Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Sapwood moisture content measurements in Scots Pine sawlogs combining X-ray and 3D scanning
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknologi.
2010 (Engelska)Ingår i: Proceedings, 11th International IUFRO Wood Drying Conference: [... in Skellefteå, Sweden, January 18 - 22, 2010 ... the theme of the conference was "Recent Advances in the Field of Wood Drying"] / [ed] Tom Morén; Lena Antti; Margot Sehlstedt-Persson, Luleå: Luleå tekniska universitet, 2010, s. 357-362Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Wood industry of today deals with large volumes in an almost automatic process, which is not fully adapted tothe variability of the raw material. Consequently, it is crucial to sort the wood according to material properties inorder to process the wood efficiently and to obtain high quality end products. One material property which could beused for sorting is the moisture content of the sapwood, an important parameter for both the processing and the endproducts.Most large Swedish sawmills are using 3D scanners for quality sorting of Scots pine (Pinus sylvestris L.)sawlogs based on outer shape. Recently, some sawmills have also invested in X-ray log scanners in order to sort thesawlogs based on inner properties. It has previously been shown that, by combining raw data from industrial 3D andX-ray log scanners using path length compensation, green sapwood density and dry heartwood density can beestimated.In this study, the dry heartwood density was used to find an estimate of the dry sapwood density, thus allowingthe calculation of the sapwood moisture content. The log scanner data used in this study was simulated from 560Scots pine sawlogs which had previously been scanned in a computed tomography (CT) scanner. The estimatedsapwood moisture contents were then compared to reference values calculated by drying samples to 9% moisturecontent.It was found that the moisture content estimate could be used to separate the logs into two groups with high andlow moisture content, correctly identifying all logs with very low moisture content as dry logs. Out of all logs, 70%were correctly classified. The moisture content estimate could also be compared to the dry density dependentmaximum moisture content and used to identify logs that have actually started to dry.

Ort, förlag, år, upplaga, sidor
Luleå: Luleå tekniska universitet, 2010. s. 357-362
Nationell ämneskategori
Annan maskinteknik
Forskningsämne
Träteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-28117Lokalt ID: 1cd480d0-25f8-11df-be83-000ea68e967bOAI: oai:DiVA.org:ltu-28117DiVA, id: diva2:1001311
Konferens
International IUFRO Wood Drying Conference : 18/01/2010 - 22/01/2010
Anmärkning
Godkänd; 2010; 20100302 (ysko)Tillgänglig från: 2016-09-30 Skapad: 2016-09-30 Senast uppdaterad: 2017-11-25Bibliografiskt granskad

Open Access i DiVA

fulltext(156 kB)85 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 156 kBChecksumma SHA-512
2d0c6c5477b37ef608a08fd73f89a826ab98536e15f65b3b9b27af99df2d145ede6c81df48f7452543667db532742c1f809ad980dc94db104ae7ba3e08796598
Typ fulltextMimetyp application/pdf

Övriga länkar

http://www.ltu.se/ske/wdc2010?l=en

Personposter BETA

Skog, JohanVikberg, TommyOja, Johan

Sök vidare i DiVA

Av författaren/redaktören
Skog, JohanVikberg, TommyOja, Johan
Av organisationen
Träteknologi
Annan maskinteknik

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 85 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 393 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf