JPH0648453Y2 - 魚体長判別用魚群探知機 - Google Patents
魚体長判別用魚群探知機Info
- Publication number
- JPH0648453Y2 JPH0648453Y2 JP16338487U JP16338487U JPH0648453Y2 JP H0648453 Y2 JPH0648453 Y2 JP H0648453Y2 JP 16338487 U JP16338487 U JP 16338487U JP 16338487 U JP16338487 U JP 16338487U JP H0648453 Y2 JPH0648453 Y2 JP H0648453Y2
- Authority
- JP
- Japan
- Prior art keywords
- fan beam
- fish
- wave
- phase difference
- received
- 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 - Lifetime
Links
- 241000251468 Actinopterygii Species 0.000 title claims description 101
- 238000001514 detection method Methods 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000002194 synthesizing effect Effects 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 8
- 230000007423 decrease Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16338487U JPH0648453Y2 (ja) | 1987-10-26 | 1987-10-26 | 魚体長判別用魚群探知機 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16338487U JPH0648453Y2 (ja) | 1987-10-26 | 1987-10-26 | 魚体長判別用魚群探知機 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0167588U JPH0167588U (en]) | 1989-05-01 |
| JPH0648453Y2 true JPH0648453Y2 (ja) | 1994-12-12 |
Family
ID=31448064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16338487U Expired - Lifetime JPH0648453Y2 (ja) | 1987-10-26 | 1987-10-26 | 魚体長判別用魚群探知機 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0648453Y2 (en]) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5102520B2 (ja) * | 2007-03-20 | 2012-12-19 | 古野電気株式会社 | 超音波探知装置および超音波探知方法 |
-
1987
- 1987-10-26 JP JP16338487U patent/JPH0648453Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0167588U (en]) | 1989-05-01 |
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