減肉モニタリング用EMAT の高温耐久試験結果
The durability test result in high temperature of EMAT for pipe wall thinning monitoring
著者:
田川 明広 Akihiro TAGAWA 藤木 一成 Kazunari FUJIKI
発刊日:
公開日:
モニタリング 電磁超音波探触子配管減肉、パルスエコー法、共振法高温耐久性
概要
This study checks the high-temperature durability of the electromagnetic acoustic transducer (EMAT) for pipe wall inning. We inserted EMAT into the oven and measured the 10mm thickness specimen by EMAT about two years. Measurement was carried out by two kinds, a pulse echo method and a pulse echo resonance method. And igh-temperature durability was checked by both of the measuring methods. Compared with the pulse echo method, the ulse echo resonance method of measurement accuracy was better. The filter processing of removing magnet signal is equired high-temperature measurement. EMA T is a simple configuration of a coil and a magnetic combination. Therefore,sensor does not break easily. Therefore, EMAT is applicable to the pipe wall thinning monitoring of a nuclear power lant.
