
Proceedings Paper
Quantification of environmental compensation strategies for guided wave structural health monitoringFormat | Member Price | Non-Member Price |
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Paper Abstract
The level of post-subtraction noise due to benign structural features limits the sensitivity that guided wave structural
health monitoring systems can achieve. Subtraction of reference signals without compensation leads to unacceptably
high post-subtraction noise in the presence of modest environmental changes, and in particular temperature. Hence some
form of compensation is necessary. In this paper, various compensation strategies are investigated and their performance
quantified. Factors such as the length of time-window considered, sensor variations and inhomogeneous temperature
variations are also addressed. It is concluded that the best performance that can currently be achieved is by (a) obtaining
the best matched signal from an ensemble of multiple reference signals recorded at different temperatures and (b) fine
tuning this signal by numerically stretching or compressing it.
Paper Details
Date Published: 10 April 2008
PDF: 11 pages
Proc. SPIE 6935, Health Monitoring of Structural and Biological Systems 2008, 69350H (10 April 2008); doi: 10.1117/12.776362
Published in SPIE Proceedings Vol. 6935:
Health Monitoring of Structural and Biological Systems 2008
Tribikram Kundu, Editor(s)
PDF: 11 pages
Proc. SPIE 6935, Health Monitoring of Structural and Biological Systems 2008, 69350H (10 April 2008); doi: 10.1117/12.776362
Show Author Affiliations
Anthony J. Croxford, Univ. of Bristol (United Kingdom)
Paul D. Wilcox, Univ. of Bristol (United Kingdom)
Yinghui Lu, Georgia Institute of Technology (United States)
Paul D. Wilcox, Univ. of Bristol (United Kingdom)
Yinghui Lu, Georgia Institute of Technology (United States)
Jennifer Michaels, Georgia Institute of Technology (United States)
Bruce W. Drinkwater, Univ. of Bristol (United Kingdom)
Bruce W. Drinkwater, Univ. of Bristol (United Kingdom)
Published in SPIE Proceedings Vol. 6935:
Health Monitoring of Structural and Biological Systems 2008
Tribikram Kundu, Editor(s)
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