| 摘要 |
PROBLEM TO BE SOLVED: To provide a fish detector that can get a position relation of a shoal of fish to a boat relatively in detail. SOLUTION: The fish detector comprises a light emission part 1 that irradiates a burst signal by laser light in the sea, a changing means for changing the direction of radiation 2 that changes the direction of radiation of the burst signal to a fixed orbit, a light receiving part 3 that receives the reflection signal of the burst signal, and a signal processing part 4 that processes the reflection signal. |
