Title :
Air-coupled ultrasonic spectroscopy of highly damping materials using pulse compression
Author :
Pallav, Prakash ; Hutchins, David A. ; Yin, Xiaokang
Author_Institution :
Sch. of Eng., Univ. of Warwick, Coventry
fDate :
6/1/2009 12:00:00 AM
Abstract :
Air-coupled ultrasonic spectroscopy is described, whereby the output from a pulse compression system is used. It is demonstrated that the cross-correlation operation used within a pulse-compression system preserves amplitude and phase information. This approach allows the signal-to-noise ratio and, hence, signal-detection capability to be improved by the cross-correlation, while allowing noncontact spectral information for solid samples to be obtained. Results are presented for chocolate samples, where measurements of interest to the food industry have been obtained.
Keywords :
acoustic signal processing; food technology; pulse compression; ultrasonic measurement; air coupled ultrasonic spectroscopy; amplitude information preservation; chocolate samples; cross correlation operation; food industry; food technology; highly damping materials; noncontact spectral information; phase information preservation; pulse compression system output; signal detection capability; Damping; Food industry; Pulse compression methods; Signal to noise ratio; Solids; Spectroscopy; Air; Algorithms; Image Enhancement; Image Interpretation, Computer-Assisted; Materials Testing; Reproducibility of Results; Sensitivity and Specificity; Spectrum Analysis; Ultrasonography; Viscosity;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2009.1162
