| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To facilitate detection of the peak of a reception waveform and improve accuracy in determining a curing condition. <P>SOLUTION: An ultrasonic transmitter 10 and an ultrasonic receiver 11 are installed apart from each other along the inner surface of a lining material 1 (installation process). The ultrasonic transmitter 10 transmits an ultrasonic wave of a prescribed frequency towards the lining material 1 and the ultrasonic receiver 11 receives the ultrasonic wave propagated inside the lining material 1 (ultrasonic wave measurement process). The curing condition of the lining material 1 is determined on the basis of the waveform of the ultrasonic wave received by the ultrasonic receiver 11 (determination process). Further, in the determination process, the reception waveform received by the ultrasonic receiver 11 is synthesized with a waveform temporally sifted with respect to the reception waveform and the curing condition of the lining material 1 is determined on the basis of the obtained synthetic waveform. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
