Vpliv vlažnosti na dielektrične lastnosti lesa

Abstract

V članku je predstavljen vpliv vlažnosti lesa na dielektrične lastnosti bukovine (Fagus sylvatica L.) in smrekovine (Picea abies L.). Diskastim preskušancem smo pri različnih vlažnostih izmerili dielektrične lastnosti. Meritve smo izvedli pri devetih frekvencah elektromagnetnega polja (2, 3, ...,10 MHz). Vse meritve smo opravili pri sobni temperaturi z impedančnim analizatorjem HP 4191A RF po metodi z mikrometrom, na katerega sta bili pritrjeni diskasti kovinski elektrodi. Ugotovili smo, da dielektrična vrednost narašča z vlažnostjo lesa in pada z višanjem frekvence elektromagnetnega polja.

Keywords

vlažnost lesa;dielektrične lastnosti lesa;visoka frekvenca;

Data

Language:	Slovenian
Year of publishing:	2005
Typology:	1.02 - Review Article
Organization:	UL BF - Biotechnical Faculty
Publisher:	Zveza društev inženirjev in tehnikov gozdarstva in lesarstva Slovenije
UDC:	630*812.159
COBISS:	1326985
ISSN:	0024-1067
Parent publication:	Les
Views:	960
Downloads:	188
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Effect of moisture content on the dielectric properties of wood
Secondary abstract:	In this article, the effect of moisture content on the dielectric properties of beech (Fagus sylvatica L.) and spruce (Picea abies L.) is presented. Dielectric properties of wood disks were measured at different moisture content. Measurements were performed at nine various frequencies of electromagnetic field(2, 3, ..., 10 MHz) and at room temperature, with impedance analyser HP 4191 A RF, using method by a micrometer screw with circular parallel electrodes. It was found out that dielectric constant of wood increases by increasing the moisture content of wood and decreases with increasing of frequency.
Secondary keywords:	moisture content of wood;dielectric properties;high frequency;
URN:	URN:NBN:SI
Type (COBISS):	Not categorized
Pages:	str. 251-253
Volume:	ǂLet. ǂ57
Issue:	ǂšt. ǂ7/8
Chronology:	2005
ID:	1741748