Spot Weld Inspections Using Active Thermography

Spot welds have a significant part in the creation of automotive vehicles. Since integrity of, for example, car, is dependent on performance multiple welds, it important to ensure quality each spot weld. Several attempts been made order determine but most them do not focus applicability manufacturing process. weld inspections are often performed using back heating. However, during manufacturing, robotic desired, and since bodywork car complex shape, accessibility from inside vehicle minor. Therefore, front heating more suitable. In this manuscript, excitation methods compared as well different post-processing techniques. The used techniques can be divided into light inductive Light further lock-in thermography pulse thermography. principle component analysis fast Fourier transform. Inductive turns out suitable measurement technique Both investigated deliver information, such relief images information internal structure