Abstract
We have developed an experimental and computational hybrid measuring system for the purpose of nondestructive detection of cracks embedded in the structural members. The system consists of an infrared thermal video system (TVS-5000), by which the temperature distribution of a body surface can be measured, and an engineering work station (EWS), by which image processing of the thermal image can be carried out. Various methods for heating or cooling the specimen have been examined. Further more an image-processing expert system has been developed to obtain definite images of the defects.
