Research And Design Of Modern Tram Line Switch Wayside Control Unit

With the upgrading of the acceleration of urbanization and socio-economic, urban expansion and urban population growth, traffic congestion and energy crisis has become an important issue facing the world. In order to solve urban traffic congestion, rail transportation for sustainable development has become an effective means. Modern trams with a new look to re-boarded the stage of history, the construction of low investment, short construction period, low operating costs, high transport efficiency, low-carbon environment and convenient time, etc., has become the first choice for small and medium urban public transport development. Modern trams turnout control unit is the safe operation of the entire process of core areas, through the car control equipment and trackside control equipment to complete the train operation control and dispatch management tasks by means of wireless communication. Therefore, the design of a main line switch to ensure safe and efficient operation of the train track next to the control unit is imminent.Firstly, the research background and significance of modern trams were described in detail from the development process and the status quo at home and abroad, then analyzes the modern streetcar adaptability, on the main characteristics and technical characteristics of a study tram Classification; Secondly, by analyzing the key technique of modern tram switch control, respectively, to determine the basis for the design and function of the principle of key technologies from the turnout control application characteristics and work scenarios, and focused on the positive line switch control switch control technology and design ideas process; Once again, to switch control mode detailed classification introduced, followed by comparison against turnout decentralized control than a centralized control is more suitable for modern streetcar operators, thus turnout decentralized control scheme than the selected design, respectively, based on cross induction loop based WLAN wireless remote control as well as comparative analysis of short-range communication based on DSRC different kinds way to communicate, and ultimately come to meet the needs of modern tram switch control based on cross induction loop control mode; Then, according to the modern tram operation and operation organization to design the overall structure diagram, respectively, then designed the hardware and software configuration diagram of a modern tram switch control unit, mainly from the microprocessor circuit, a detection circuit, a driving circuit, a circuit and a communication circuit a detailed analysis of hardware circuits, software design and then describes the functional requirements and communication protocols; Finally, the Markov model calculations and fault tree analysis of main line switch control unit reliability, security, maintainability and immunity detailed assessment and verification test results showed that the control unit in line with the positive side of modern tram line control device switch rail safety standards.Line Turnout control unit has completed a preliminary design of the simulation tests proved that the control unit is able to meet the modern tram system control switch conversion needs, but also has a small, full-featured, stable performance, good effect, etc., there is a strong practical value.