Difficulties Associated with the Acoustic Source Localization in Anisotropic Plates and its Solution

摘要

Acoustic source localization technique for anisotropic plates proposed by theauthors in an earlier publication is applied here to a carbon fiber composite laminate.Difficulties associated with this technique are investigated. It is noted that the accuracyof this technique depends strongly on the accuracy of the measurement of the timedelays in recorded signals by three receiving sensors placed in close proximity in thesensor cluster. The sensor cluster is needed to obtain the direction of the acousticsource without knowing the material properties of the plate. It is proposed here that toobtain the accurate time delays not the full time histories but only the beginning partof every time history (the first dip and peak) should be taken for the subsequent stepsof signal processing. With these modifications improved predictions are obtained.