Design And Application Of LED Bar Guidance Screen Control System Based On A Distributed Architecture

In recent years, the problem of traffic congestion has started from Beijing, Shanghai and other first tier cities to the second tier, three lines of urban sprawl. From the end of last century, our country began to research the intelligent transportation system, hoping to deal with the more and more serious traffic problems by electronic, information and other scientific and technological means. At present, the intelligent transportation system has been deployed in the first tier cities, and has achieved good results. As an important information window of intelligent traffic, traffic guidance screen plays an important role in urban traffic.The main work of this paper is to design a distributed control system, which is installed in the main traffic intersection of the city, and the function of the system is realized through the code. Specific research and design work is as follows:1、Data compilation. After a review of relevant literature, familiar with the development of traffic guidance screen, and its main function, installation, and installation location features. At the same time, to understand the current controlling unit main implementation platform and implementation.2、Describes the intersection induced effects and manner, and made a traffic intersection in the installation and deployment guidance screen bar. Then shows its installation, usage scenarios. After detailing the series ARM processor unit Kinetis K6x the system control card used.3、Details of the communication protocol of the system. Based on this agreement, extracting the function of each part needs to implement. After the re-combination of features, the formation of different software modules.4、We designed all of the above software modules. A detailed description of the work flow of each module design, the key code block. Independent use C language to complete the implementation of all modules.5、After using the system deployment, research work did not stop. Since then, explore some auxiliary functions, we hope in future versions is added to the system.Design results of this paper has been formed products used in the actual city traffic. At present, users reflect the system to complete the scheduled functions, the actual work of a well-functioning, did not show abnormalities. For the use of the system, and thereafter will be concerned about.