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Simultaneous Estimation of Electrical and Thermal Properties of Isotropic Material from the Tone-Burst Eddy Current Thermography (TBET) Time–Temperature Data

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4 Author(s)
Biju, N. ; Dept. of Mech. Eng., Indian Inst. of Technol. Madras, Chennai, India ; Ganesan, N. ; Krishnamurthy, C.V. ; Balasubramaniam, Krishnan

In this paper, an inversion method is proposed to determine simultaneously the electrical and the thermal properties of a given isotropic material from the time-temperature data obtained from tone-burst eddy current thermography (TBET). A multiphysics forward model for computing the surface temperature data was used in a genetic algorithm (GA) based inversion technique to determine the material properties such as electrical conductivity (σ), thermal conductivity (k), density (ρ), and specific heat (Cp) simultaneously. Different trials were carried out initially with simulated temperature data (with and without noise) and then validated with experiments.

Published in:

Magnetics, IEEE Transactions on  (Volume:47 ,  Issue: 9 )

Date of Publication:

Sept. 2011

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