JPS5587064A - Acoustic unit in fish finder - Google Patents

Acoustic unit in fish finder

Info

Publication number
JPS5587064A
JPS5587064A JP15865678A JP15865678A JPS5587064A JP S5587064 A JPS5587064 A JP S5587064A JP 15865678 A JP15865678 A JP 15865678A JP 15865678 A JP15865678 A JP 15865678A JP S5587064 A JPS5587064 A JP S5587064A
Authority
JP
Japan
Prior art keywords
signal
circuit
transmission
voltage
output
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
JP15865678A
Other languages
Japanese (ja)
Inventor
Shuhei Kaneoka
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.)
Koden Electronics Co Ltd
Original Assignee
Koden Electronics 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 Koden Electronics Co Ltd filed Critical Koden Electronics Co Ltd
Priority to JP15865678A priority Critical patent/JPS5587064A/en
Publication of JPS5587064A publication Critical patent/JPS5587064A/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 distinct the school of fish at the specific depth as the objective of fishing from that of other depth, by producing frequency signal and developing the audio of different tone in response to the voltage through the modulation of the amlifying wave forming signal of the reflection signal. CONSTITUTION:At transmission, the electric signal produced from the transmission section 3 with the output of the transmission timing pulse generator 4 is converted into ultrasonic wave pulse at the transmission and reception unit 1 through the transmission and selection circuit 2 and emitted in water. The ultrasonic wave reflected with a school of fishes in water is received with the transmission and reception unit 1, converted into electric signal and fed to the reception section 7 through the circuit 2. On the other hand, the output signal of the reception section 7 formes the signal into desired waveform at the waveform forming circuit 8 and is given to the modulator 9 and the timing voltage generating circuit 5. The output voltage of the circuit 5 is fed to the voltage frequency conversion circuit 6 to produce the frequency signal according to the voltage, modulates the output signal of the circuit 8 by giving it to the modulator 9, and the signal having a given frequency component corresponding to the depth is formed only at the period present in the reflection signal, amplified 20, and audio is produced at the electric acoustic conversion 11.
JP15865678A 1978-12-25 1978-12-25 Acoustic unit in fish finder Pending JPS5587064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15865678A JPS5587064A (en) 1978-12-25 1978-12-25 Acoustic unit in fish finder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15865678A JPS5587064A (en) 1978-12-25 1978-12-25 Acoustic unit in fish finder

Publications (1)

Publication Number Publication Date
JPS5587064A true JPS5587064A (en) 1980-07-01

Family

ID=15676467

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15865678A Pending JPS5587064A (en) 1978-12-25 1978-12-25 Acoustic unit in fish finder

Country Status (1)

Country Link
JP (1) JPS5587064A (en)

Similar Documents

Publication Publication Date Title
DE69530848D1 (en) CONTROL AND DISPLAY DEVICE
JPS5587064A (en) Acoustic unit in fish finder
JPS53134418A (en) Electronic musical instrument
EP0257687A3 (en) Digital transmission system
JPS5585272A (en) Body confirming device
JPS5557165A (en) Electronic rotary echo sounder
JPS5482226A (en) Musical tone generator
ES482602A1 (en) Acoustic horn for vehicles - has pulse width modulated circuit output to maintain constant power of horn
SE8101913L (en) PROCEDURE FOR THE CREATION OF EXCELLENT SELECTABLE ECOPULAR FORMS OF ELECTROACUSTIC AND ELECTRODYNAMIC CONVERTERS
JPS62143275U (en)
JPS537319A (en) Electronic musical instrument
JPS62160381U (en)
JPS5466722A (en) Raster scan dispaly unit
JPS5576965A (en) Acoustic device for fish detector
JPS5716371A (en) Underwater sound generator
SU488570A1 (en) Device for simulating sounds affecting fish
JPS62165580U (en)
JPS5483477A (en) Electronic time striking circuit
JPS5468273A (en) Mimic target
JPS62115185U (en)
JPS55125465A (en) Echo sounder
JPS53103771A (en) Electronic timepiele
JPS5460596A (en) Ultrasonic vehicle sensor
JPS54616A (en) Ultrasonic oscillator
JPS56168577A (en) Ultrasonic distance indicating alarming apparatus