【作者】 李振兴；

【导师】 李战明；

【作者基本信息】 兰州理工大学 ， 控制理论与控制工程， 2011， 硕士

【摘要】 无线传感器网络是一种综合了各种新兴技术的通信网络,网络节点可佩带多种不同性能的传感器,方便人们收集各种不同的信息。无线传感器网络的出现大大提升了人们与现实世界的交互能力。这种应用性的网络被广泛运用于军事,环境监测,医疗监护,保健,工业,商业,家居等各种不同的领域。生命探测仪是目前安全救生领域的关键,在面对灾后人员搜救方面,它有着极强的优势,在汶川大地震的时候,有很多人得到了生命探测仪的帮助得以获救,在日本福岛大地震中,生命探测仪也发挥了很大的效用。论文的目的是在无线网络的基础上建立生命探测系统,使二者的优势在同一平台下得以发挥。本文通过对目前比较常见的几种无线网络协议进行比较,选出ZigBee协议作为搜救系统的网络通信协议,在对协议栈做了深入的分析和研究后,对于协议的总体框架,协议的各层关系和协议提供的API函数有了了解,对于协议栈的实际程序运行情况有所认识。对于多种定位算法进行对比和分析,选出适合ZigBee协议的算法,同时提出了该算法的不足。在能够满足对于人员搜救的要求的同时对选定的方法做了修改,提高了算法的精度。通过对满足ZigBee协议栈的多种芯片设计方案做对比,选择CC2430作为本次设计的核心芯片。在前面工作的基础上设计搜救平台的整体需求,完成搜救平台的方案设计并做了软件设计,调试成功。最后测试了不同障碍下系统的点对点通信情况,信号强度指示和定位情况,并对数据进行分析。论文实现了待救援人员的生命体征的提取和定位,具有一定的意义。更多还原

【Abstract】 Wireless sensor network is a kind of communication networks which is acombination of emerging technologies, network nodes can be worn a variety ofdifferent properties of sensors, it is easy for people to collect all kinds of differentinformation. The emergence of wireless sensor network greatly enhances people’sability to interact with the real world. This application of the network is widely usedin military, environmental monitoring, medical care, health care, industrial,commercial, home and other various areas.Life detector is a key of safety and rescue area, it has a strong advantage inpersonnel search and rescue in the face of disaster, during the WenChuan earthquake,many people got the help of life detector to be rescued, during Fukushima earthquake,life detector also played very effectively. The aim of this paper is to establishlife-detection systems based on the wireless network, so that the advantages of bothcan be played on the same platform.Based on the comparison of several present common wireless network protocols,ZigBee protocol network communication protocol is selected as the search and rescuesystem network communication protocol. There is a good comprehension of theoverall framework for the protocol, the relations of each protocol layer, and the APIfunction which is provided by protocol, the practical procedures for the protocol stackhave been understood.Various positioning algorithms are compared in order to do a comparison andanalysis to select a appropriate algorithms for ZigBee protocol, the shortcoming of thealgorithm is proposed at the same time. Some changes are made for the selectedmethod to improve the accuracy of the algorithm at the same time to meet therequirements of personnel search and rescue.A variety of chip design that can meet the ZigBee protocol stack are compared,the CC2430 is selected as the core chip of this design. Based on the work ahead, thegeneral requirements of search and rescue platform are assumed to complete thedesign of search and rescue platform, software is designed and debugged successfully.Finally, communication circumstances of systems were tested point to point underdifferent barriers, signal strength indicator and location were also tested, the dataanalysis has done.This paper realized the extraction and location of the vital signs of being rescuedpeople, which has certain significance.更多还原