Location of two simultaneously active continuous acoustic emission sources on an aluminum beam

Abstract

Acoustic emission analysis (AE) is used for characterization and location of developing defects in materials. AE sources often generate a mixture of various statistically independent signals. One difficult problem of AE analysis is the separation and characterization of signal components when the signals from various sources and the way in which the signals were mixed are unknown. Recently, blind source separation (BSS) by independent component analysis (ICA) has been used to solve these problems. The main purpose of this paper is to demonstrate the applicability of ICA to time‐delay estimation of two independent continuous AE sources on an aluminum beam. It is shown that it is possible to estimate time delays by ICA, and thus to locate two independent simultaneously emitted sources.

Citation

Kosel, T. and Grabec, I. (2002), "Location of two simultaneously active continuous acoustic emission sources on an aluminum beam", Aircraft Engineering and Aerospace Technology, Vol. 74 No. 1, pp. 4-8. https://doi.org/10.1108/00022660210414967