偏波GB-SARによるコンクリート壁内部損傷の非破壊センシングのための基礎実験

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: 2014/04/01

タイトル(英語): A Fundamental Study on Polarimetric GB-SAR for Non-Destructive Inspection of Internal Damages of Concrete Walls

著者名: 高橋　一徳（東北大学東北アジア研究センター），岡村　菜花（東北大学環境科学研究科），佐藤　源之（東北大学東北アジア研究センター）

著者名(英語): Kazunori Takahashi (Center for Northeast Asian Studies, Tohoku University), Saika Okamura (Graduate School of Environmental Studies, Tohoku University), Motoyuki Sato (Center for Northeast Asian Studies, Tohoku University)

キーワード: 非破壊検査，合成開口レーダ，偏波レーダ，地上設置型合成開口レーダ　　non-destructive inspection (NDI)，synthetic aperture radar (SAR)，radar polarimetry，ground-based synthetic aperture radar (GB-SAR)

要約(英語): Damages on the surfaces of concrete buildings can easily be detected by visual inspection and can be repaired. However, damages inside walls need non-destructive inspection techniques to be detected, located, and identified. There has been a great demand for such techniques particularly after the 3.11 Great East Japan Earthquake. Ground-based synthetic aperture radar (GB-SAR) is a technique that can potentially inspect concrete walls in a non-destructive and non-contacting manner. The paper reports a fundamental experiment with a polarimetric GB-SAR system to detect internal damages of a concrete specimen, which was caused by horizontal loading simulating earthquakes. The results shows that the system does not have enough resolution to visualize individual defects, and the effect of steel rebars installed inside the concrete is so strong that masks week responses. However, polarimetric analysis showed the capability to minimize the effect of rebars by re-arranging polarization basis and to extract week responses. In particular, internal damages could be detected by observing volume scattering component in this experiment.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.134 No.4 （2014） 特集：平成25年基礎・材料・共通部門大会

本誌掲載ページ: 166-172 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/134/4/134_166/_article/-char/ja/