| 摘要 |
PURPOSE:To prevent the lowering of the detection accuracy of a detector, by positioning the exit of the flow path for taking the water as the vessel navigates in the proximity of the signal input/output section of a school of fish detector thereby preventing the adhesion of the bubble onto the surface of the signal input/output section. CONSTITUTION:The signal input/output section 8 of a school of fish detector 9 is provided between live fish tanks 2, 2 while shifted laterally from a keel 7. A pipe 10 is provided at the upstream side of said section 8 to construct a flow path R for taking the water by the dynamic pressure produced by the navigation of the vessel, and the exit port 11 of said flow path R is arranged in the proximity of the upstream of said section 8. The water taked through the flow- in port 12 is flowed out along the outer face of said section 8 thus to eliminate the bubbles adhered to the outer face of the inlet/outlet 8. |
