Simulation And Research Of Encoding And Decoding Of The Balise Telegram Based On The CTCS-2

In recent years, the railway of our country developted very fast, in the passenger transportation special line and the high-speed railway's construction, the balise obtained the very widespread application. The balise sents the state information of the roads which is in the fornt of the train to the train by the form of telegram, the train receives the information and analysises it, forms the reasonable velocity curve in order to guarantee safety. The balise plays the very essential role in guaranteeing the high speed movement of the train and safety. Simulate the train control system, the CTC system and the interlock system is useful to reduce the debug cost, raise the work efficiency and helpful to our study by the network, database and software programming.As for the above vitue, the traffic control laboratory of Southwest Jiaotong University has developed a CTCS-2 train control simulation system independently based on the CTCS technology standard of our country.This simulation system including the following several subsystems:Train Carried Equipment Simulation subsystem, Ground Equipment Simulation system, Virtual Driving subsystem and Data Management system.This thesis is based on a subsystem of "the CTCS-2 Train Control System Simulation". The author introduces types of the balise and its working principle at first, The balise mainly divides into the active balise and the passive balise, The active balise sents the invariable information to the train while the passive balise sents the static information.And then the auther introduces how to arrange the balise on the railway and the data area of the balise. This part mainly discusses the arrangement principle of the sector balise, the balise in the enter and exit, the balise in the transformation place of the CTCS.The balise data area has divided into three types:the train moves in nominal direction and reverse direction, the train moves in the station, the transformation place of the CTCS.Combining with HeNing line's essential data, he also introduces the constitution of balise telegram and the data extraction method in detail, this part is the key of this thesis.Under the guide of tutor, the author refers to the CTCS technology standard and the user data sheets of HeNing line, achieve the coding and decoding software using VC6.0. This software can extract the data of balise, encrypt data and decrypt data, verify the transmissed data. Finally, the processing of each subsystem is shown.