利用无线传输的BDS--R土壤湿度反演系统  

BDS--R soil moisture retrieving system using wireless transmission

作　　者：赵芬[1] 严颂华[1] 陈能成[2] 胡德正[1] 张训械[3] 

机构地区：[1]武汉大学电子信息学院 [2]武汉大学测绘遥感信息工程国家重点实验室 [3]中国科学院武汉物理与数学研究所

出　　处：《传感器与微系统》2015年第10期79-82,共4页Transducer and Microsystem Technologies

基　　金：国家"973"计划资助项目(2011CB707101);中央高校基本科研业务费专项资金资助项目(2042015GF0018)

摘　　要：针对野外地区土壤湿度监测时间长、数据采集量大的需求,提出了基于无线传输的BDS—R土壤湿度反演系统。以UM220—III N和GPRS DTU为核心构建了北斗信号数据处理与无线传输模块,将圆极化天线采集的北斗信号数据处理成NMEA 0183格式串行数据,并经GPRS与Internet传送至COMWAY无线串口服务器,再通过Microsoft Visual Studio 2008软件构建的数据存储软件提取服务器上的数据,并保存至本地磁盘。选取了连续1个月的北斗C05卫星信号信息进行反射系数法反演土壤湿度实验,反演结果与原位湿度值相关系数达0.69,平均相对误差为16.86%,表明系统工作可靠性强,适用于长期远距离的野外地区土壤湿度反演。Aiming at requirements of long time field area soil moisture monitoring and large quantity of data collection,soil moisture retrieving system,Bei Dou satellite system-reflectometer（ BDS—R） based on wireless transmission is proposed. Constituted by UM220—Ⅲ N and GPRS DTU modules as its core,Bei Dou signal processing and wireless data transmission modules are built up,Bei Dou signal are collected by circularly polarized antenna and processed into NMEA 0183 format serial data and transmitted to wireless serial server COMWAY via GPRS and the Internet. Log on serial server and use data saving software compiled by Microsoft Visual Studio 2008 software to extract data and save it into local disks. One month consecutive signal information of Bei Dou C05 satellite are selected for soil moisture inversion experiment by reflection coefficient method,correlation coefficient between inversion results and the in-situ humidity values reach to 0. 69,average relative error is 16. 86 %,which proves that reliability of the system is really good,it is suitable for long distance field area soil moisture inversion for a long time.

关 键 词：BDS-R 土壤湿度反演 通用分组无线业务 无线串口服务器 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]