Improving the transmission and reception characteristics of a guided wave in the axial direction of a pipe using a long waveguide

Abstract

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.