Microwave measurement system of grain moisture content based on microwave resonator

被引：2

作者：

Yang, Ping ^{[1
]}

Yan, Hengming ^{[1
]}

Yu, Wenyi ^{[1
]}

机构：

[1] College of Electric Power, South China University of Technology

来源：

Jixie Gongcheng Xuebao/Chinese Journal of Mechanical Engineering | 2007年 / 43卷 / 01期

关键词：

Fuzzy clustering algorithm; Microwave measurement; Moisture;

D O I：

10.3901/JME.2007.01.229

中图分类号：

学科分类号：

摘要：

A new microwave measurement method for moisture content of grain is proposed. According to this method, a measurement system is designed for grain moisture content continuous measurement. In this system, moisture content can be measured by a specially designed microwave resonator which has a center hole. When grain passes through the center hole, its density and moisture will cause resonant frequency excursion (RFE) and microwave attenuation (MA) of the resonator. Under the same moisture, density is only related to MA. If RFE and MA are detected, we can calculate moisture content of grain, the change of density would not affect the calculating result of moisture content. In order to get high accuracy, a center-certain fuzzy clustering algorithm is proposed. According to the response characteristic of microwave resonator and the fuzzy clustering algorithm, we designed a high accuracy microwave measurement system which can measure grain moisture content in real-time. Experimental results show that the measurement system has high accuracy. Its accuracy is varied from 92 percent to 96 percent in different months.

引用

页码：229 / 234

页数：5

共 4 条

[1] Kraszewski A., Microwave monitoring of moisture content in grain-further considerations, Microwave Power, 23, 4, pp. 236-246, (1998)
[2] Trabelsi S., Kraszewski A.W., Nelson S.O., Determining bulk density of granular materials from microwave measurements of their dielectric properties, IMTC2001, pp. 1887-1892, (2001)
[3] Yang P., Liu S., Microwave measurement system of density and moisture content based on focus fuzzy clustering algorithm, Proceedings of 3rd International Symposium on Instrumentation Science and Technology, pp. 922-928, (2004)
[4] Kim K.B., Kim J.H., Lee S.S., Measurement of grain moisture content using microwave attenuation at 10.5 GHz and moisture density, IEEE Trans. Instrum. Meas., 51, 1, pp. 72-77, (2002)

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