Effect of soft rot and bacteria on electrical impedance of wood at low moisture content

M. Tiitta, T. Repo, Hannu Viitanen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

A complex nonlinear-modelling-based electrical impedance spectroscopy (EIS) for the analysis of decay (soft rot and bacteria) in wood was introduced. Small wood specimens (5 x 10 x 100 mm) including three degrees of decay (control and two decay conditions) were measured by impedance spectroscopy at frequencies between 80 Hz and 1 MHz. The effect of decay on impedance was studied by EIS-modelling and constant frequency parameter analysis at two different moisture content levels below fibre saturation point. Two ZC-circuits in series were used in modelling. The distribution parameter v(1) of the double ZC-model decreased with increasing decay, the reduced values of the distribution parameter were affected by the increased variability in the wood cell structure. The effect of decay on constant frequency parameters was neglible compared to the moisture content effect. Thus, it was possible to estimate both decay condition and moisture content level of each specimen by combined method of EIS-modelling and constant frequency parameter analysis.
Original languageEnglish
Pages (from-to)271-287
Number of pages17
JournalMaterial und Organismen
Volume33
Issue number4
Publication statusPublished - 2001
MoE publication typeA1 Journal article-refereed

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Dielectric Spectroscopy
impedance
Electric Impedance
dielectric spectroscopy
deterioration
Bacteria
water content
bacteria
fiber saturation
cell structures

Cite this

Tiitta, M. ; Repo, T. ; Viitanen, Hannu. / Effect of soft rot and bacteria on electrical impedance of wood at low moisture content. In: Material und Organismen. 2001 ; Vol. 33, No. 4. pp. 271-287.
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abstract = "A complex nonlinear-modelling-based electrical impedance spectroscopy (EIS) for the analysis of decay (soft rot and bacteria) in wood was introduced. Small wood specimens (5 x 10 x 100 mm) including three degrees of decay (control and two decay conditions) were measured by impedance spectroscopy at frequencies between 80 Hz and 1 MHz. The effect of decay on impedance was studied by EIS-modelling and constant frequency parameter analysis at two different moisture content levels below fibre saturation point. Two ZC-circuits in series were used in modelling. The distribution parameter v(1) of the double ZC-model decreased with increasing decay, the reduced values of the distribution parameter were affected by the increased variability in the wood cell structure. The effect of decay on constant frequency parameters was neglible compared to the moisture content effect. Thus, it was possible to estimate both decay condition and moisture content level of each specimen by combined method of EIS-modelling and constant frequency parameter analysis.",
author = "M. Tiitta and T. Repo and Hannu Viitanen",
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Effect of soft rot and bacteria on electrical impedance of wood at low moisture content. / Tiitta, M.; Repo, T.; Viitanen, Hannu.

In: Material und Organismen, Vol. 33, No. 4, 2001, p. 271-287.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of soft rot and bacteria on electrical impedance of wood at low moisture content

AU - Tiitta, M.

AU - Repo, T.

AU - Viitanen, Hannu

N1 - Project code: R8SU00670

PY - 2001

Y1 - 2001

N2 - A complex nonlinear-modelling-based electrical impedance spectroscopy (EIS) for the analysis of decay (soft rot and bacteria) in wood was introduced. Small wood specimens (5 x 10 x 100 mm) including three degrees of decay (control and two decay conditions) were measured by impedance spectroscopy at frequencies between 80 Hz and 1 MHz. The effect of decay on impedance was studied by EIS-modelling and constant frequency parameter analysis at two different moisture content levels below fibre saturation point. Two ZC-circuits in series were used in modelling. The distribution parameter v(1) of the double ZC-model decreased with increasing decay, the reduced values of the distribution parameter were affected by the increased variability in the wood cell structure. The effect of decay on constant frequency parameters was neglible compared to the moisture content effect. Thus, it was possible to estimate both decay condition and moisture content level of each specimen by combined method of EIS-modelling and constant frequency parameter analysis.

AB - A complex nonlinear-modelling-based electrical impedance spectroscopy (EIS) for the analysis of decay (soft rot and bacteria) in wood was introduced. Small wood specimens (5 x 10 x 100 mm) including three degrees of decay (control and two decay conditions) were measured by impedance spectroscopy at frequencies between 80 Hz and 1 MHz. The effect of decay on impedance was studied by EIS-modelling and constant frequency parameter analysis at two different moisture content levels below fibre saturation point. Two ZC-circuits in series were used in modelling. The distribution parameter v(1) of the double ZC-model decreased with increasing decay, the reduced values of the distribution parameter were affected by the increased variability in the wood cell structure. The effect of decay on constant frequency parameters was neglible compared to the moisture content effect. Thus, it was possible to estimate both decay condition and moisture content level of each specimen by combined method of EIS-modelling and constant frequency parameter analysis.

M3 - Article

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JF - Material und Organismen

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