Localization of acoustic-emission sources in objects with small geometric dimensions

Abstract

The problems of the localization of sources of acoustic-emission (AE) signals for objects with small geometric dimensions are considered. The dependence of the localization error for a flaw inside a piezoelectric antenna on the error in determining the difference in the times of signal arrival (DTA) at acoustic transducers was obtained. A method for determining the DTA using wavelet scalograms of AE signals was studied. Experimental studies showed the advantages of this method over the method for determining the rms deviation of AE-signal amplitudes within a “time window.”