * 1975-12-15 1977-06-16 Matsushita Electric Works Ltd Supersonic switch
JPS5287056A (en) * 1976-01-14 1977-07-20 Japan Radio Co Ltd Ultrasonic pulse type monitor for ship*s approach to berth

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5272478A (en) * 1975-12-15 1977-06-16 Matsushita Electric Works Ltd Supersonic switch
JPS5287056A (en) * 1976-01-14 1977-07-20 Japan Radio Co Ltd Ultrasonic pulse type monitor for ship*s approach to berth

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62187273A (en) * 1986-02-13 1987-08-15 Fuji Electric Co Ltd Ultrasonic switch
JPH0476585B2 (en) * 1986-02-13 1992-12-04 Fuji Electric Co Ltd
WO2021009840A1 (en) * 2019-07-16 2021-01-21 株式会社AquaFusion Underwater information display device

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