GPS网络系统及其在实时高精度形变监测中的应用研究

【作者】 李克昭；

【导师】 张勤；

【作者基本信息】 长安大学 ， 大地测量与工程测量， 2003， 硕士

【摘要】 GPS网络系统是集GPS定位技术、计算机技术、通信技术于一身的高科技系统。近年来，随着GPS定位技术的日趋成熟，使得定位的精度得到了很大提高，定位的时间也大大缩短，另外，一直制约GPS数据实时传输的通信技术也随着全球移动通信技术和卫星通信等通信技术以及宽带网络技术的发展与进步得到了大幅度的提高，这样，为GPS网络系统的研究与应用注入了活力。本文首先介绍了GPS网络系统在各行业的应用与研究现状以及存在的问题，然后以其在形变监测的应用为例，进行了如下研究与实验： 1．阐述了GPS网络系统的组成、支撑技术； 2．从GPS原始数据的实时传输入手，以ASHTECH型GPS接收机为例，详细研究、分析了GPS原始数据文件的解码，并在VC++平台下实现了GPS接收机与计算机的实时通信； 3．介绍了GPS数据处理的基本原理，在学习Kalman滤波的基础上，认为Kalman滤波技术适合于GPS网络系统数据的实时处理，给出了其应用模型，并以下载的数据为例，进行了实例计算； 4．最后以一大坝为例，设计了其GPS网络结构及网络流程图。更多还原

【Abstract】 GPS network system is an advanced one which combines with GPS positioning, computer and communication technology .In recent years, with the developing of GPS positioning technology ,the precision of it is improved and the poisoning time required is decreased. What’s more, with the fast development of Global System for Mobile Communications, satellite communication and Wide Band, the communication technology that constrained the transportation of GPS real data is improved. As a result, communications inject new life into the application and research of GPS network system. This paper initially introduces the present state of application and research of GPS network system in all aspect of life , and illuminates unsolved problem in the process of application and research .And taking the application of GPS network system in the deformation monitoring for the case ,mainly do the following research and experiments :1. illuminating the component of GPS network system and relative technology ;2. Taking the ASHTECH GPS for example .and starting from real transporting GPS primary data ,this paper analyses the code of GPS primary data files and realizes the real communication between GPS receiver and computer under VC++ platform;3. Introducing the basic theory of GPS data process .On the base of studying Kalman filter ,1 think that the theory of Kalman filter can be applied to process the real data of GPS network system and give the model of application .1 use the downloading data to confirm the model.4. Finally taking a dam for example ,1 design the structure of GPS network system and flow chart.更多还原