| 摘要 |
<p>PURPOSE:To prevent hurting a living finish by arranging a transmitter 4 to transmit a propagating energy wave to water and fish body as sucked into a closed tank 1 and a reception sensor 5 to receive the propagating energy wave transmitted from the transmitter 4. CONSTITUTION:A static capacity type fish pump is equipped with a transmitter 4 to transmit a propagating energy wave to a closed tank 1 and a receiver 5 to receive the propagating energy wave transmitted. Then, the energy wave transmitted from the oscillator 4 passes through water to be received. The more fish exists, the higher attenuation level in the propagating energy wave passing through water. Therefore, the more fish exists, the more the level of the propagating energy wave lowers when received with a transmission sensor 5. Thus, an amount of fish sucked into the closed tank 1 can be measured from the level of the propagating energy wave received with the reception sensor 5. In this case, there is no damage to the fish body otherwise caused by the measurement.</p> |
