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

Fang Lu; Seichi Okamura

doi:10.1117/12.390667

6 July 2000 Determining moisture content in a broad range of sawdust from microwave transmission measurement using microstrip line

Fang Lu, Seichi Okamura

Author Affiliations +

Proceedings Volume 4129, Subsurface Sensing Technologies and Applications II; (2000) https://doi.org/10.1117/12.390667
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

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 (6 GHz and 9 GHz) on sawdust samples of varying dry densities (0.13 - 0.20 g/cm³) 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%.

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Fang Lu and Seichi Okamura "Determining moisture content in a broad range of sawdust from microwave transmission measurement using microstrip line", Proc. SPIE 4129, Subsurface Sensing Technologies and Applications II, (6 July 2000); https://doi.org/10.1117/12.390667

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