电容式水流泥沙含量传感器温度补偿技术的研究  

Research on Temperature Compensation to Capacitance Sensor for Measuring Sediment Concentration in Flow Water

作　　者：李小昱[1] 雷廷武[2] 王为[1] 

机构地区：[1]华中农业大学工程技术学院,武汉市430070 [2]中国农业大学水利与土木工程学院,北京市100083

出　　处：《农业机械学报》2002年第5期78-80,共3页Transactions of the Chinese Society for Agricultural Machinery

基　　金：中国科学院"引进国外杰出人才"项目 (项目编号 :982 60 2 ) ;中国科学院;水利部西北水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室项目 (项目编号 :10 5 0 1- 92 ) ;西北农林科技大学科研专项资助项目 (项目编号 :0 80 8)

摘　　要：采用自行研制的电容传感器测量了水流中泥沙含量与传感器输出电压 ,研究了测量水流泥沙含量的温度补偿技术。结果表明 ,水流泥沙含量与传感器的输出电压呈线性关系 ,传感器的输出随温度的升高而逐渐增大 ;通过对温度的监测并由软件实现补偿的方法 ,可大大提高测量的精度 ;该方法能得到工作温度范围非标定条件下任一温度状态的输入输出特性 。It is very important to measure sediment concentration in water current on studying of soil erosion and soil and water conservation. Adopting the capacitance sensor made by ourselves, the relationship between sediment concentration in water current and output of capacitance sensor, and the temperature compensation technique of sediment concentration in the water current were researched. The experimental result showed that the sediment concentration in water current is in linear correlation with the output of capacitance sensor, and the output of capacitance sensor increases with the temperature. Using the temperature compensation technique realized by the software of micro computer, the measuring accuracy can be raised obviously. Within a range of working temperature, this method gives input and output signals from the capacitance sensor at any temperature spot, and its temperature stability increases notably.

关 键 词：电容式 水流泥沙 含量 传感器 温度补偿 

分 类 号：P333.4[天文地球—水文科学]