Experimental research on crack of conductive component is carried out aiming at carbon fiber reinforced compound materials

ferromagnetic materials and non-ferromagnetic materials. Image edge information acquired by infrared thermal imager and extracted information is incomplete. Put forward an optimization algorithm based on Sobel operator. It is found that the improved algorithm can effectively increase edge recognition capability of crack defects and qualitative analysis on surface crack defects is realized. Temperature distribution rule of defect depth of different materials and eddy heating mode are studied

relationship between different depth of crack and temperature response curve is analyzed. Provide theoretical basis for quantitative analysis of surface crack defects.