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.
出处
《中国农村水利水电》
北大核心
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)
