| 摘要 |
PURPOSE:To make checkup and cleaning of a seawater piping efficient by a method wherein a probe for transmission of an ultrasonic probing unit is brought into contact with one point on the outside of a pipe to be inspected, while a probe for reception is brought into contact with a point being symmetric with the above point with respect to the axis of the pipe, a pulse of an ultrasonic wave is transmitted, the waveform of a pulse received is compared with a waveform for a sound pipe, and the state of sticking of marine life is measured through the comparison. CONSTITUTION:Marine life 2 sticks to a piping 1, while the other part of the piping is filled up with seawater 3. A probe 4 for transmission of an ultrasonic probing unit is brought into contact with one point on the outside of this piping 1, while a probe 5 for reception of the ultrasonic probing unit is brought into contact with a point being symmetric with this point with respect to the axis of the piping, and a pulse of an ultrasonic wave is transmitted. Then the pulse proceeds on a line 6 in the direction of an arrow from the probe 4 for transmission and is received by the probe 5 for reception. The waveform of the received pulse is compared with a waveform for a sound pipe and thereby the state of sticking of the marine life is measured. |
