基于嵌入式PLC的电子警察系统的设计与研究

发布时间：2019-04-02 02:58

【摘要】：随着我国综合国力及经济水平的不断提高,交通事故频发、交通违法普发等问题日趋严重。因此,人们对交通违法自动抓拍系统的依赖变得愈发强烈,不仅需求广泛,要求也越来越高。尤其是执法部门,对车辆违法自动抓拍系统的需求已经不仅仅停留在抓拍精确、照片清晰,更要求设计合理、运行稳定,且要有足够的兼容性。当前,市场上违法抓拍系统集成商鱼龙混杂,技术水平参差不齐,各家电子警察系统控制系统均不同程度存在兼容性问题,这极大的限制了电子警察系统的更新换代速度,显然已难以满足交通违法抓拍的市场需求。根据电子警察系统抓拍控制单元常见的问题及客户对系统高稳定性的需求,本课题提出了引入嵌入式PLC技术来改进抓拍控制单元多发问题的解决方案。具体是通过嵌入式PLC来触发高清相机外接的快门控制器,从而激活高清摄摄像机,启动抓拍,以求达到提升电子警察系统抓拍单元工作的稳定性,同时扩展其系统的兼容性,为将来系统更新换代预留可能。针对客户对车辆违法抓拍需求,本文系统论述了以嵌入式PLC为抓拍单元核心的电子警察系统的系统架构和工作原理。详细阐述了如何利用外接快门控制单元控制高清摄像机,以及怎样通过对视频流的检测完成违法车辆的自动抓拍、号牌自动识别和违法信息上传。最后,对本文所完成的工作进行了系统总的结,对改善后的系统中依然存在的问题和不足,提出了下阶段的改善思路和方向。本文系统论述了在抓拍控制单元引入嵌入式PLC技术的电子警察系统的设计原理、开发、使用,较好解决了传统技术存在的误拍、漏拍等抓拍精度不足、兼容性不佳及系统不稳定等问题。
[Abstract]:With the continuous improvement of China's comprehensive national strength and economic level, the frequent occurrence of traffic accidents and the widespread occurrence of traffic violations are becoming more and more serious. Therefore, people's dependence on traffic illegal automatic capture system has become more and more strong, not only widely, but also more and more demanding. Especially for the law enforcement department, the demand for vehicle illegal automatic capture system is not only accurate, clear photos, but also reasonable design, stable operation, and enough compatibility. At present, illegal capture system integrators on the market are mixed, the technical level is uneven, and there are compatibility problems in various electronic police system control systems, which greatly limits the speed of updating the electronic police system. Obviously, it has been difficult to meet the traffic illegal capture of the market demand. According to the common problems of the capture control unit of the electronic police system and the requirement of the customers for the high stability of the system, this paper presents a solution to improve the multi-issue problem of the capture control unit by introducing the embedded PLC technology. Specifically, the embedded PLC is used to trigger the external shutter controller of the HD camera, so as to activate the HD camera and start the capture, in order to improve the stability of the capture unit of the electronic police system, and expand the compatibility of the system at the same time. The possibility is reserved for future system updates. In this paper, the architecture and working principle of the electronic police system with embedded PLC as the core of the capture unit are systematically discussed in view of the customers' demand for illegal capture of vehicles. How to use external shutter control unit to control high-definition camera and how to automatically capture illegal vehicle by detecting video stream, automatic identification of number plate and uploading of illegal information are described in detail. Finally, the general conclusion of the work completed in this paper is given, and the improvement ideas and directions in the next stage are put forward for the problems and shortcomings that still exist in the improved system. This paper systematically discusses the design principle, development and application of the electronic police system, which introduces embedded PLC technology into the capture control unit, and solves the shortage of the shooting accuracy of the traditional technology, such as false beat, missed beat, and so on. Poor compatibility and system instability.
【学位授予单位】：齐鲁工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U495

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