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Air-coupled detection of the S1-ZGV lamb mode in a concrete plate based on backward wave propagation
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.ORCID iD: 0000-0002-5665-8288
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.
2013 (English)In: Review Of Progress In Quantitative Nondestructive Evaluation, Vols 32a And 32b, American Institute of Physics (AIP), 2013, 1294-1300 p.Conference paper, Published paper (Refereed)
Abstract [en]

Impact Echo is commonly used to determine thickness of concrete plate like structures. The method is based on the generation and detection of the plate thickness resonance frequency, where the group velocity of the first higher symmetric Lamb mode goes to zero (S1-ZGV). When using air-coupled microphones as receivers it is hard to determine the correct resonance frequency due to low signal to noise ratio. In this study multichannel signal processing is used to identify the S1-ZGV frequency, based on backward wave propagation instead of the conventional amplitude spectrum approach.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2013. 1294-1300 p.
Series
AIP Conference Proceedings, ISSN 0094-243X ; 1511
Keyword [en]
Impact Echo, Lamb Waves, S1-ZGV, Backward Wave Propagation, Negative Phase Velocity
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:kth:diva-124396DOI: 10.1063/1.4789192ISI: 000320452600166ISBN: 978-0-7354-1129-6 (print)OAI: oai:DiVA.org:kth-124396DiVA: diva2:635002
Conference
39th Annual Review of Progress in Quantative Nondestructive Evaluation (QNDE), Denver, CO, Jul 15-20, 2012
Note

QC 20130702

Available from: 2013-07-02 Created: 2013-07-02 Last updated: 2013-08-15Bibliographically approved

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Bjurström, Henrik

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
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  • asciidoc
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