Abstract: This paper proposes a two-dimensional temperature field reconstruction algorithm which simulates the sound propagation path based on the least-squares algorithm. The algorithm uses the sound deflection principle and considers the bending effect of the sound propagation path, simulates the actual sound propagation path by the interpolation method. The simulation results show that the algorithm can correct the curved sound path automatically and reconstruct the temperature field simultaneously. Comparing with the leastsquares algorithm, this algorithm can significantly improve measurement accuracy.

Key words: acoustic temperature measurement, sound path simulation, reconstruction algorithm, sound wave refraction