温度对FDR土壤湿度传感器的影响研究  

Research on Temperature Effect on FDR Soil Moisture Sensor

作　　者：曹美[1] 徐晓辉[1] 苏彦莽[1] 宋涛[1] 周萌[1] 贾薇[1] 

机构地区：[1]河北工业大学信息工程学院,天津300401

出　　处：《节水灌溉》2015年第1期17-19,23,共4页Water Saving Irrigation

基　　金：河北省科技支撑计划项目(13210305D);石家庄市科技支撑计划项目(131130322A)

摘　　要：在利用FDR土壤湿度传感器测量土壤湿度时,土壤温度的变化会使测量结果产生较大的误差,因此要对FDR土壤湿度传感器进行温度补偿。为了研究温度对FDR土壤湿度传感器的影响规律,利用不同湿度的土壤样本在不同温度下进行实验。根据实验结果采用二元回归分析法对FDR土壤湿度传感器和土壤温度传感器的输出进行数据融合,消除温度对FDR土壤湿度传感器的影响。融合补偿后的数据结果比未补偿的数据受温度影响减小,更加接近土壤真实湿度值,大大减小了土壤温度对测量结果的影响。When using FDR（Frequency Domain Reflectometry）soil moisture sensor to measure soil moisture,the soil temperature change will create large error of the measurement results.In this study,experiments are conducted at different temperatures by using soil samples with different moisture content to analyze the influence of temperature on FDR soil moisture sensor.Binary regression analysis method is applied to conduct data fusion processing of FDR soil moisture sensor and soil temperature sensor to eliminate the influence of temperature on FDR soil moisture sensor.Compared with the data before fusion,the data after fusion is less influenced by temperature and more close to the true soil moisture value,thus the influence of soil temperature on the measurement results is greatly reduced.

关 键 词：FDR土壤湿度传感器 温度补偿 二元回归分析 

分 类 号：P426.68[天文地球—大气科学及气象学]