Design And Realization Of Balise Programming And Testing Device Based On Embedded Systems

Balise is one of the main equipments of information transmission between train and the ground used in CTCS level 2 Train Control System. Wayside equipment of balise consists of fixed-data balise, transparent-data balise, line side electronic unit (LEU) and balise programming and testing device. The task of programming, maintaining and testing LEU and balise is mainly completed by balise programming and testing device.Research work in this thesis was focused on the followings:Firstly, a scheme of a new design of function requirements for the balise programming and testing device was introduced based on the careful analysis and research of related equipments which have been applied in domestic. Functions of current domestic product were realized, and the simulation of the related equipment functions in balise system was proposed.Secondly, the implementation plans of the balise programming and testing device were presented, and then a detailed analysis of hardware design and debugging was proposed.Finally, the accomplishment of the main function of balise programming and testing device, including the task scheduling function, the text input function, the equipment communications function and the telegram storage function, was analysed. In addition, the concept of coordinating the objects was introduced in reference with the task scheduling function and the text input function. Practice verified that such kind of method was highly effective and feasible, and it could realize the design concept of simplifying equipment manipulation and make the interface friendlier. The key-scanned function based on Timer-interrupt could also provide convenience for the two functions discussed above.Tests proved that it was feasible to carry out the hardware and software realization scheme, which could guarantee realizing all the functions of balise programming and testing device.