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Measurement of the Clamping Force Applied by Load-Bearing Bolts Using a Combination of Compression and Shear Ultrasonic Waves
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.ORCID iD: 0000-0002-6216-6132
Swerea KIMAB AB.
2015 (English)In: 2015 IEEE International Ultrasonics Symposium (IUS 2015): Taipei, 21-24 Oct. 2015, Piscataway, NJ: IEEE Communications Society, 2015, article id 7329418Conference paper, Published paper (Refereed)
Abstract [en]

Quantitative measurement of the clamping or tightening force of rods and bolts is important when assessing the structural integrity of various constructions. This paper shows that by using a bi-wave ultrasonic pulse-echo technique, it is possible to determine this tightening force without the need of extensive calibration prior to installing the bolts. We show that the ratio of the time-of-flight (TOF) between the transversal and the longitudinal waves changes linearly with the clamping force and that we only need to know the TOF of the unstrained bolt prior to installment. This is then demonstrated experimentally on a 1.1 m rock bolt, using pulses that propagated 6.6 m. Two different methods for estimation of the TOF ratio are evaluated.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE Communications Society, 2015. article id 7329418
Series
Proceedings - IEEE Ultrasonics Symposium, ISSN 1948-5719
National Category
Signal Processing
Research subject
Signal Processing
Identifiers
URN: urn:nbn:se:ltu:diva-26775DOI: 10.1109/ULTSYM.2015.0079ISI: 000366045700341Scopus ID: 84962007063Local ID: 003caf40-b8ad-4d66-83ef-c1c0fe435609ISBN: 978-1-4799-8182-3 (print)OAI: oai:DiVA.org:ltu-26775DiVA, id: diva2:999955
Conference
IEEE International Ultrasonics Symposium : 21/10/2015 - 24/10/2015
Note
Validerad; 2016; Nivå 1; 20151207 (johanc)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-07-10Bibliographically approved

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Carlson, Johan

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CiteExportLink to record
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Citation style
  • apa
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