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

Chunhui Yang, Zhongqing Su, Lin Ye, Li Min Zhou, Peter Hodgson

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

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.
Original languageEnglish
Pages (from-to)1141-1144
Number of pages4
JournalKey Engineering Materials
Volume334-335 II
Publication statusPublished - 21 Feb 2007

Keywords

  • Damage identification
  • Signal processing
  • Structural health monitoring
  • Time of flight
  • Wave propagation
  • Wavelet transform

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemical Engineering (miscellaneous)

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