土壤水分无线传感器网络节点设计与测试  

Design and Experiment of the Wireless Underground Sensor Network Node for Soil Water Content

作　　者：张增林[1] 郁晓庆[1] 

机构地区：[1]西北农林科技大学,陕西杨凌712100

出　　处：《中国农村水利水电》2012年第12期5-8,共4页China Rural Water and Hydropower

基　　金：国家"863"计划项目(2006AA100223)

摘　　要：在研究无线地下传感器网络(wireless underground sensor networks,WUSN)技术应用于农业灌溉时,利用嵌入式处理器和射频模块开发设计了无线地下传感器网络节点和汇聚节点。WUSN节点由传感器、处理器、无线通信和能量供应模块组成,处理器采用MSP430单片机,射频模块采用433MHz频率的H8410通信模块,汇聚节点由RF收发模块、核心控制电路、信息处理、数据存储、液晶显示和电源等部分组成。WUSN节点采集土壤水分信息,并发送给汇聚节点,实现对信息的汇总、分析、处理、存储、显示和传输。对不同的土壤含水率进行试验,得出节点低含水率下无线电信号的路径损耗和误码率最小。同时,通过节点埋藏深度的改变对信号衰减的影响,得出有效传输的最佳WUSN节点埋藏深度。无线地下传感器网络节点的设计在农业信息采集、灌溉等方面具有广阔应用前景。With the application of the wireless sensor network technology in agricultural irrigation, the wireless underground sensor network nodes and a sink node based on embedded technology and RF technology are developed. WUSN node consists of sensor, the processor, wireless communication module and power module, processor using MSP430 microcontroIler, RF modules adopting H8410 communication module with 433MHz frequency. Moreover, the sink node is made up of RF transceiver module, the core con- trol circuit, information processing, data storage, LCD module and power supply. The nodes acquire soil moisture ~nformat[on and send them to the sink node that implements fusion, analysis, processing, storage and display of information. For different soil mois- ture content test, the path loss and bit error rate of radio signal are the least under low moisture content. At the same time, the best WUSN node buried depth is got through the influence of the nodes buried depth change on the attenuation of signals. Design of wire- less underground sensor network node has a broad application prospect in agricultural information collection, irrigation, etc.

关 键 词：无线地下传感器网络 MSP430 汇聚节点 土壤信息采集 

分 类 号：S24[农业科学—农业电气化与自动化]