基于Linux的高速公路收费系统关键技术研究

发布时间：2018-01-26 17:38

本文关键词： 收费系统设备驱动远程启动 Unux Overlay　出处：《南京大学》2014年硕士论文　论文类型：学位论文

【摘要】：收费系统是高速公路管理体系的重要组成部分,其基本功能是收取通行费用。随着国内经济的快速发展,高速公路交通运输流量逐年猛增,研究新型收费系统,缩短单车收费时间,提高道路通行率,变为一个极为迫切的任务。国内高速公路当前使用的收费系统基本上都采用Windows平台开发,由于Windows平台本身的限制,导致安全性差、费用高、维护困难等问题普遍存在。基于Linux平台开发新型的高速公路收费系统,可以很好地解决现有系统存在的各种缺陷,本文对开发过程中的关键性技术进行了详细研究。本文引入C/S架构设计模式,将收费站子系统划分为服务器端和客户端两部分,分别对其功能进行设计与实现。服务器提供远程启动与安装、数据管理、安全检测、在线更新等服务；客户端负责完成过往车辆收费任务,以及各种数据的上传。每个收费站由一个服务器和多个车道客户端组成。客户端系统设计过程中,对内核、文件系统和特殊硬件设备驱动分别进行了深度定制和优化,使系统启动速度和资源占用情况得到很大改善。针对高速公路收费系统实时监控的需求,本文设计并实现了基于Overlay显示模式的视频采集优化方案,并对视频窗口遮盖、快速移动车辆抓拍图片模糊等问题进行了分析和解决。与传统方法相比,Overlay显示模式下的视频数据流不需要经过CPU处理,而是通过计算机的DMA通道直接发送到显存里进行显示。测试结果表明,该方法能够显著提高视频采集帧率,改善视频显示效果,降低车道工控机的资源消耗,充分发挥图像采集设备的能力,符合收费系统实时监控的应用需求。针对现有系统维护困难的问题,本文设计并实现了基于网络的高速公路收费系统快速部署与恢复方案。方案基于C/S架构进行设计,收费站服务器实现远程启动服务,为客户端提供网络启动功能,客户端系统的安装、配置文件都存放于服务器固定目录下；客户端通过同网段内的服务器远程启动,运行自动安装程序,下载安装文件到本地磁盘,进而完成系统的安装与恢复。方案支持多个客户端同时进行系统安装和恢复,适合收费系统的大面积部署,而且操作简单,安装速度快,能够节约系统部署和维护成本。
[Abstract]:Toll collection system is an important part of the expressway management system, its basic function is to charge fees. With the rapid development of the domestic economy, the traffic and transportation volume of expressway has increased rapidly year by year, and a new type of toll collection system has been studied. It is an urgent task to shorten the time of bicycle toll collection and improve the road traffic rate. The current toll collection system of domestic expressway is basically developed on Windows platform. Because of the limitation of Windows platform, the problems such as poor security, high cost and difficult maintenance are common. Based on Linux platform, a new type of expressway toll collection system is developed. All kinds of defects in the existing system can be solved well. The key technologies in the development process are studied in detail in this paper. In this paper, we introduce the C / S architecture design pattern, divide the toll station subsystem into two parts: server and client, and design and implement its functions respectively. The server provides remote startup and installation, data management. Security detection, online update and other services; Each toll station is composed of a server and a number of driveway clients. The client system design process, the kernel. The file system and the special hardware device driver are respectively deeply customized and optimized, which greatly improves the system startup speed and resource occupancy. Aiming at the demand of real-time monitoring of freeway toll collection system, this paper designs and implements a video capture optimization scheme based on Overlay display mode, and covers the video window. Compared with the traditional method, the video data stream in overlay display mode does not need to be processed by CPU. Instead, the DMA channel of the computer is sent directly to the video memory for display. The test results show that the method can significantly improve the frame rate of video capture and improve the effect of video display. It can reduce the resource consumption of the driveway industrial computer and give full play to the ability of image acquisition equipment, which meets the application demand of real-time monitoring of toll collection system. Aiming at the difficult maintenance of the existing system, this paper designs and implements the rapid deployment and recovery scheme of expressway toll collection system based on network. The scheme is designed based on C / S architecture. The charging station server realizes the remote startup service, provides the network startup function for the client, the installation of the client system and the configuration file are all stored in the fixed directory of the server; The client remotely starts the server in the same network segment, runs the automatic setup program, and downloads the installation file to the local disk. The scheme supports multiple clients to install and restore the system at the same time, which is suitable for the large area deployment of the charging system, and the operation is simple and the installation speed is fast. Ability to save system deployment and maintenance costs.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495;TP316.81

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