| In recent years, the country promoted the development of urban rail transport vigorously, it impacted increase economic growth and relieve urban congestion. In the constructing or constructed line of every major cities, a large number of modern train control system applications to ensure that the subway line operation fast, efficient and safe. My graduation design topic is the research and design of on-board automatic train protection system digital signal collecting module.This article starts from introduce to domestic and international development status of urban transport, composition of urban rail transit automatic control system. Then, it summarizes the basic principles, functions and structures of train automatic train protection system. It analyses the input and output of module and its operating environment requirements based on on-aboard protection system digital signal collecting module mission requirement. The hardware platform of digital signal collecting module has a detailed design; it includes all used DSP chips and external electro circuit set, such as power supply section, communication section, digital collection section and the other sections have been designed. Combining with assembly language and C language, use of CCS software platform and modular design, I did the software design for the digital signal collecting module based on the clear principles and method for each module. Finally, I did the functional and performance of the modules test to demonstrate its capabilities. In addition, it prospects the development of urban rail transport automatic control system.To achieve a fast and accurate digital signal information transfer to on-board automatic train protection system operation unit by the unit cell module to be used for the train control. This research is applied to computer, communications, DSP, information processing and the other subject field knowledge. It integrates theoretical and practical, technical research and engineering design. The final test result shows that the system is stable, good performance, the design of digital signal collecting module is expected to complete the work, and the each indicator has reached the desired design requirements. |
