Design And Implementation Of Intelligent On-board Subsystem Of Modern Tram Based On GNSS_CAN₃G

With the constantly improvement of the urbanization level,more and more people swarm into large and medium-sized cities,the urban traffic is facing great pressure and challenge.The excessive increase of the number of the car,traffic jams,air pollution,noise has become the main problem for the development of modern cities.To solve the above problems,the world’s big cities strive to develop the subway or light rail to ease traffic pressure.However,due to the huge investment and long construction period,brings new problems to the development of urban public transport.Modern tram emerge at a historic moment.Tram is a light rail transit vehicles running on the rail with lots of significant characteristics such as low noise,low vibration,environmental protection,comfort,etc.It needs to have a customized signaling system which includes on-board system,trackside system,operation and dispatching system and communication system to ensure that modern tram run punctually,efficiently,comfortably and safety.Among these systems,the on-borad system is an important part of modern tram signaling control system.This thesis studied on the on-board intelligent control subsystem which based on GNSS with multi-frequency and multimode,vehicle information monitoring on CAN bus,3G wireless communication technology.The subsystem is through the accurate positioning,real-time monitoring data and running status information of tram,forms the intelligent signaling system of modern tram together with the other subsystems.The significance of this study is to put forward a set of effective solution in the aspect of vehicle positioning,vehicle information monitoring and wireless communications for urban tram,and it has passed test and been used in Shanghai zhangjiang trams signal upgrade project,and will be developmented in the future in the process of continuously upgrade and promotion.