| 圆筒形电容式粮食水分传感器的数学模型与影响因素分析 |
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| 引用本文： | 蔡利民,孔力.圆筒形电容式粮食水分传感器的数学模型与影响因素分析[J].分析仪器,2009(1). |
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| 作者姓名： | 蔡利民 孔力 |
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| 作者单位： | 1. 华中科技大学控制科学与工程系,武汉,430074;江汉大学物理与信息学院,武汉,430056
2. 华中科技大学控制科学与工程系,武汉,430074 |
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| 摘 要： | 分析了粮食的介质特性,说明了圆筒形电容式粮食水分传感器的测量原理,得出了传感器电容参数与被测粮食含水量关系的数学模型.运用粮食的导电浴盆效应得出了传感器的等效电路,讨论了影响传感器电容量的因素,为圆筒形电容式粮食水分传感器的设计提供了理论依据.
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| 关 键 词： | 粮食水分 导电浴盆效应 电容式传感器 数学模型 |
Mathematical model of cylindrical capacitance grain moisture sensor and analysis of influential factors. |
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| Cai Limin,Kong Li.Mathematical model of cylindrical capacitance grain moisture sensor and analysis of influential factors.[J].Analytical Instrumentation,2009(1). |
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| Authors: | Cai Limin Kong Li |
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| Affiliation: | 1;2;1.Department of Control Science and Engineering;Huazhong University of Science and Technology;Wuhan;430074;2.School of Physics and Information Engineering;Jianghan Universiyt;430056 |
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| Abstract: | The dielectric property of grain is analyzed and the measurement principle of cylindrical capacitance grain moisture sensor is described.A mathematical model reflecting the relationship between the capaci- tance of the sensor and the moisture content of the measured grain is established.The equivalent circuit of the sensor is proposed based on the electric conductivity bathtube effect of grain.The factors that influence the capacitance of the sensor are discussed.The results of the study provide a theoretic... |
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