Achievement Journal Nondestr. Test. Eval. Yusa

論文掲載決定(Nondestructive Testing and Evaluation誌)!!



良いことは続く(逆もまた然り)ということか、先日の宋君のDC2採択に続き論文採択の通知が来ました。非破壊検査に関する学術論文誌、Nondestructive Testing and Evaluation誌に"Probabilistic analysis of electromagnetic acoustic resonance signals for the detection of pipe wall thinning(電磁超音波共鳴法による配管減肉検査信号の確率論的評価手法)"とのタイトルで投稿した論文が受理されました。





This study proposes a probability of detection (POD) model for the probabilistic analysis of the detectability of electromagnetic acoustic resonance (EMAR) method for the detection and evaluation of pipe wall thinning. Forty-one carbon steel plate samples with an artificially corroded groove were prepared to simulate pipe wall thinning caused by flow-assisted corrosion. Experiments were performed to gather EMAR signals from the samples, and subsequently the depths of the grooves were evaluated based on the fundamental frequency of the measured signals. The results of the experiments showed that the error in evaluating the depth of a groove tended to increase with the depth. The results also confirmed that the surface roughness of the groove would contribute to the error, and the thickness of a plate without corrosion can be quite accurately evaluated. Analyzing the measured EMAR signals using the proposed POD model, which takes these characteristics into consideration, and a conventional one confirmed that the proposed model can more reasonably evaluate the probability of detection against small wall thinning, as well as the false positive rate.


-Achievement, Journal, Nondestr. Test. Eval., Yusa

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