MINIATURIZED CONTACTLESS SONIC IR DEVICE FOR REMOTE NON-DESTRUCTIVE INSPECTION

摘要

A thermal imaging system (80) for detecting cracks (100) and defects in a component (82). An electro-magnetic acoustic transducer (EMAT) (84) is coupl ed to the component (82), and introduces pulsed sound signals therein. The soun d signals cause the defects (100) to heat up, and IR radiation (98) from the component (82) is detected by a thermal camera. The amplitude of the pulsed signals are substantially constant, and the frequency of the pulsed signal c an be changed within each pulse. A control unit is employed to provide timing a nd control for the operation of the EMAT (84) and the camera.