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PLS models for predicting wood properties from microwave measurements based on three dimensional FEM simulations
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknologi.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknologi.ORCID-id: 0000-0002-5869-2236
2007 (engelsk)Inngår i: Proceedings from the Nordic Workshop in Wood Engineering / [ed] Helena Johnsson, Luleå: Luleå tekniska universitet, 2007Konferansepaper, Publicerat paper (Annet vitenskapelig)
Abstract [en]

When electromagnetic waves propagate through wood they will be affected by variations in the dielectric properties. These variations are related to different properties within the wood. Dielectric properties of wood depend on moisture content, density, temperature, grain angle and frequency of the electromagnetic wave. The aim with this study was to use threedimensional finite element modelling (FEM) in combination with multivariate statistics and projection to latent structures (PLS) to develop a prediction model for moisture content and dry basis density in wood. An X-ray computed tomography (CT) scanner was used to detect density and, with that, moisture content in wood. Dielectric properties were calculated within a wood volume and used in the simulation. Different frequencies and directions of the electric field were simulated. Previous studies have shown that this method gives a good description of the interactions between wood and microwaves in two dimensions. The results show that 3D finite element modelling can be used to generate a prediction model for moisture content from microwave scanning. Other properties of wood such as density and grain angle have less influence on the microwaves but might be predicted by further processing of the signal.

sted, utgiver, år, opplag, sider
Luleå: Luleå tekniska universitet, 2007.
Serie
Forskningsrapport / Luleå tekniska universitet, ISSN 1402-1528 ; 2007:06
HSV kategori
Forskningsprogram
Träteknik; Träfysik
Identifikatorer
URN: urn:nbn:se:ltu:diva-32796Lokal ID: 765b7e80-d3c4-11db-b6e3-000ea68e967bOAI: oai:DiVA.org:ltu-32796DiVA, id: diva2:1006030
Konferanse
Nordic Workshop in Wood Engineering : 21/02/2007 - 21/02/2007
Merknad
Godkänd; 2007; 20070316 (ysko)Tilgjengelig fra: 2016-09-30 Laget: 2016-09-30 Sist oppdatert: 2023-09-06bibliografisk kontrollert

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Lundgren, NilsHansson, Lars

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