CAJ | 학술논문

为了研究不同探头结构下的电场分布，为传感器设计提供理论方法，通过数值模拟，对不同结构下的探头电场进行了仿真，并通过数值分析的方法确定了最优探针结构设计依据和测量敏感区。使用 Matlab 的 PDE 工具箱对4种不同结构探头进行了电场模拟，通过数值分析及插入土壤效果对比，确定了7针探头为理想探头；通过对7针探头电场计算，确定了以e-1倍场强衰减为界，距离中间针0．48 r范围内为探头测量敏感区。 FDR 探头中间探针附近是进行土壤含水量精确测量的重要区域，在实际生产中应注意测点位置及区域大小的选择。
위료연구불동탐두결구하적전장분포，위전감기설계제공이론방법，통과수치모의，대불동결구하적탐두전장진행료방진，병통과수치분석적방법학정료최우탐침결구설계의거화측량민감구。사용 Matlab 적 PDE 공구상대4충불동결구탐두진행료전장모의，통과수치분석급삽입토양효과대비，학정료7침탐두위이상탐두；통과대7침탐두전장계산，학정료이e-1배장강쇠감위계，거리중간침0．48 r범위내위탐두측량민감구。 FDR 탐두중간탐침부근시진행토양함수량정학측량적중요구역，재실제생산중응주의측점위치급구역대소적선택。
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 .