Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Improved log sorting combining X-ray and 3D scanning: a preliminary study
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.
2007 (English)In: Quality control for wood and wood products: COST Action E 53 the first conference, October 15th/17th, 2007, Warsaw, Poland / [ed] Marek Grześkiewicz, Warsaw: Warsaw University of Life Sciences , 2007, 133-140 p.Conference paper, Published paper (Refereed)
Abstract [en]

Quality sorting of sawlogs is becoming more and more common. This is the result of increasing production of customer specific products in combination with high raw material prices. Today, log quality sorting is being based on either 3D or X-ray scanning techniques. Previous research has shown that sorting accuracy is improved when using multivariate models to combine variables from both 3D and X-ray scanners. There is however a potential of further improving the sorting if 3D and X-ray data are combined at an earlier stage; from the measured 3D shape a better estimate of the X-ray path lengths through the log may be found, thus enabling the calculation of a log density profile from the measured X-ray attenuation. The development and evaluation of such a technique is the topic of current research at SP Trätek and Luleå University of Technology in Skellefteå. Preliminary results show that the method is good at calculating large scale properties such as heartwood content and heartwood and sapwood densities. When looking for smaller geometric objects, e. g., knot whorls, extra care must be taken so that observational errors from the 3D scanner do not compromise the X-ray data. Software simulating industrial X-ray scanner data from CT-scanned logs has also been developed. A very good agreement was found between simulated data and actual data from an industrial installation. This underlines that such a simulation tool is very valuable when developing algorithms for industrial X-ray scanners.

Place, publisher, year, edition, pages
Warsaw: Warsaw University of Life Sciences , 2007. 133-140 p.
National Category
Other Mechanical Engineering
Research subject
Wood Technology
Identifiers
URN: urn:nbn:se:ltu:diva-29347Local ID: 2cc54860-c11a-11dd-a054-000ea68e967bISBN: 9788372449047 (print)OAI: oai:DiVA.org:ltu-29347DiVA: diva2:1002570
Conference
Quality control for wood and wood products : Quality Control for Wood and Wood Products 15/10/2007 - 17/10/2007
Note
Godkänd; 2007; 20081203 (ysko)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

Open Access in DiVA

fulltext(708 kB)32 downloads
File information
File name FULLTEXT01.pdfFile size 708 kBChecksum SHA-512
ddbe2c25e8e73738c691b3450e130963ddb66087f0602368d35620c9e4b8b5ad97e98f4ce1a9b29d8c913ff9afcbb6c565ccbf93f169442292d432ac7827393e
Type fulltextMimetype application/pdf

Other links

http://www.coste53.net/

Search in DiVA

By author/editor
Skog, JohanOja, Johan
By organisation
Wood Science and Engineering
Other Mechanical Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 32 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 24 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf