JPS5739368A - Fish detector for trawl fishing - Google Patents
Fish detector for trawl fishingInfo
- Publication number
- JPS5739368A JPS5739368A JP11398380A JP11398380A JPS5739368A JP S5739368 A JPS5739368 A JP S5739368A JP 11398380 A JP11398380 A JP 11398380A JP 11398380 A JP11398380 A JP 11398380A JP S5739368 A JPS5739368 A JP S5739368A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- period
- short period
- frequency
- 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
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)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11398380A JPS5739368A (en) | 1980-08-21 | 1980-08-21 | Fish detector for trawl fishing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11398380A JPS5739368A (en) | 1980-08-21 | 1980-08-21 | Fish detector for trawl fishing |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5739368A true JPS5739368A (en) | 1982-03-04 |
JPS6249591B2 JPS6249591B2 (ja) | 1987-10-20 |
Family
ID=14626111
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11398380A Granted JPS5739368A (en) | 1980-08-21 | 1980-08-21 | Fish detector for trawl fishing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5739368A (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07259452A (ja) * | 1994-03-25 | 1995-10-09 | Alps Giken:Kk | 着脱式面格子 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5116305U (ja) * | 1974-07-24 | 1976-02-05 |
-
1980
- 1980-08-21 JP JP11398380A patent/JPS5739368A/ja active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5116305U (ja) * | 1974-07-24 | 1976-02-05 |
Also Published As
Publication number | Publication date |
---|---|
JPS6249591B2 (ja) | 1987-10-20 |
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