Singular value decomposition for novelty detection in ultrasonic pipe monitoring

Chang Liu; Joel B. Harley; Yujie Ying; Irving J. Oppenheim; Mario Bergés; David W. Greve; James H. Garrett Jr.

doi:10.1117/12.2009891

19 April 2013 Singular value decomposition for novelty detection in ultrasonic pipe monitoring

Chang Liu, Joel B. Harley, Yujie Ying, Irving J. Oppenheim, Mario Bergés, David W. Greve, James H. Garrett Jr.

Proceedings Volume 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013; 86921R (2013) https://doi.org/10.1117/12.2009891
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2013, San Diego, California, United States

Abstract

Guided wave ultrasonics is an attractive technique for structural health monitoring, especially on pressurized pipes. However, civil infrastructure components, including pipes, are often subject to large environmental and operational variations that prevent traditional baseline subtraction-based approaches from detecting damage. We collect ultrasonic data on a large-scale pipe segment in its normal operating conditions and observe large environmental variations. We developed a damage detection method based on singular value decomposition (SVD) that is robust to those benign variations. We further develop an online novelty detection framework based on our SVD method to detect the presence of a mass scatterer on the pipe at the same time that we collect the data. We examine the framework with both synthetic simulations and field experimental data. The results show that the framework can effectively detect the presence of a scatterer and is robust to large environmental and operational variations.

Citation Download Citation

Chang Liu, Joel B. Harley, Yujie Ying, Irving J. Oppenheim, Mario Bergés, David W. Greve, and James H. Garrett Jr. "Singular value decomposition for novelty detection in ultrasonic pipe monitoring", Proc. SPIE 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013, 86921R (19 April 2013); https://doi.org/10.1117/12.2009891

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