エロージョンによる減肉に対するオンラインモニタリングの検討


英字タイトル:
Evaluation of online thickness monitoring system for wall thinning by erosion.
著者:
吉田 正志 Masashi YOSHIDA 熊谷 克彦 Katsuhiko KUMAGAI
発刊日:
公開日:
カテゴリ: 第14回
キーワードタグ:

概要

Pipe wall thickness measurements by ultrasonic (UT) sensors can be difficult as the roughness of the inner surface develops by certain corrosion mechanisms. In this study, the applicability of flexible UT sensors with single and dual element transducer were evaluated using carbon steel plates with localized sand erosion that simulates pipe walls with rough inner surface. While the thickness measurement by single transducer sensors with B-B method failed after certain amount of erosion, the newly developed sensor, “Flex-Dry UTM” with dual probes, proved to be feasible. Applying R-B method to Thin Film UT Sensor with single element transducer was also effective. In addition, wireless data transfer system using LPWA was also developed. Wall thickness data from the UT sensors were successfully transmitted between PCs located in different concrete buildings separated by 120 meters.


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