Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.
2017
Volume 20
Issue 4
Topic:
Wood Technology
ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Pento¶ K. , £uczycka D. , Wysoczański T. 2017. THE USE OF RELATIVE PERMITTIVITY AND LOSS COEFFICIENT AS PARAMETERS FOR WOOD SPECIES DIFFERENTIATION
DOI:10.30825/5.ejpau.29.2017.20.4, EJPAU 20(4), #02.
Available Online: http://www.ejpau.media.pl/volume20/issue4/abs-02.html

THE USE OF RELATIVE PERMITTIVITY AND LOSS COEFFICIENT AS PARAMETERS FOR WOOD SPECIES DIFFERENTIATION
DOI:10.30825/5.EJPAU.29.2017.20.4

Katarzyna Pento¶, Deta £uczycka, Tobiasz Wysoczański
Institute of Agricultural Engineering, The Faculty of Life Sciences and Technology, Wroc³aw University of Environmental and Life Sciences, Poland

 

ABSTRACT

Electrical and dielectric wood properties are used in many applications. In this work, the complex impedance of seven wood species was measured for frequency range 1 kHz–1 MHz. The measurements were conducted with parallel and perpendicular orientation of the electrical field with respect to specimen visible grain cut from sapwood and heartwood. Based on the complex impedance, values of relative permittivity and loss coefficient were calculated. These parameters of various wood types differs significantly below 10 kHz for relative permittivity and below 200 kHz for loss coefficient. For wood samples classification, the relative permittivity values measured at frequency 5.1 kHz and the loss coefficient values measured at frequency 110 kHz were used in this work. Three different classification methods were employed for clustering. Results show that relative permittivity looks more promising parameter for wood species differentiation.

Key words: dielectric wood properties, relative permittivity, loss coefficient, clustering, wood classification.

Katarzyna Pento¶
Institute of Agricultural Engineering, The Faculty of Life Sciences and Technology, Wroc³aw University of Environmental and Life Sciences, Poland
ul. J. Che³mońskiego 37/41
51-630 Wroc³aw
Poland
email: katarzyna.pentos@upwr.edu.pl

Deta £uczycka
Institute of Agricultural Engineering, The Faculty of Life Sciences and Technology, Wroc³aw University of Environmental and Life Sciences, Poland
ul. J. Che³mońskiego 37/41
51-630 Wroc³aw
Poland
email: deta.luczycka@upwr.edu.pl

Tobiasz Wysoczański
Institute of Agricultural Engineering, The Faculty of Life Sciences and Technology, Wroc³aw University of Environmental and Life Sciences, Poland
ul. J. Che³mońskiego 37/41
51-630 Wroc³aw
Poland

Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.

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