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

Volume

56

Issue

6

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

1207

Lastpage

1217

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;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/TUFFC.2009.1162

Filename

5075103