首页|A study on the relationship between porosity and dielectric constant of wood considering the change of moisture content and frequency
A study on the relationship between porosity and dielectric constant of wood considering the change of moisture content and frequency
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
Walter De Gruyter
Abstract Electromagnetic waves are used in wood inspection and treatment. Three important parameters need to be considered in the application of this method, including moisture content (MC), porosity, and dielectric constant (ε), which affect the effectiveness of application of electromagnetic waves, and these parameters can interact with each other. This study’ elucidated the effect of porosity on the ε of wood at different MCs (absolute dry to saturated) in the frequency (f) range of 1 Hz–107 Hz. The results indicated that the porosity on the ε needs to consider both f and MC. Relationships between porosity and ε of absolute dry wood shows opposite patterns in different f bands. When f ≤ 200 Hz, the porosity was positively correlated with ε. When f > 200 Hz, the porosity was negatively correlated with ε. However, the effect of f on ε with the increased of MC was complicated., Correlations with MC, porosity and ε was not significant when f was low. As f increased, the relationship between MC and ε became linear. The results of this study provide a reference for use of ε to detect wood pore characteristics and MC.
NETL
NSTL
Walter De Gruyter
