一种土壤剖面水分传感器的节点电路设计  

Design of node circuit for a soil profile moisture sensor

作　　者：由婷[1] 王新忠[2] 刘飞[3] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093 [2]江苏大学江苏省农业装备与智能化高技术研究重点实验室,江苏镇江212013 [3]上海汽车集团股份有限公司技术中心,上海201804

出　　处：《传感器与微系统》2013年第3期141-143,共3页Transducer and Microsystem Technologies

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.

关 键 词：水分 传感器 土壤剖面 节点电路 

分 类 号：S24[农业科学—农业电气化与自动化]