J041031 横波用EMATによるガイド波センサの試作・評価([J041-03]超音波計測・解析法の新展開(3))

抄録

Conventional inspection of a pipe by ultrasound has any problems in terms of inspection efficiency. However, guided wave is provided with a characteristic of long-range propagation in the longitudinal direction of a pipe, so it is possible to detect defects in a wide range at once. There have been many research results of a guided wave using a conventional type ultrasonic transducer with Piezo-electric elements. Such transducers have some difficulties to use in industrial application. Therefore we tried to develop a guided wave inspection system to use an electromagnetic ultrasonic transducer (EMAT). Finally, we could confirm that guided wave can be transmitted and received in aluminum pipe by EMAT, and we have evaluated the flaw detection performance of the guided wave inspection system.