The effect of frequency and temperature on dielectric properties of wood with high moisture content
The effect of frequency and temperature on dielectric properties of wood with high moisture content
复制标题
频率和温度对高含水率木材介电性能的影响
DOI：
10.1515/hf-2022-0105
复制
发表时间：
2023-01
期刊：
影响因子：
2.4
通讯作者：
Nengzhi Chen
中科院分区：
文献类型：
--
作者：
Ruixia Qin;Huadong Xu;Yanbo Hu;Liming Zhao;Nengzhi Chen
Abstract. Dielectric sensors are a popular choice for determining wood moisture content. However, the output of these devices, especially when measuring high moisture content, may be significantly affected by the moisture content itself, by sensor frequency (f) and by environmental temperature (T). This study investigated the effect mechanism of f and T on dielectric properties of wood with different moisture contents. Dielectric constant (ε) and dielectric loss factor (tan δ) for Populus nigra, Tilia tuan, Abies fabri and Fraxinus mandshurica wood samples of various moisture contents were measured from 1 to 107Hz and from– 40 to 25°C. The results show that wood ε increases with increasing moisture content and temperature, and decreases with increasing f. The dielectric constant depends significantly on f when T exceeds 6°C, the rate of ε decreases with increasing f. At room temperature, tan δ of wood with moisture content >50% were not related, and peaked between 103 and 104Hz. The change of tan δ with T is complex. The results provide a basis for in-depth research on the dielectric properties of wood with high moisture content and a theoretical basis for the measurement and calibration of the moisture content of standing trees.
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影响因子：
2.4
作者：
徐华东;王立海
通讯作者：
王立海
影响因子：
5.6
作者：
S. Boden;M. Schinker;P. Duncker;H. Spiecker
通讯作者：
S. Boden;M. Schinker;P. Duncker;H. Spiecker
影响因子：
1.6
作者：
M. Tiitta;H. Olkkonen
通讯作者：
M. Tiitta;H. Olkkonen
DOI：
10.1007/978-3-642-77453-9
发表时间：
1993-02
期刊：
--
影响因子：
--
作者：
G. Torgovnikov
通讯作者：
G. Torgovnikov
影响因子：
2.9
作者：
A. Nadler;E. Raveh;U. Yermiyahu;Stephen R. Green
通讯作者：
A. Nadler;E. Raveh;U. Yermiyahu;Stephen R. Green