【作者】 张莹；

【导师】 汪小燕；

【作者基本信息】 华中科技大学 ， 通信与信息系统， 2013， 硕士

【摘要】 由于无线传感网其具有低成本，低功耗，可进行远程监控和维护等优点，所以被广泛应用于家庭，工业，军事，医疗，抢险救灾等领域，实现数据的采集，传输和处理。无线传感器网络节点的定位是无线传感网的最基本的功能之一，对无线传感网起着关键的作用，目前国内外已经有很多人关注无线传感器网络节点定位这一技术。本文分析了无线传感器网络节点定位的发展现状以及关键技术，设计实现了低功耗，便于携带，成本低廉的大功率无线传感器节点。通过对定位方法的比较并结合硬件设计，采用RSSI方法进行节点定位。在芯片选择上节点采用TI公司的CC2431无线收发芯片和CC2591射频功放，最大通信距离350m，在较为简单的环境下定位误差小于3m。并使用MySQL+PHP技术和AJAX技术搭建远程查询系统界面，实现了通过互联网远程访问服务器查询节点的定位数据信息和地图位置查询。本文详细介绍了节点的硬件设计，定位实现以及远程查询系统的设计。在硬件方面对无线收发模块，射频放大模块等做了详细的设计；在软件方面，首先设计了节点的定位流程；其次对数据库进行了设计，并对定位数据历史信息查询页面以及地图查询页面的设计进行了详细说明。最后，对节点的功能和性能进行了测试，测试结果表明节点无线通信稳定，实现了定位功能，并可以通过远程客户端访问服务器查询节点位置信息，实现了设计的需求。更多还原

【Abstract】 Wireless sensor networks have been widely deployed. Because of their low cost, lowpower consumption and the ability of remote monitoring and maintenance, they areapplied for data collection, transmission and processing in many filed, such as household,industry, military, medical treatment and disaster relief. Localization of sensor nodes isone of the most basic functions of wireless sensor networks, which is pivotal for wirelesssensor networks. Until now, much attention has been paid on this technology.In this thesis, we analyze the development situation and the key technology of sensornode localization, and then designs sensor nodes which qualify the character of low powerconsumption, portable and inexpensive. With the comparison of different methods of nodelocalization, RSSI is chosen finally with the consideration of our hardware design.CC2431and CC2591of TI Company are picked for our system, whose localization errorsof the nodes is less than3m in comparatively simply environment, while maximumcommunication distance is about350m. Besides, we use MySQL+PHP and AJAX toconstruct the remote query system interface, presenting the remote access for nodes’ theinformation of localization and position in the map server via the Internet.In this thesis, the design of hardware, realization of localization and Web server arediscussed in detail. As to hardware framework, wireless transceiver module and RFmodule are designed in detail. In the terms of software, the principle and process oflocalization are carefully devised, and how to query localization data and position in themap are discussed in detail. Finally, we test the function and performance of these nodes.The results show that the nodes work steadily, and the system realizes the function oflocalization, while the position information can be accessed via Internet. The design ofhardware and software meets the requirement perfectly.更多还原