114 コンクリート表面の赤外線サーモグラフィの逆解析による欠陥検出(セッション4 評価・診断IV) [in Japanese] 114 Inverse Analysis of Infrared Thermography of Concrete Surface for Detection of Embedded Defects [in Japanese]
Access this Article
In this paper, a method to identify the geometrical shape and the location of the defect embedded in a concrete structure by processing the thermal image of the structural surface acquired by infrared thermography is presented. In the proposed method, the structure is modeled as a homogeneous infinite plate whose boundary condition on the observed surface is known. A layer-by-layer inverse analysis using a regularized interlayer transfer matrix based on 2D Fourier transform is carried out to obtain the sharper image of the defect as well as the depth of the damaged layer. The estimated depth information mapped on the image plane has resulted in a "depth image" which can display the shape of the defects as well as their depth simultaneously. The effectiveness of the proposed technique has been examined both numerically and experimentally.
- The Proceedings of the Symposium on Evaluation and Diagnosis
The Proceedings of the Symposium on Evaluation and Diagnosis 2007.6(0), 61-64, 2007
The Japan Society of Mechanical Engineers