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Using 2-D Arrays for Sensing Multimodal Lamb Waves
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Signals and Systems Group.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Signals and Systems Group.
2010 (English)In: Conference on Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2010 San Diego, CA, MAR 08-11, 2010 / [ed] Shull PJ, Diaz AA, Wu AF, 2010, Vol. 7649Conference paper, Published paper (Refereed)
Abstract [en]

Monitoring structural integrity of large planar structures requires normally a relatively dense network of uniformly distributed ultrasonic sensors. A 2-D ultrasonic phased array with all azimuth angle coverage would be extremely useful for the structural health monitoring (SHM) of such structures. Known techniques for estimating direction of arriving (DOA) waves cannot efficiently cope with dispersive and multimodal Lamb waves (LWs). In the paper we propose an adaptive spectral estimation technique capable of handling broadband LWs sensed by 2-D arrays, the modified Capon method. Performance of the technique is evaluated using simulated multiple-mode LWs, and verified using experimental data.

Place, publisher, year, edition, pages
2010. Vol. 7649
Series
Proceedings of SPIE-The International Society for Optical Engineering, ISSN 0277-786X ; 7649
Keyword [en]
structural health monitoring, phased arrays, beamforming
National Category
Signal Processing
Research subject
Electrical Engineering with specialization in Signal Processing
Identifiers
URN: urn:nbn:se:uu:diva-148148DOI: 10.1117/12.847607ISI: 000285543200025ISBN: 978-0-8194-8064-4 (print)OAI: oai:DiVA.org:uu-148148DiVA: diva2:401416
Conference
Conference on Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2010 San Diego, CA, MAR 08-11, 2010
Available from: 2011-03-02 Created: 2011-03-02 Last updated: 2016-04-19Bibliographically approved

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Engholm, MarcusStepinski, Tadeusz

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