リモートフィールド渦電流探傷法による配管外面欠陥検出の高感度化


英字タイトル:
Sensitive Technique for Detecting Outer Defect on Tube with Remote Field Eddy Current Testing
著者:
小林 徳康 Noriyasu KOBAYASHI 長井 敏 Satoshi NAGAI 落合 誠 Makoto OCHIAI 神保 昇 Noboru JIMBO 小舞 正文 Masafumi KOMAI
発刊日:
公開日:
カテゴリ: 第5回
キーワードタグ:

概要

In the remote field eddy current testing, we proposed the method of enhancing the magnetic flux density in the vicinity of an exciter coil by controlling the ma gnetic flux direction for increasing the sensitivity of detecting outer defects on a tube and used the flux guide made of a magnetic material for the method. T he optimum structural shape of the flux guide was designed by the magnetic field analysis. On the experiment with the application of the flux guide, the magneti c flux density increased by 59 % and the artificial defect detection signal became clear. We confirmed the proposed method was effective in a high sensitivity.


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