Estimation of local thermophysical properties of a one-dimensional periodic heterogeneous medium by infrared image processing and volume averaging method

Tile estimation of local thermophysical properties can be of paramount impo rtance in the study of heterogeneous media. The volume averaging method, he re reduced to a one-dimensional line averaging, is used to implement an est imation method of local thermal resistivity field for a stratified medium. The method is tested with experimental transient temperature fields obtaine d with a calibrated stratified sample by an infrared camera. A large number of images are processed at the transient state. The same intrinsic station ary field is estimated from each image. By repeated estimations, this metho d reduces the measurement noise influence.