Simulation And Research On Active Balise Telegram Programming And Analysis In Passenger Railway Lines

Balises are widely used to transferring the spot message to train in the modern signal system of rapid transit railway, because they’re the most important transmission medium for dot mode between train and floor. Balise telegrams contain a variety of static type information and dynamic information of the lines in front of train movement, producing the safe transmission telegram in the form of the binary through the main steps such as encoding and encryption, and the dynamic information will be sent to the train control equipments on the train. After receiving the information, the equipment decrypt and analysis the telegrams, then got large volumes of line base information and the data from train operation, those messages could be sent to the board ATP equipment for producing distance to go mode curve. The consecutive braking curve model can ensure safety of the running train, shorten the distance between adjacent trains to the minimum and improve transportation efficiency.Active balise telegram mainly includes train route information and TSR information, using the electric cable to connect the active balise with train control center on ground, which contains dynamic information template, real-time controls and selects the corresponding transitive balise telegrams. The thesis is mainly based on the off-line data system of train control center, and researches the works about telegrams encoding, decoding and analysis of active balise. Firstly, the paper expounds its main structure, port design, the principle of numbers and names, then summarize the balises’decorate principle for the passenger railway lines, lay emphasis up on the catenation relation and data coverage of active balises, which covers the active balises located in the position of get in station, get out station,in the front of the starting signal machine and the turnaround route signal machine. Secondly the thesis also analyses user’s data sheets, structure and type of user message, main user message packet and form of information packet. Finally, the paper simulates each subsystem through the platform of Microsoft Visual Studio2008,including the store, analysis processing, data fetch, coding, encryption, decryption, checking out, analysis of the telegram data packet and dealing with the TSR message, the author refers to the project data of the passenger railway line from baotou to xi’an city for testing and verifying, which ensures feasibility of the software. Systemic theory analysis and simulation about programming and analyzing message mean too much reference for balise telegram in passenger railway lines and revising technology standard. The thesis expounds the basic theory, simulates and realizes each subsystem such as encryption and decryption, encoding and decoding, verify and analysis of active balise telegrams, and it reaches the purpose of each subsystem function referring to the technology standard and project data.