Structural health monitoring using active sensors and wavelet transforms

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Original languageEnglish
Pages (from-to)363-370
Journal / PublicationProceedings of SPIE - The International Society for Optical Engineering
Issue numberI
Publication statusPublished - 1999
Externally publishedYes


TitleProceedings of the 1999 Smart Structures and Materials - Smart Structures and Integrated Systems
CityNewport Beach, CA, USA
Period1 - 4 March 1999


Health monitoring methods using active sensors (e.g. piezoelectric transducers) and wavelet transforms are being developed in the Department of Mechanical Engineering at the University of South Carolina. In these methods, wave propagation signals are collected using arrays of piezoelectric transducers placed on or embedded in a structure. The collected signals are analyzed using appropriate wavelet transforms. The final interpretation of the sensor signals is based on signal patterns uncovered by the wavelet transforms in correlation with elastic-wave propagation theory. A number of specimens have been instrumented and tested, which include simple steel beams and actual composite aircraft panels. Impact tests simulating low velocity impact by foreign-object have been conducted and will be used to illustrate the wavelet-based methods.