Determining moisture content in a broad range of sawdust from microwave transmission measurement using microstrip line

被引:0
|
作者
Lu, F [1 ]
Okamura, S [1 ]
机构
[1] Shizuoka Univ, Shizuoka 4328561, Japan
关键词
moisture content; microstrip line; microwave; attenuation; phase shift; bulk density;
D O I
10.1117/12.390667
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
Using microstrip line for determining moisture content in a broad range for samples of sawdust is described in this paper. The determination was based on the measurements of the attenuation and phase shift of an electromagnetic wave transmitted through a layer of wet material that is placed onto the microstrip line. The measurements were made at two frequencies (6GHz and 9GHz) on sawdust samples of varying dry densities (0.13-0.20g/cm(3)) at room temperature. The changes of attenuation and phase shift at the two frequencies were used to obtain the density-independent calibration equation Experimental results for sawdust in moisture range of 10 to 190% on dry basis are presented. The average error in moisture content determination was 4.65%.
引用
收藏
页码:82 / 87
页数:6
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