C212 電磁超音波共鳴法による配管減肉のオンラインモニタリング(OS6 減肉検査・モニタリングおよび劣化時の材料強度)

概要

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In this study, Electromagnetic Acoustic Resonance method (EMAR) is applied to online monitoring of pipe wall thinning, and accuracy and stability of measurement is discussed through field tests using a large-scale corrosion test loop. Although EMAR has a high capability of evaluating thickness or ultrasonic velocity, targets are usually limited to ones with simple geometry such as plates. In order to measure thickness of pipes with complicated wall thinning, superposition of nth compression for data processing method is applied to extract thickness information from spectral responses. Results of two-month monitoring show that EMAR with the proposed signal processing method has a capability of evaluating pipe wall thinning with the accuracy of several m at high temperature of 165 degrees C.
一般社団法人日本機械学会の論文
2011-06-22