2方向励磁型渦電流探傷プローブによる傷形状の推定評価

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2018/10/01

タイトル(英語): Estimation of Crack Shape with Two-way Excitation Eddy Current Testing Probe

著者名: 長谷川　諒（滋賀県立大学），福岡　克弘（滋賀県立大学）

著者名(英語): Ryo Hasegawa (The University of Shiga Prefecture), Katsuhiro Fukuoka (The University of Shiga Prefecture)

キーワード: 渦電流探傷試験，ばね鋼，磁気飽和，微小傷，有限要素法解析，傷形状推定　　eddy current testing，spring steel，magnetic saturation，microcrack，finite element method (FEM) analysis，crack shape estimation

要約(英語): Eddy current testing (ECT) system for the spring steel materials that is able to estimate crack shape was developed. Inspection signal of spring steel material is affected by the permeability distribution about its surface. Then the magnetizer that reduce variability of permeability and the pancake probe that grasps regional states of spring steel material were introduced to the system. It was confirmed thereby that this probe is able to detect depth 50 μm crack with a sufficient S/N ratio. Exciting coil that generates two-way direction eddy current was developed and average depth and outline of cross-sectional shape were estimated by its inspection signals. Then the method of estimating crack shape was developed, which has feature that integrates two results by different direction eddy current. In addition, the validity of the method was confirmed by evaluating relationship between crack shapes and calculated inspection results with finite element method (FEM) analysis.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.138 No.10 （2018）

本誌掲載ページ: 505-511 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/138/10/138_505/_article/-char/ja/