JPS5587064A - Acoustic unit in fish finder - Google Patents
Acoustic unit in fish finderInfo
- 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
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.
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) |
-
1978
- 1978-12-25 JP JP15865678A patent/JPS5587064A/en active Pending
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