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

Abstract:

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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 et al., "A Signal Processing Approach for Elastic Wave-Based Structural Health Monitoring Using Active Piezoelectrics", Key Engineering Materials, Vols. 334-335, pp. 1141-1144, 2007

Online since:

March 2007

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Price:

$35.00

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