The Design Of Intelligent Traffic Controller Of Urban Multi-intersections Based On ARM

With the increasing development of social economy and urbanization, the urban population and vehicles increase rapidly. Traffic congestion and traffic jam have become prevalent problems for metropolis all over the world. Traffic accident, energy wasting, air pollution caused by exhaust gas and other problems resulted from traffic congestion and traffic jam not only seriously restrict the sustainable development of social economy, but also severely influence the urban living environment.Intelligent transportation system is one of the important ways to solve the antinomy of traffic demand and supply in the modem society, which relates to many facets of the traffic transportation systems. Urban road traffic is the most important part of the traffic transportation systems. Urban traffic intelligent control is the first step to implement the intelligent transportation systems engineering, and also a hot issue in control engineering and traffic engineering fields. Urban road traffic control is a complex systems engineering problem. It involves many subjects of science and technology, such as traffic engineering, automatic control, systems engineering, and optimization scheduling. Urban traffic intelligent control is a multidisciplinary research subject, and the development of urban traffic intelligent control technology depends on the newest research outcomes of science and technology. Applying the newest research of science and technology to urban traffic control systems can consummate traffic control theories and solve increasingly serious urban traffic problems, which are of the most important significance for meeting the social demand, accelerating the progress of nation and society, and driving the development of subject.At first, the dissertation reviews the concept of the intelligent traffic and the history and the status in quo native and abroad, and then deduces the main research contents after making a discussion on the difficulties and problems in this field. Secondly, it summarizes the basic knowledge of the traffic control. At the third step, based upon fuzzy logic theory, the dissertation puts forward a new intelligent algorithm of urban regional traffic control, and then designs a intelligent traffic controller, combined with the embedded microprocessor S3C2440A based on the ARM920T core, which is very popular in the embedded field. According to the functions, the design is divided into two parts:the hardware and the software. The hardware includes the circuit design of Power, Reset, Clock, JTAG debugging connector, UART connector, USB connector, Ethernet connector and LCD display connector. The software includes the design of the fuzzy controller, the-transplantation of the E-RTOSμC/OS-Ⅱand the composition of the application program based onμC/OS-Ⅱ. At the end, the dissertation makes a conclusion and proposes the future research directions in this field.