複数モードのマイクロ波を利用した金属配管内表面のきず位置推定手法の高精度化


英字タイトル:
Precision Improvement of a Method to Predict the Flaw Location on an Inner Surface of a Metal Pipe Using Multiple-mode Microwaves
著者:
片桐 拓也 陳 冠任 遊佐 訓孝 橋爪 秀利 (東北大)
発刊日:
公開日:
カテゴリ: 第16回
キーワードタグ:

概要

In this study, a new signal-processing method was developed to improve the precision of locating flaw’s position using microwave NDT. The previous processing method is available only for the single-mode microwave, which causes the noise generation in the case that multi-mode microwaves propagate in a metal pipe. In order to reduce the noise, the reflections caused by the propagation of unintended modes were extracted and deducted from the original signal. The result showed the less noise intensity and higher signal-to-noise ratio than that without the procedure. After adopting this method, the flaw can be precisely located even under the interference of the undesirable modes.


全文掲載のPDFファイルダウンロード