2822 直列マルチセンサ光ファイバAEシステムを用いたAEのダイナミクス推定と音源位置標定(S37-1 非破壊評価とモニタリング(1),S37 非破壊評価とモニタリング)

概要

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We developed a new cascade multi sensor AE system using optical fiber sensor. An optical fiber sensor was wound over hollow pipes with different diameters in series and divided into several AE sensors. The fiber between the plate and pipe first detected the in-plane motion of AE as the Lamb wave and then the resonant wave with resonance frequencies of the pipes. We studied source dynamics and source location of artificial sources using steel needle pull off. For the study of the source dynamics, we simulated waveform of first arrival So-mode Lamb wave utilizing the experimental overall transfer function of the second kind. Location of Lamb wave AEs on an aluminum plate were successfully estimated by using unique location method.
2006-09-15