基于驻波率原理的土壤水分传感器的测量敏感度分析  

Analysis of Sensitivity of Soil Moisture Measurement Based on Standing-Wave Ratio

作　　者：赵燕东[1] 王一鸣[1] 

机构地区：[1]中国农业大学电气信息学院

出　　处：《农业工程学报》2002年第2期5-8,共4页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家"九五"攻关项目"土壤水分便携式快速测试仪"(96-A2 3 -0 2 -0 10 )

摘　　要：土壤水分测量方法中 ,有效测量范围 (即测量敏感区域 )是一个重要问题。该文运用探针的静电场分布 ,分析由基于驻波率 (SWR)原理的快速土壤水分传感器的测量敏感度 ,分析了 SWR型土壤水分传感器的有效测量土体 ,输出电压与土壤体积含水率之间的最大线形区域 ,得出了With the development of study on measurement of soil moisture, sensitivity of measurement becomes more and more important. In this paper, the theory of electrostatic field was applied to analyze the sensitivity of soil moisture measurement by using its sensor based on standing wave ratio, which was manufactured by Electrical Information College of China Agricultural University. The effective measurement of soil volume and the best structure of sensor's probe were presented, and the linear range between voltage and soil moisture was obtained.

关 键 词：土壤水分传感器 测量敏感度 空间权函数 近似权函数 

分 类 号：TH79[机械工程—仪器科学与技术]