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STRENGTH GRADING AND PREDICTION OF SHAPE STABILITY BY USE OF OPTICAL AND LASER-BASED SCANNING TECHNIQUES
Linnaeus University, Faculty of Science and Engineering, School of Engineering. (Träbygg)
2010 (English)In: [1]     WCTE 2010, World Conference on Timber Engineering, 2010, 2010, p. 6-Conference paper, Published paper (Refereed)
Abstract [en]

ABSTRACT: The paper assesses the potential of quality sorting of timber by use of modern scanning techniques, employing both fluorescent lighting and lighting from a large number of laser point sources. Tests were performed using wood-scanning equipment from one of its major manufactures. The results appear promising, especially in providing reasonably accurate predictions of grain-angle distributions on the wood surfaces, as well as rather accurate descriptions of knot locations and of fibre-angle disturbances around knots. A close characterization of end cross sections with respect to radial and tangential directions alike and of annual ring widths was also obtained. Characterization of the growth of annual rings in early to late wood was rather successful too. The techniques employed are illustrated by results of ongoing studies of both planed boards and of glued laminated beams.

Place, publisher, year, edition, pages
2010. p. 6-
Keywords [en]
wood, structural timber, scanning, optical- and laser-based methods, grading, stiffness, shape stability
National Category
Building Technologies
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
URN: urn:nbn:se:lnu:diva-7037OAI: oai:DiVA.org:lnu-7037DiVA, id: diva2:337787
Conference
World Conference on Timber Engineering
Available from: 2010-08-09 Created: 2010-08-09 Last updated: 2011-04-04Bibliographically approved

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Petersson, Hans

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