Paper Title:
A Signal Processing Approach for Elastic Wave-Based Structural Health Monitoring Using Active Piezoelectrics

A series of digital frequency filters (DFFs) were designed to screen diverse noises and the spectrographic analysis was conducted to isolate complex boundary reflection, which obscures the damage-induced signals. The scale-averaged wavelet power (SAP) technique was applied to enhance the measurement accuracy of Time of Flight (TOF). As an example, the propagation characteristics of elastic wave in a structural beam of square cross-section were analyzed using such an approach and verified experimentally and numerically, with the consideration of the complicated wave scatter caused by the non-ignorable section dimensions.

Key Engineering Materials (Volumes 334-335)
Edited by
J.K. Kim, D.Z. Wo, L.M. Zhou, H.T. Huang, K.T. Lau and M. Wang
C. H. Yang, Z. Q. Su, L. Ye, L. M. Zhou, P. D. Hodgson, "A Signal Processing Approach for Elastic Wave-Based Structural Health Monitoring Using Active Piezoelectrics", Key Engineering Materials, Vols 334-335, pp. 1141-1144, Mar. 2007
Online since
March 2007
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