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设计了一种基于微波信号谐振原理的路基土壤含水量测量传感器。通过理论分析的方法研究了微波含水量传感器中复介电常数与谐振频率之间的关系,并利用仿真计算以及试验测量的方法对所设计谐振环传感器进行了仿真分析、制作及试验测量。仿真与测量结果表明,这种谐振环式含水量传感器可用于测量土壤含水量,相较传统的电容传感方法、时域反射仪传感方法等,其在测量准确性上具有优势,且体积小巧,易于安装使用。
A soil moisture measurement sensor based on the principle of microwave signal resonance is designed. The relationship between complex permittivity and resonant frequency in microwave moisture content sensor was studied by theoretical analysis method. The simulation analysis, fabrication and experimental measurement of the designed resonant ring sensor were carried out by means of simulation calculation and experimental measurement. Simulation and measurement results show that this kind of resonant ring water content sensor can be used to measure soil water content. Compared with the traditional capacitive sensing method and time domain reflectometer sensing method, it has advantages in measurement accuracy and the volume Small, easy to install and use.