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
Three dimensional knot models based on surface laser scanning
Linnaeus University, Faculty of Technology, Department of Building Technology. (Träbyggnadsteknik)ORCID iD: 0000-0003-4518-570X
Linnaeus University, Faculty of Technology, Department of Building Technology. (Träbyggnadsteknik)
Linnaeus University, Faculty of Technology, Department of Building Technology. (Träbyggnadsteknik)ORCID iD: 0000-0002-8513-0394
2015 (English)In: Proceedings 19th International Nondestructive Testing and Evaluation of Wood Symposium Rio de Janeiro, Brazil, 23-25 September, 2015. / [ed] Ross, Robert J.; Gonçalves, Raquel; Wang, Xiping,, Madison, USA: USDA, Forest Service, Forest Products Laboratory , 2015, Vol. 19, 83-90 p.Conference paper, Published paper (Refereed)
Abstract [en]

Most machine strength grading methods of today result in limited grading accuracy and poor yield in higher strength classes. A new and more accurate grading method utilizing laser scanning technique to determine the in-plane fibre directions on board surfaces was recently approved for the European market. In this, however, no consideration is taken to the out-of-plane direction of the fibres. A first step towards scanning-based 3D models of the fibre orientation is the establishment of 3D knot models. In this investigation laser scanning was used to identify knot surfaces on longitudinal board surfaces. By means of developed algorithms knot surfaces that belonged to the same physical knot visible on different sides of the board were identified. All knots with surface areas larger than 100 mm2 were correctly identified and modeled in 3D. This is a promising starting point for further development of the new grading method based on laser scanning.

Place, publisher, year, edition, pages
Madison, USA: USDA, Forest Service, Forest Products Laboratory , 2015. Vol. 19, 83-90 p.
Series
General Technical Report, FPL-GTR-239
Keyword [en]
structural timber, knots, laser scanning, tracheid effect, local fibre direction, diving angle
National Category
Other Civil Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
URN: urn:nbn:se:lnu:diva-52060OAI: oai:DiVA.org:lnu-52060DiVA: diva2:919276
Conference
19th International Nondestructive Testing and Evaluation of Wood Symposium, Rio de Janeiro, Brazil, 23 -25 September, 2015.
Note

Ej belagd 20160422

Available from: 2016-04-13 Created: 2016-04-13 Last updated: 2016-12-15Bibliographically approved

Open Access in DiVA

fulltext(372 kB)45 downloads
File information
File name FULLTEXT01.pdfFile size 372 kBChecksum SHA-512
09a5407bf948fc64adada4d12e79b664906b915ec150b6338288ceb8eb6305c83276ddd3054a330699cfe9055b5412c010517d86c63e5808fac40f300bfc5e65
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Briggert, AndreasOlsson, AndersOscarsson, Jan
By organisation
Department of Building Technology
Other Civil Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 45 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

urn-nbn

Altmetric score

urn-nbn
Total: 162 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