Experiment of receiving ultrasonic wave by using adhesion and contact type PVDF sensor

摘要

If there is a nondestructive evaluation method for the distribution of plastic strain using the ultrasonic wave, it is useful to estimate the state before cracking on site. The authors have proposed the ultrasonic wave measurement method by combining an EMAT and PVDF, in which the couplant does not needed if the contact type PVDF sensor is used, in this paper, it reports on the results of comparing and examining the adhesion type and the contact type PVDF sensor combined with an EMAT for ultrasonic wave transmission.