電気導電率・誘電率・熱伝導率・熱拡散率の計測・可視化技法

抄録

We present our developed effective yet versatile non-destructive estimation techniques for electric and thermal physical parameter distributions, i.e., the synthetic magnetic vector field measurement-based electric conductivity and/or dielectric constant distributions, and the synthetic infrared temperature measurement-based thermal conductivity and/or thermal diffusibility distributions. In the electric and thermal estimations, the same type simultaneous first-order partial differential equations are dealt with, in which measurement errors of magnetic fields and temperature fields/improper configurations of reference regions and externally situated sources are coped with in a novel way by together utilizing computationally efficient a least squares method, a mollification method, and a regularization method. In principle, an arbitrary geometry of the target is dealt with. The feasibilities of our developed techniques are verified through numerical simulations and experiments (target : cupper plates), with resultant estimations indicating that our techniques can be practical means for robustly estimating target electric and thermal parameter distributions. Obviously, this technique will open up new aspects of non-destructive evaluation of various materials/structures (e.g., detection of quench, monitoring of production/growing process, repairing process, etc.) and of non-invasive examination of various living things (e.g., monitoring of pathological state and/or activity including bio-conductive path etc.).