A Generic Technique for Acoustic Emission Source Location

JJ Scholey, PD Wilcox, MR Wisnom, MI Friswell, M Pavier (Bristol University) & MR Aliha (Iran University of Science and Technology)

Journal of Acoustic Emission, Vol. 27, 2009, pp. 291-298

Abstract

Acoustic emission (AE) source location is an essential part of any quantitative AE test as it provides information about damage mechanisms and allows spatial separation so that signals from unwanted sources can be eliminated. In this paper, an AE source location technique described as the best-matched point search method is presented. The application of the bestmatched point search method is demonstrated in two source location experiments: one on a large anisotropic carbon-fibre composite (CFC) plate and one on a thick oolitic limestone disc. In the large composite plate test, source location is achieved using the S0 mode, which displays a complicated group velocity pattern. In the oolitic limestone experiment, three-dimensional source location is demonstrated. The best-matched point search method successfully determines the location of AE sources in both tests. Errors in source location are attributed to the extraction of delta-t times from the AE signals.

Paper Availability

This material has been published in the Journal of Acoustic Emission, Vol. 27, 2009, pp. 291-298, the only definitive repository of the content that has been certified and accepted after peer review. Copyright and all rights therein are retained by the journal.


Journal of Acoustic Emission