| 双针结构土壤水分传感器探针最优长度分析与试验 |
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| 引用本文： | 赵燕东,聂铭君.双针结构土壤水分传感器探针最优长度分析与试验[J].农业机械学报,2011,42(11):39-43. |
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| 作者姓名： | 赵燕东 聂铭君 |
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| 作者单位： | 北京林业大学工学院,北京,100083 |
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| 基金项目： | 林业公益行业科研专项（200704040）;国家自然科学基金资助项目 （30671715）;北京市教育委员会共建项目建设计划科学研究与科研基地建设项目（2008） |
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| 摘 要： | 在两针平行式探针结构的阻抗模型的基础上,进一步理论推导了终端开路式和终端短路式两种类型土壤水分传感器探针长度与阻抗特性的关系.借助高频分析软件HFSS确定了两针平行式土壤水分传感器的最佳探针结构,并采用有机溶液模拟土壤体积含水率进行了试验,试验结果表明:终端开路式和终端短路式土壤水分传感器探针长度在0 ～8.3 cm时,其土壤体积含水率测量范围达到0～100％.
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| 关 键 词： | 土壤水分 传感器 探针长度 阻抗特性 |
Optimal Analysis for Determining the Dual-pin Length of Soil Moisture Probe |
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| Zhao Yandong and Nie Mingjun.Optimal Analysis for Determining the Dual-pin Length of Soil Moisture Probe[J].Transactions of the Chinese Society of Agricultural Machinery,2011,42(11):39-43. |
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| Authors: | Zhao Yandong and Nie Mingjun |
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| Institution: | Beijing Forestry University;Beijing Forestry University |
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| Abstract: | A detailed analysis was provided based on the port impedance theory. The relationship between probe length and impedance characteristics of soil moisture sensors as terminal open or terminal short was deduced. With the aim to verify the theoretical conclusion, the simulation method by using high frequency structure simulator software (HFSS) and the experiment associated with several organic solutions as references of known dielectric constants were conducted. After a number of experiments, the result showed that the measuring range of soil moisture sensors as terminal open or terminal short, when probe length was within 0~8.3cm, could be up to 0~100%. |
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| Keywords: | Soil water content Sensor Length of probe Impedance characteristic |
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