JPS5776464A - Underwater remote searcher - Google Patents

Underwater remote searcher

Info

Publication number
JPS5776464A
JPS5776464A JP55153328A JP15332880A JPS5776464A JP S5776464 A JPS5776464 A JP S5776464A JP 55153328 A JP55153328 A JP 55153328A JP 15332880 A JP15332880 A JP 15332880A JP S5776464 A JPS5776464 A JP S5776464A
Authority
JP
Japan
Prior art keywords
wave
signals
synchronizing
transmission
time
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
JP55153328A
Other languages
Japanese (ja)
Inventor
Masaki Tatemoto
Katsuhiko Ito
Sumio Takagi
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 JP55153328A priority Critical patent/JPS5776464A/en
Publication of JPS5776464A publication Critical patent/JPS5776464A/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 reduce electric power consumption by performing transmission to remote places only for a specified period of time after the transmission of underwater searching pulses, and performing transmission to remote places when searching signals are obtained at a time other than the specified period of time. CONSTITUTION:A clock pulse generator 15 drives a frequency divider 14 together with a synchronizing code generator 23, a counter 32, and a shift register 33. The outputs of the divider 14 form a synchronizing wave (d), a switching wave (c), a distance gate wave (e) and transmission pulses P1, P2 according to various combinations. A transmitter 3 is switched to receivers 1, 2 at every T1, T2 by a select switch 4, and emits serarching signals P1, P2 alternately from above to below fish nets. P11, P12 are detected from the lower side with a receiver 5 and P21, P22 from the upper side. Said synchronizing gate wave (d), switching wave (c), and distance gate wave (e) are combined by logical circuits and only when the seraching signals are detected in the receiver 5 in constant periods T01, P02 and at times other than these, an electric power amplifier 10 is operated to transmit signals from the fish nets to a towboat. Thereby, the consumption of batteries is reduced.
JP55153328A 1980-10-30 1980-10-30 Underwater remote searcher Pending JPS5776464A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55153328A JPS5776464A (en) 1980-10-30 1980-10-30 Underwater remote searcher

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55153328A JPS5776464A (en) 1980-10-30 1980-10-30 Underwater remote searcher

Publications (1)

Publication Number Publication Date
JPS5776464A true JPS5776464A (en) 1982-05-13

Family

ID=15560083

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55153328A Pending JPS5776464A (en) 1980-10-30 1980-10-30 Underwater remote searcher

Country Status (1)

Country Link
JP (1) JPS5776464A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6098374A (en) * 1983-11-04 1985-06-01 Oki Electric Ind Co Ltd Electronic control system radio sonobuoy

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6098374A (en) * 1983-11-04 1985-06-01 Oki Electric Ind Co Ltd Electronic control system radio sonobuoy

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