JPS6210391B2 - - Google Patents

Info

Publication number
JPS6210391B2
JPS6210391B2 JP2136679A JP2136679A JPS6210391B2 JP S6210391 B2 JPS6210391 B2 JP S6210391B2 JP 2136679 A JP2136679 A JP 2136679A JP 2136679 A JP2136679 A JP 2136679A JP S6210391 B2 JPS6210391 B2 JP S6210391B2
Authority
JP
Japan
Prior art keywords
net
seabed
rope
gain
transducer
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.)
Expired
Application number
JP2136679A
Other languages
English (en)
Japanese (ja)
Other versions
JPS55113972A (en
Inventor
Fukutaro Takahashi
Kyozo Yamatani
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.)
Kaijo Denki Co Ltd
Original Assignee
Kaijo Denki 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 Kaijo Denki Co Ltd filed Critical Kaijo Denki Co Ltd
Priority to JP2136679A priority Critical patent/JPS55113972A/ja
Publication of JPS55113972A publication Critical patent/JPS55113972A/ja
Publication of JPS6210391B2 publication Critical patent/JPS6210391B2/ja
Granted 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/526—Receivers
    • G01S7/527—Extracting wanted echo signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
JP2136679A 1979-02-27 1979-02-27 Fish detector for dragnet Granted JPS55113972A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2136679A JPS55113972A (en) 1979-02-27 1979-02-27 Fish detector for dragnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2136679A JPS55113972A (en) 1979-02-27 1979-02-27 Fish detector for dragnet

Publications (2)

Publication Number Publication Date
JPS55113972A JPS55113972A (en) 1980-09-02
JPS6210391B2 true JPS6210391B2 (enrdf_load_stackoverflow) 1987-03-05

Family

ID=12053089

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2136679A Granted JPS55113972A (en) 1979-02-27 1979-02-27 Fish detector for dragnet

Country Status (1)

Country Link
JP (1) JPS55113972A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS55113972A (en) 1980-09-02

Similar Documents

Publication Publication Date Title
JP6014382B2 (ja) 水中探知装置、水中表示システム、プログラムおよび水中表示方法
US3297980A (en) Echo-sounding apparatus for trawl fishing
JP4354736B2 (ja) 超音波送受信装置
JPS627515B2 (enrdf_load_stackoverflow)
JPS6210391B2 (enrdf_load_stackoverflow)
JPH05196733A (ja) 魚群探知機の単体魚判別回路
JPS6012594B2 (ja) 曳網用魚群探知機
JPH0125436B2 (enrdf_load_stackoverflow)
JPS6238667B2 (enrdf_load_stackoverflow)
JPH0672924B2 (ja) 魚群探知機における魚群探知警報発生装置
JPS5946876A (ja) 網位置検出装置
JP3822654B2 (ja) 魚群探知機
JP2561865B2 (ja) トロールネットの網口幅監視方法
JP5592673B2 (ja) 水中探知機、水中探知方法、および水中探知プログラム
JP2642759B2 (ja) 水中探知装置
JPH01210886A (ja) 魚群探知機における自動海底探査表示方法
JPH041876B2 (enrdf_load_stackoverflow)
JPH0474678B2 (enrdf_load_stackoverflow)
JPH09233032A (ja) 遠隔制御水中探査機および遠隔監視機
CN1010712B (zh) 反射信号的处理
Hopkin Cathode-ray tube displays for fish detection on trawlers
Hopkin et al. A new ultrasonic fish-detection equipment for trawlers
JPH0829531A (ja) 魚群探知機
Amos A Fisherman's Guide to Echo Sounding and Sonar Equipment: Acoustic Fish Detection Instruments
RAMAKRISHNAN et al. Evaluation in Fishing