| 摘要 |
PROBLEM TO BE SOLVED: To enable a shape and a depth of a damaged part inside a structure to be determined exactly, in order to accurately determine whether or not a hammering-sound investigation should be carried out, and to determine the priority of the hammering-sound investigation for each point. SOLUTION: An object portion to be investigated 21 is photographed by an infrared camera, for example, and then a temperature sequential line graph is created from an infrared image acquired from a result of the photographing. Then, a shape of a temperature distribution coinciding with the temperature sequential line graph is determined, and a damage pattern which corresponds to the shape of the temperature distribution (for example, the shape is a "bell type", and the gradient is "ten or more"), is determined to be an actual damaged state of the object portion to be investigated 21, thereby enabling not only the depth and shape of the actual damaged part 2 to be recognized from the damage pattern, but also the priority of the hammering-sound investigation to be determined accurately from a correspondence relation between the damage pattern and the priority of the hammering-sound investigation. COPYRIGHT: (C)2008,JPO&INPIT
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