Abstract

Infrared thermography is one of the most attractive techniques for diagnosing various invisible defects included in objects or bodies, because a two-dimensional field of testing targets can be evaluated nondestructively and instantaneously. In this paper, three-dimensional numerical simulation of thermal conduction is performed for the nondestructive diagnosis using infrared rays to confirm the applicability and to establish the diagnostic standard. It is revealed from a series of numerical simulation and image processing that the infrared thermography is useful in diagnosing invisible defects.

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