| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an ultrasonic probe capable of performing time axis calibration, sensitivity adjustment, and speed correction of a surface wave associated with temperature change, without being affected by change in the tube diameter of a tubular object, and a method for measuring a circumferential length of the tubular object. <P>SOLUTION: An ultrasonic probe comprises: a transmission oscillator 11 for transmitting an ultrasonic wave; a reception oscillator 12 for receiving the ultrasonic wave; a transmission opening 14 for fixing the transmission oscillator 11 and the reception oscillator 12 and changing the ultrasonic wave transmitted from the transmission oscillator 11 into a surface wave to propagate the surface wave to a tubular object 13; and a block body 16 having a reception opening 15 for receiving the surface wave propagated around the tubular object 13 and propagating the surface wave to the reception oscillator 12, at a bottom 17. Moreover, the transmission opening 14 and the reception opening 15 are provided at the same angle position in the circumferential direction with respect to the tubular object 13. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
