摘要
为实现土壤剖面不同深度水分的同时测量,研制了一种土壤剖面水分传感器,对传感器节点部分的电路进行了设计与实现,具有功耗低、成本低等特点。实验结果表明:应用此电路的传感器,输出电压随着土壤体积含水量的增加而减小;与烘干法所测得的土壤水分实际值相比,传感器的最大绝对测量误差为-5.10%;传感器用于土壤剖面不同深度的土壤水分测量,水分梯度变化明显,性能良好。
In order to achieve Soil moisture measurement of different depths of soil profile, a soil profile moisture sensor is designed, especially circuit of sensor node is designed and implemented which is low-cost and low power consumption. The experimental results show that the sensor output voltage with this circuit decreases with soil moisture content increasing, and by comparing the actual value of the soil moisture with the sensor measurements, the maximum absolute error of sensor is -5.10 %. The sensor can be used for measurement of soil moisture at different depth of soil profile, moisture gradient change is apparent, the performance is good.
出处
《传感器与微系统》
CSCD
北大核心
2013年第3期141-143,共3页
Transducer and Microsystem Technologies
