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A Novel Spectroscopy-Based Method Using Monopole Antenna for Measuring Soil Water Content
Measurement ( IF 5.6 ) Pub Date : 2020-09-17 , DOI: 10.1016/j.measurement.2020.108459
Ming Li , Ko-Wen Jwo , Weidong Yi

Soil water content measurement is indispensable to precision agriculture. A novel soil water content measuring method based on frequency scanning is proposed in this research. The measuring system consists of a monopole antenna to emit and receive electromagnetic waves as well as a network analyzer. The soil equivalent circuit model is presented and its spectroscopy is obtained by comparing incident and reflected waves. The results indicate that the resonance frequency shifts towards the low frequency region as soil moisture increases, therefore soil water content can be obtained simply by detecting resonance frequency. The linear fitting curve has a determination coefficient of 0.9834 and a root mean square error of 1.4%. The measuring range from 5.0% to 37.4% is wide enough for actual agricultural production. The method offers a productive solution for soil water content measurement and provides an idea to sense other soil characteristics.



中文翻译:

基于光谱的单极天线测量土壤含水量的新方法

土壤水分含量的测量对于精密农业是必不可少的。提出了一种基于频率扫描的土壤水分测量新方法。该测量系统由一个用于发射和接收电磁波的单极天线以及一个网络分析仪组成。提出了土壤等效电路模型,并通过比较入射波和反射波获得了其光谱。结果表明,随着土壤水分的增加,共振频率向低频区域移动,因此通过检测共振频率可以简单地获得土壤含水量。线性拟合曲线的测定系数为0.9834,均方根误差为1.4%。测量范围从5.0%到37.4%足够用于实际的农业生产。

更新日期:2020-09-18
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