基于高频电容原理的土壤剖面水分传感器研究  

Research of soil profile moisture sensor based on principle of high-frequency capacitance

作　　者：王新忠[1] 刘飞[1] 由婷[2] 

机构地区：[1]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 [2]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《传感器与微系统》2012年第10期12-15,共4页Transducer and Microsystem Technologies

基　　金：江苏省科技支撑计划资助项目(BE2011346);江苏省高校自然科学基金资助项目(09KJD210003);江苏省农机三项工程资助项目(NJ2011-46);苏州市科技支撑计划资助项目(SN201137);昆山市农业科技计划资助项目(KN1110)

摘　　要：为了实现土壤剖面不同深度的水分测量,基于高频电容原理,研制了一种能够自动、连续监测土壤剖面动态含水量的水分传感器。通过实验,建立了传感器数学标定模型,并对传感器进行了相关性能测试。通过对比分析土壤水分实际值与传感器测量值,结果表明:传感器最大绝对误差为-5.10%。传感器测量水分梯度变化明显,可用于土壤剖面不同深度水分的测量,具有低成本、低功耗的特点,可应用于农林业实际生产。In order to achieve the soil moisture measurement of different depths of soil profile,a soil profile moisture sensor is designed based on the principle of high-frequency capacitance,which can automatically and continuously monitor the dynamic water content.The sensor mathematical calibration model is established by test,and sensor-related performance is tested.By comparing the actual value of the soil moisture with the sensor measurement value,the results show that the maximum absolute error of sensor is-5.10%.The sensor can be used for the measurement of the soil moisture at different depth of soil profile,which apparently reflects the moisture gradient.It is suitable for the measurement of soil moisture at different depth of soil profile and application of agroforestry production with low-cost and low power consumption.

关 键 词：土壤水分 传感器 土壤剖面 电容 高频 

分 类 号：S152.7[农业科学—土壤学]