【作者】 程海燕；

【导师】 史忠科；

【作者基本信息】 西北工业大学 ， 系统工程， 2006， 硕士

【摘要】 城市交通拥挤是当今世界普遍关注的问题,它所带来的严重危害日益影响到人们的同常生活和社会经济的发展,而城市交通信号控制系统对解决这一问题发挥着不可替代的作用。本文从高性能智能交通信号控制系统的要求出发,针对目前我国城市交通问题的现状,对智能交通信号协调控制系统进行了研究和探时,并对城市交通信号动态优化算法在DSP中的实现进行了研究。 智能交通信号控制系统的研究涉及到多个技术领域,论文着匝就系统中的路口信号机进行了研究,主要工作内容有: (1)采用高性能的浮点DSPS作为系统核心处理器芯片,设计了基于TMS320C6713B的主控板,各总线通信接口模块与主控板之间的通信接口设计按统一标准进行,提高了系统的通用性。 (2)考虑到系统的可扩展性,设计了LonWorks总线通信模块,实现信号机各模块间以及与外部设备的数据通信。本模块以Neuron神经元芯片为核心,采用现场总线拓扑结构进行组网,增强了稳定性和数据传输的可靠性。 (3)为适应不同的需求,设计了GPRS无线通信模块,实现主控板与上位控制机及图像采集模块、棚邻路口信号机间的数据传输。 (4)为增姒系统的可靠性,从软件和硬件两方对系统进行了抗干扰设计。根据系统的具体工作要求,采用循环冗余校验、软件陷阱、指令冗余等软件可靠性设计以及电源监控、冗余备份等硬件措施,保证系统正常运行。 (5)针对曲型的城市多年道双向交通的交叉路口交通流分布,采用一种动态交通流的优化控制方法,在DSP的开发环境CCS中实现算法,并将优化算法移植到DSP系统中,实现单路口的自适应优化控制,仿真结果表明了所采用方法的有效性。更多还原

【Abstract】 Congestion in urban traffic is a problem commonly concerned around the world, and the harmful results that produce are increasingly affecting our daily life and the development of our society, and the traffic signal control system plays an important part to solve this problem. In this paper, aiming at the status of the urban traffic in China, an intelligent traffic signal control system is designed and developed, and the dynamic optimization and control techniques for urban traffic signal are mainly studied and its realization in DSP is also discussed.Intelligent Transportation System includes many technique fields, and the paper mainly studies the traffic signal machine. The main achievements of this paper are as follows:(1) A main control board circuitry based on high performance float-point DSP is designed. The interface design of bus communication module and main control board obeys the united standard, so it enhances the system applications.(2) In order to improve the expansibility, the LonWorks Bus communication module is planed to realize the data transfer of every part of signal machine and external equipments. The Neuron chip is the key part of this module and local bus topolopy heightens the stability and reliability.(3) A GPRS wireless communication module is build to satisfy different demands. It can accomplish the dada communications between the main control board and the remote controller, image collection module, next traffic signal machine.(4) To enhance the reliability, system docs the anti-jamming design from hardware and software. It adopts many measures to guarantee the system works successfully, including Cyclic Redundancy Check, software trap, instrument redundance, power watchdog, and so on.(5) Aiming at the signal control problem of the isolated intersection, a dynamic optimization and control method is put forward, whose objective is to minimize the total delay queue vehicles over the whole control period, and the method is been realized in DSP. The result indicates that the proposed method can greatly improve the traffic condition compared with the traditional fixed-time control method.更多还原