電磁波群遅延特性を用いた金属管内の異物検出法

カテゴリ: 論文誌(論文単位)

グループ名: 【D】産業応用部門

発行日: 2019/07/01

タイトル(英語): Clog Detection Method in Metal Tubes Using Group Delay Characteristics in Electromagnetic Waves

著者名: 長谷川　勇気（群馬大学大学院理工学府），廣木　星也（群馬大学大学院理工学府），本島　邦行（群馬大学大学院理工学府）

著者名(英語): Yuki Hasegawa (Graduate School of Engineering, Gunma University), Seiya Hiroki (Graduate School of Engineering, Gunma University), Kuniyuki Motojima (Graduate School of Engineering, Gunma University)

キーワード: 欠陥検出，金属管，非破壊検査，電磁波伝搬　　defect detection，metal tube，non destructive inspection (NDI)，electromagnetic wave propagation

要約(英語): In large-scale factories or power plants metal tube clogging sometimes leads to serious accidents. However, metal tube testing for the detection of foreign objects requires a long testing time and considerable effort. Therefore, we proposed an original inspection method of a single metallic tube using electromagnetic wave reflection in the tube. However, for branched tubes, it is difficult to estimate the position of the clog by electromagnetic wave reflection. To evaluate the position of clog in the branched tubes, we proposed a new detection method using the group delay time in electromagnetic waves. The group delay time in electromagnetic waves is slightly affected by the bifurcation area. To verify the new method, the group delay time characteristics were measured in the branched tubes. The position of clog could be easily detected by the proposed method.

本誌: 電気学会論文誌D（産業応用部門誌） Vol.139 No.7 （2019）

本誌掲載ページ: 652-656 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/ieejias/139/7/139_652/_article/-char/ja/