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Calibration for frozen/non-frozen conditions when predicting moisture content and density distribution of wood by microwave scanning of sawn timber
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0001-8404-7356
Luleå tekniska universitet.
2004 (English)In: Forest Products Society 58th Annual meeting, Forest Products Society, 2004Conference paper, Meeting abstract (Other academic)
Abstract [en]

This study was carried out in order to investigate the influence of frozen wood when calibrating a prediction model for the moisture content and density distribution of Scots pine (Pinus sylvestris) and birch (Betula pubescens) using microwave sensors. The material was initially of green moisture content, and thereafter dried to zero moisture content. At each step all the pieces were weighed, scanned with a microwave sensor (Satimo 9, 4 GHz), and CT scanned with a medical CT scanner (Siemens Somatom At.T.) at frozen and room temperature conditions. The output variables from the microwave sensor were used as predictors, and CT images correlated with known moisture content, temperature levels, and frozen/non-frozen conditions were used as response variables. Multivariate models to predict average moisture content and density were calibrated using PLS regression. The models for average moisture content and density were applied on mean values for spatially distributed areas and pixel level, and the distribution was visualized. The result shows that it is possible to predict both moisture content distribution and density distribution with high accuracy using microwave sensors, but frozen conditions require calibration.

Place, publisher, year, edition, pages
Forest Products Society, 2004.
National Category
Other Mechanical Engineering
Research subject
Wood Technology
Identifiers
URN: urn:nbn:se:ltu:diva-33121Local ID: 7e885f10-518c-11dc-959a-000ea68e967bOAI: oai:DiVA.org:ltu-33121DiVA, id: diva2:1006357
Conference
Forest Products Society Annual Meeting : 27/06/2004 - 30/06/2004
Note
Godkänd; 2004; 20070823 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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Lundgren, NilsHagman, Olle

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • 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