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JPS5729975A - Doppler scanning sonar - Google Patents

Doppler scanning sonar

Info

Publication number
JPS5729975A
JPS5729975A JP10559380A JP10559380A JPS5729975A JP S5729975 A JPS5729975 A JP S5729975A JP 10559380 A JP10559380 A JP 10559380A JP 10559380 A JP10559380 A JP 10559380A JP S5729975 A JPS5729975 A JP S5729975A
Authority
JP
Japan
Prior art keywords
order
output
correspond
changed over
scanning
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
JP10559380A
Other languages
Japanese (ja)
Inventor
Kazutaka Ishida
Kiyoaki Munemaru
Itsuo Fukuoka
Yoshinori Fujiwara
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.)
Furuno Electric Co Ltd
Original Assignee
Furuno Electric 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 Furuno Electric Co Ltd filed Critical Furuno Electric Co Ltd
Priority to JP10559380A priority Critical patent/JPS5729975A/en
Publication of JPS5729975A publication Critical patent/JPS5729975A/en
Pending 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
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/96—Sonar systems specially adapted for specific applications for locating fish

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To exactly detect a shoal of fish in the water, etc. by utilizing Doppler shift in a reflection signal, and displaying the extent of shift on a CRT. CONSTITUTION:Reflection signals of the acoustic wave which are sent out in order from a let of tranmitters and receivers 1-1... which are arrayed so as to correspond to each bearing direction are changed over in order to every bearing direction, and is displayed on a CRT by spiral scanning. In this case, each reflection signal is amplitude-limited 11-1..., is subjected to FM-detection 12-1..., only a prescribed frequency signal is subjected to absolute value-detection 14-1..., through BPFs, 13-1..., and its output is made to correspond to an azimuth angle of scanning and is changed over 15 in order. Also, the reflection signal is made to correspond to the azimuth angle of scanning and is changed over 7 in order, its output is converted 8 to a square wave, an analog switch 9 is operated in accordance with a converted output, and an output of the circuit 15 is intermitted and is transferred to the next stage.
JP10559380A 1980-07-30 1980-07-30 Doppler scanning sonar Pending JPS5729975A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10559380A JPS5729975A (en) 1980-07-30 1980-07-30 Doppler scanning sonar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10559380A JPS5729975A (en) 1980-07-30 1980-07-30 Doppler scanning sonar

Publications (1)

Publication Number Publication Date
JPS5729975A true JPS5729975A (en) 1982-02-18

Family

ID=14411790

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10559380A Pending JPS5729975A (en) 1980-07-30 1980-07-30 Doppler scanning sonar

Country Status (1)

Country Link
JP (1) JPS5729975A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5561641A (en) * 1992-02-06 1996-10-01 Furuno Electric, Company, Limited Underwater detection system for determining carrier frequencies of signals arriving from a wide area
JP2011191059A (en) * 2010-03-11 2011-09-29 Furuno Electric Co Ltd Underwater detection device and underwater detection method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5561641A (en) * 1992-02-06 1996-10-01 Furuno Electric, Company, Limited Underwater detection system for determining carrier frequencies of signals arriving from a wide area
JP2011191059A (en) * 2010-03-11 2011-09-29 Furuno Electric Co Ltd Underwater detection device and underwater detection method

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