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

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.

  Info
Periodical
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
Pages
1141-1144
DOI
10.4028/www.scientific.net/KEM.334-335.1141
Citation
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
Price
US$ 28,-
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