基于GPS的车辆调度系统的设计

【作者】 周波；

【导师】 刘国锦；

【作者基本信息】 南京师范大学 ， 电路与系统， 2008， 硕士

【摘要】 随着国民经济的快速发展,社会车辆迅速增多,2007年底,我国车辆保守估计量为1.2亿辆,尤其是一些运输集团拥有几十辆甚至上百上千辆车,因此有必要加强对车辆的监控能力。本文中的GPS车辆监控系统正是解决这个问题的好办法,对集团用户提供调度监控车辆能力,加强车辆管理,提高车辆运输效率,提高经济效益。本文主要介绍了GPS定位的基本原理,GPS数据标准,以及车辆调度系统所涉及到的无线通信协议、嵌入式系统等技术。根据不同应用领域采用不同的设计方案,灵活设计,从基本的定位,到数据实时传输监控,包括图像和视频的传输。关于车载终端的设计,本文提供两种方案,一种是基于GPS/GSM的车辆调度系统,采用短消息格式来传递车辆的位置信息;另一种方案基于GPS/GPRS,同过无线网络来传送信息,并实现了相关的软硬件设计。第一种方案硬件方面采用AT89C51芯片作MCU,采用TL16C554扩展串口,实现MCU与GPS模块的信息传输,并通过发送AT指令来控制GSM模块的信息读写与发送。第二种方案,MCU不仅可以处理GPS的信息,还可以采集其他的相关数据,例如图像、视频等,因此采用了嵌入式CPU,根据本系统需要扩展的各种外设模块和处理多媒体业务的需要,这里我们选择了SUMSUN公司266MHz的S3C2410来作为MCU,此芯片广泛应用于各类消费电子产品中,具有性能优秀,运行稳定的特点。在此基础上选用了32M的SDRAM,64M的NAND FLASH存储器共同构成核心的嵌入式系统。在嵌入式软件的选取方面,主要是嵌入式操作系统的选择,我们选用Linux,在此基础上进行嵌入式应用程序的开发。关于调度中心的问题,为了实现便捷的管理,调度中心配置一台高性能的PC处理机,扩展GSM模块或GPRS模块与远端移动用户通信,同时运行监控软件,从而完成调度和管理工作。更多还原

【Abstract】 With the development of economy, the count of vehicles grows up quickly, there are 12000 million vehicles at least in our country at the end of 2007, especially, some companies have dozens of vehicles, so it is the reason why should enhance the ability of controlling the vehicle. The controlling system of vehicles this paper provide is a good way to solve this problem, enhance the corporation’s ability of controlling and directing vehicle, advance the management of vehicle, send information of vehicle by wireless, increase the efficiency of transport of vehicle and the benefit.First of all, this paper introduces the principle of GPS and some technology and protocol about this system such as wireless communication, embedded system. It designed different product depending on different application, from basic requirement of positioning to transferring data of position, image and video.About the design of terminal on vehicle, we provide two solutions. The first one depending on the GSM, send the information of vehicle by sending SMS; The second depending on GPRS, so it can transfer more information through GPRS to the center. The first design uses AT89C51 as MCU, extends serial port by TLL16C554, processes the information which from GPS and send SMS by communicationing with GSM modem through the serial port. The second design not only processes the information from GPS, but also processes other information such as image, video and so on. We need cpu connect with other devices and can deal with multimedia, so we choose S3C2410 which widely used in many kinds of electronic product ,produced by SUMSUN corporation , it builds the embeded system with 32M SDRAM, 64M NAND FALSH. About the choice of embedded software, we choose the Linux system.To implement the management of vehicle, the center of controlling needs a high-power PC as processor, connects the PC with GPRS or GSM, running the surveillant software to implement its task of controlling and managing.更多还原