JPS556244A - Recorder of fish detector - Google Patents

Recorder of fish detector

Info

Publication number
JPS556244A
JPS556244A JP7845278A JP7845278A JPS556244A JP S556244 A JPS556244 A JP S556244A JP 7845278 A JP7845278 A JP 7845278A JP 7845278 A JP7845278 A JP 7845278A JP S556244 A JPS556244 A JP S556244A
Authority
JP
Japan
Prior art keywords
pulses
sea
waveforms
recorder
thick
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
JP7845278A
Other languages
Japanese (ja)
Inventor
Keisuke Honda
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP7845278A priority Critical patent/JPS556244A/en
Publication of JPS556244A publication Critical patent/JPS556244A/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
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
    • G01S15/102—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves using transmission of pulses having some particular characteristics

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (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 make it possible to clearly discriminate the records in the vicinity of a sea surface and in the sea by using ultrasonic waves having two kinds of pulse widthes. CONSTITUTION:Thin and thick pulses are simultaneously oscillated from oscillators 2 and 3, and the ultrasonic waves of both pulses are reflected from transmitter- receivers 4 and 5 so that the respective reflected waves are amplified at 6 and 7, respectively, and fed to a memory 8. The reflected waves of the thin pulses are shown in waveforms (a), whereas those of the thick pulses are shown in waveforms (b). By supplying the output of the memory 8 to a recorder 9, waveforms (c) are recorded so that the clear records can be obtained from the surface of a sea surface to a deep portion in the sea.
JP7845278A 1978-06-28 1978-06-28 Recorder of fish detector Pending JPS556244A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7845278A JPS556244A (en) 1978-06-28 1978-06-28 Recorder of fish detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7845278A JPS556244A (en) 1978-06-28 1978-06-28 Recorder of fish detector

Publications (1)

Publication Number Publication Date
JPS556244A true JPS556244A (en) 1980-01-17

Family

ID=13662421

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7845278A Pending JPS556244A (en) 1978-06-28 1978-06-28 Recorder of fish detector

Country Status (1)

Country Link
JP (1) JPS556244A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102074A2 (en) * 1982-08-27 1984-03-07 Hitachi, Ltd. Method and apparatus for detecting position of object with ultrasonic wave
JPH01295190A (en) * 1988-05-23 1989-11-28 Furuno Electric Co Ltd Fish finder

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS539104A (en) * 1976-07-13 1978-01-27 Seiko Instr & Electronics Ltd Cassette tape running speed detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS539104A (en) * 1976-07-13 1978-01-27 Seiko Instr & Electronics Ltd Cassette tape running speed detector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102074A2 (en) * 1982-08-27 1984-03-07 Hitachi, Ltd. Method and apparatus for detecting position of object with ultrasonic wave
EP0102074A3 (en) * 1982-08-27 1985-04-17 Hitachi, Ltd. Method and apparatus for detecting position of object with ultrasonic wave
JPH01295190A (en) * 1988-05-23 1989-11-28 Furuno Electric Co Ltd Fish finder

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