农机化研究Issue(12)：74-78,5.
土壤 FDR 探头电场模拟及测量敏感区域分析
Soil FDR Probe Electric Field Simulation and Measurement Sensitive Area
摘要
Abstract
The structure of FDR sensor probe has a great influence on soil moisture content measurement , and can not be ignored as one of important factors .In order to research electromagnetic field distribution in different probe structure , provide a theoretical method for sensor design , the probe electromagnetic field are simulated under different structure in this paper through numerical analysis .The optimal structure of probe design method and measurement sensitive area are be determined by the numerical analysis method .Matlab PDE toolbox was be used for simulating four different structure probe electromagnetic field .the 7 pin structure of the sensor probe was be determined as the best structure .Through the 7 pin probe electromagnetic field calculation , identified by a e-1 times field intensity attenuation , 0 .48 r was as the sensi-tive area for water content measurement .The aera of central needle is very important for the soil water content accurate measurement to FDR probe .We should pay attention to the choice of measuring point position and the size of the area in the process of installing the FDR probe .关键词
土壤/电磁模拟/FDR/测量敏感区Key words
soil/electromagnetic simulation/FDR/The sensitive area of measurement分类
农业科技引用本文复制引用
许景辉,何建强,马孝义..土壤 FDR 探头电场模拟及测量敏感区域分析[J].农机化研究,2014,(12):74-78,5.基金项目
国家自然科学基金项目（51309193）；陕西省农业攻关项目（2012K02-15）；西北农林科技大学基本科研业务专项 （）
