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

摘要

Using microstrop 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 were used to obtain the density-independent calibration equation. experimental results for sawdust in moisture range of 10 to 190percent on dry basis are presented. The average error in moisture content determination was 4.65percent.