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Density measurements in Pinus sylvestris sawlogs combining X-rayand three-dimensional scanning
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknologi.
2010 (engelsk)Inngår i: Scandinavian Journal of Forest Research, ISSN 0282-7581, E-ISSN 1651-1891, Vol. 25, nr 5, s. 470-481Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Wood density is an important quality variable, closely related to the mechanical properties of the wood. Precise wood density measurements in the log sorting would enable density sorting of logs for products such as strength-graded wood and fingerjointed wood. Density sorting of logs would also give more homogeneous drying properties and thus improve the quality of the final products. By compensating the radiographs from an X-ray log scanner for the varying path lengths using outer shape data from a three-dimensional (3D) scanner, it is possible to make precise estimates of both green and dry density. Measurements on simulated industrial data were compared with densities measured in computed tomographic (CT) images for 560 Scots pine (Pinus sylvestris L.) logs. It was found that green sapwood density could be measured with predictability R2 = 0.65 and root mean square error (RMSE) of 25 kg m-3. Green and dry heartwood densities were measured with similar precision: R2 = 0.79 and RMSE = 32 kg m-3 for green density and R2 = 0.83 and RMSE = 32 kg m-3 for dry density.

sted, utgiver, år, opplag, sider
2010. Vol. 25, nr 5, s. 470-481
HSV kategori
Forskningsprogram
Träteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-13057DOI: 10.1080/02827581.2010.509326ISI: 000282594700009Scopus ID: 2-s2.0-77955258875Lokal ID: c3738820-dcee-11df-8b36-000ea68e967bOAI: oai:DiVA.org:ltu-13057DiVA, id: diva2:986008
Merknad
Validerad; 2010; 20101021 (ysko)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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