The Design And Implement Of The Graphics Software In The Expressway Monitor System

With the development of economy, expressway is more and more popular because of its 'high speed'. How to reduce the loss caused by traffic jam and accident, and monitor the highway situation by scientific way has been significant subject. Now the information technologies such as computer networks, database and GIS are progressing rapidly. Applying these technologies to expressway monitor, thus the purpose of management more scientific and supervisory more effectively is achieved, is most significant.Based on the correlation theories of computer science, this paper introduce in detail the graphics subsystem design process, which is the subsystem of the Chongqing Shangjie expressway monitor system, and brings forward a universal solution.Firstly, This paper introduces the structure of expressway monitor system, including characters and function of all of the subsystem, especially graphics subsystem. After the basic theories of OOP (Object Oriented Programming) and UML (Unified Modeling Language) are introduced, UML is studied for graphics subsystem software design and system model graph is build by UML tool. Then, communication rules about graphics subsystem is introduced, and database is designed by normal way. Finally, the realization of the graphics subsystem software is presented, and the key technologies-component technology and multithreading programming technology are discussed in detail.The research and design of this subject synthesizes multifold technologies, such as control, OOP, data base design, component, multithreading etc. Having good flexibility and high reliability, the whole system is worth to popularize.