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A signal processing approach for elastic wave-based structural health monitoring using active piezoelectrics

journal contribution
posted on 2007-03-15, 00:00 authored by Chunhui Yang, Z Su, L Ye, L Zhou, Peter HodgsonPeter Hodgson
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.

History

Journal

Key engineering materials

Volume

334-335

Pagination

1141 - 1144

Publisher

Trans Tech Publications

Location

Aedermannsdorf, Switzerland

ISSN

1013-9826

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2007, Trans Tech Publications