Evaluation of Plastic Deformation by Thermography Method (1st Report, Effect of Surface Roughness on Thermal Images)

摘要

Infrared thermography (TVS) is a device for conducting thermal radiation pattern from an object into a visible image. We paid attention to heat generation by plastic deformation and discussed the possibility of applying this device to detecting local plastic deformation by thermal video system. In measuring surface temperature distribution by this device, the emissivity is a very important factor of measuring the surface temperature distribution and largely depend upon the surface roughness. In this study, the relation between the emissivity and surface roughness was examined and we discussed the thermal image processing technique of the thermal image obtained by TVS.