Pulsed Infrared Thermography and Inverse Problem for the Equation of Heat Conduction

Abstract

The paper concerns two methods of inverse problem solution for the equation of heat conduction, what allows to determine the thermal diffusivity of the materials using pulsed infrared thermography. Both methods are related to finding the time dependence of the temperature of an infinite plate surface, when opposite surface of the plate was heated by a short heat pulse. This dependence is compared with the time evolution of the temperature of the rear plate surface measured by the means of an infrared (IR) camera. Such comparison allows to extract, from experimental data, the information about thermal diffusivity of the tested material.