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One common and traditional method of detecting stored-grain deterioration is by measuring grain temperature. The key to stored-grain temperature measurement by acoustic method is acoustic travel-time measurement. In this paper, a phase transform generalized cross correlation with wavelet transform (WT-PHAT-GCC) method for acoustic travel-time measurement is proposed. An experimental system of acoustic...
The key for acoustic temperature field measurement is to measure acoustic travel-time accurately. Restricted by sample interval, the acoustic travel-time estimation accuracy by fast correlating of the transmitted and the received signals is not high enough. A new method based on fast correlation combined with up-sampling is proposed. Ideal anti-imaging filters are implemented in frequency domain....
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