長い導波体を利用したパイプ軸方向ガイド波送受信特性の改善

抄録

If the electromagnetic acoustic transducer (EMAT) is used directly to inspect a high temperature pipe, the EMAT becomes too hot. That’s why it is to difficult to use. Therefore, an ultrasonic sensor system with a long waveguide was developed to keep a sensor part at normal temperature. As a previous study, two types of waveguide were studied to use two types of ultrasonic guided wave. In this report, two types of ultrasonic wave sources are used to propagate two types of guided waves into a pipe. Next, the evaluation results of flaw detection are described.