【作者】 张海英；

【导师】 余臻；

【作者基本信息】 厦门大学 ， 检测技术与自动化装置， 2008， 硕士

【摘要】 随着自动化技术、通信技术以及多媒体技术的发展,电力监控系统有了长足的发展,面对日新月异的要求,传统的遥测、遥信、遥调和遥控“四遥”功能已经不能完全满足监控系统的需求了,因此在此基础上引入图像监控,进一步完善电力远程监控系统。图像监控,通过图像所包含的信息更好地了解所监控现场,对电力监控系统而言其监控对象大都是静态的,所以系统实现静态的图像传输基本可满足需求。图像也是一种数据,将原本的模拟量转换为数字量使之成为可压缩的数据再加以压缩,以图像文件的方式在信道上传输,实现图像监控。对整个监控系统而言,通信是其最关键的一部分,它分为数据通信与图像通信两部分。本文以实验室进行的电力配电项目为背景,首先对无线数据通信的实现进行分析,并比较了两种通信组网方案:基于无线数传电台方案和基于GPRS无线传输方案。然后对图像通信中的关键技术进行分析研究,并对几种图像的通信方式进行比较。由于图像文件数据量很大,不能通过串口一次性传输,所以要对其数据进行分包,以便在串口中传输,实现和其它数据量采用同一信道进行传输。通过视频采集卡和摄像头监控图像,并将所采集的图像发送到监控中心,实现远程监控系统。系统的实现平台是Visual C++,从试验的角度,采用视频采集卡、摄像头和PC机结合的系统。本文第一章简要介绍了电力监控系统的发展和通信技术;第二章介绍了基于不同通信方式的远程监控系统;第三章对远程数据通信的实现进行分析;第四章对图像通信中的关键技术进行介绍;第五章主要是通过实验实现图像的传输;最后一章是对全文内容的总结以及一些展望。更多还原

【Abstract】 Along with the development of automated technology, the communication as well as the multimedia technology, the electric power supervisory system had the considerable development. Faced with the ever-changing demands, the traditional "four remote" function already cannot completely satisfy the supervisory system’s demands. Therefore introduces the image monitoring to consummate the electric power long-distance supervisory system. The image monitoring, through the information contained in the images we can know more about the monitoring scene. The monitoring objects of the electric power supervisory system mostly are static state, so if the system achieves the image transmissions it can basic meet the demands. The image also is a kind of data, the analog signals is converted to digital signals, so the data can be compressed. Then it will be transmitted by the image document’s way on the channel, realizes the image monitoring. To the entire supervisory system, the communication is the most crucial part, it divides into data communications and image communications.The paper bases on the electricity distribution project which carried on the laboratory. first, makes analysis to the realization of wireless data communications and has compared two kinds of communication networks: the project based on wireless digital radio and the project based on GPRS wireless transmission. Then conducts the analytical study to visual communication’s key technologies, and carries on the comparison to several modes of image communication. Because the data of the image document is very huge, so it is necessary to make the sub-data in order to transmit in the COM. It realizes the image files and other data using the identical channel to carry on the transmission. Using the video frequency gathering card and camera monitoring the scene, and sending the image to the monitoring center, so that it realizes the long-distance supervisory system.. the platform of the system is Visual C++, from the experimental angle, uses video frequency gathering card, camera and PC to make up a system.The first chapter briefly introduced the development of the electric power supervisory system and communication technology; the second chapter introduced the remote supervisory system basing on the different means of communication; the third chapter analyzed the realization of long-distance data communications; Chapter IV introduced the key technology in the image communication; In Chapter V realized the image communication in experiment; The last chapter is the summarize of the whole text and some prospects.更多还原