JPS5594170A - Fish detector for type discrimination - Google Patents

Fish detector for type discrimination

Info

Publication number
JPS5594170A
JPS5594170A JP62879A JP62879A JPS5594170A JP S5594170 A JPS5594170 A JP S5594170A JP 62879 A JP62879 A JP 62879A JP 62879 A JP62879 A JP 62879A JP S5594170 A JPS5594170 A JP S5594170A
Authority
JP
Japan
Prior art keywords
fish
color
difference signal
signal
receivers
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
JP62879A
Other languages
Japanese (ja)
Other versions
JPS5937472B2 (en
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 JP62879A priority Critical patent/JPS5937472B2/en
Publication of JPS5594170A publication Critical patent/JPS5594170A/en
Publication of JPS5937472B2 publication Critical patent/JPS5937472B2/en
Expired 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
    • G01S7/56—Display arrangements
    • G01S7/62—Cathode-ray tube displays
    • G01S7/6263—Cathode-ray tube displays in which different colours are used

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)

Abstract

PURPOSE:To readily discriminate the fish groups of different fish type by a fish type discriminating fish detector by indicating the difference signal of reflected fltrasonic waves of adjacent frquencies with different colors. CONSTITUTION:A preference circuit 5 is connected between difference signal output circuits 4a-4c and a color CRT 8. Thus, reflection signals received under water by transmitter-receivers 1a-1d are amplified at receivers 3a-3d, respectively, and applied to difference signal output circuits 4a-4c and a color discriminator 6. Thus, the reflection signals only from small, middle and large fish type fish groups are picked up and applied to a preference circuit 5. Only the output signal specially desired to be indicated is preferentially selected and applied to a memory 7. This signal is thus stored in the memory 7 together with a color output decision signal and read suitably and indicated on a color CRT 8.
JP62879A 1979-01-10 1979-01-10 Fish species identification fish finder Expired JPS5937472B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62879A JPS5937472B2 (en) 1979-01-10 1979-01-10 Fish species identification fish finder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62879A JPS5937472B2 (en) 1979-01-10 1979-01-10 Fish species identification fish finder

Publications (2)

Publication Number Publication Date
JPS5594170A true JPS5594170A (en) 1980-07-17
JPS5937472B2 JPS5937472B2 (en) 1984-09-10

Family

ID=11478985

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62879A Expired JPS5937472B2 (en) 1979-01-10 1979-01-10 Fish species identification fish finder

Country Status (1)

Country Link
JP (1) JPS5937472B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58100765A (en) * 1981-12-11 1983-06-15 Marine Instr Co Ltd Detector for underwater body
JPS6086479A (en) * 1983-10-18 1985-05-16 Furuno Electric Co Ltd Device for discriminating sort of fish

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58100765A (en) * 1981-12-11 1983-06-15 Marine Instr Co Ltd Detector for underwater body
JPS6352715B2 (en) * 1981-12-11 1988-10-19 Kaijo Denki Kk
JPS6086479A (en) * 1983-10-18 1985-05-16 Furuno Electric Co Ltd Device for discriminating sort of fish
JPH0344271B2 (en) * 1983-10-18 1991-07-05 Furuno Electric Co

Also Published As

Publication number Publication date
JPS5937472B2 (en) 1984-09-10

Similar Documents

Publication Publication Date Title
DE3588070D1 (en) Processing of reflected signals
JPS5594170A (en) Fish detector for type discrimination
NL192906B (en) Signal level detection circuit.
JPS5313821A (en) Picture signal processing circuit
JPS5310915A (en) Binary signal detecting circuit
JPS52114212A (en) Information density determining circuit
JPS5456719A (en) Detection system for code signal featuring specified pattern
JPS55146573A (en) Binary circuit
JPS5442913A (en) Multi-path detection circuit
JPS56154681A (en) Fish detector discriminating kind of fish
JPS57758A (en) Computer
JPS51127756A (en) Fish finder
WO1990003087A3 (en) Circuit for frequency-selective detection of audio signals
JPS5383526A (en) Receiving device for multiple information signal
JPS55132162A (en) Carrier detector
JPS5765939A (en) Digital information communication system
JPS56122532A (en) Receiving antenna system
JPS5446522A (en) Cue tone signal detector
JPS5390707A (en) Detecting system for circuit fault
JPS5320710A (en) Multi-frequency signal receiver
JPS5495141A (en) Fault detector
JPS52110511A (en) Index detection unit on traffic information reception unit
JPS5797253A (en) Bit discriminating system
JPS5665533A (en) Receiver for car
JPS5372535A (en) Magnetic bubble detecting circuit