Electronic Two-way Automatic Block System-Key Technology Research

Thesis mainly complete the interval digital transformation of CTCS0and CTCS1whichthe speed is below160km/h. Completed the hardware platform construction of the intervalcontrol host and software. Existing lines of C0,C1interval control mostly adopts the methodof relay combination, the fault location of the equipment is very difficult, and so is themaintenance. It will significantly affect the interval operating efficiency. With the continuousdevelopment of science, new communication and electronic technology will solve theseproblems, make the train running more reliable, efficient and safer.The interval control host,which the paper mainly studies, adopts double2-vote-2safecomputer hardware platform, the main function is:(1) Implement the coding function to each block section and controlling the transmissiondirection of orbital information.(2) Implement interval two-way operation, reverse adopts automatic station occlusionmodel.(3) Interval signal control.(4) By2M port to implement the secure communication between stations.(5) control block post.Host adopts real-time multitasking operating system of VxWorks. It consists of a smallsize of the kernel, and some can be customized system modules according to the need, such asthe supporting of network communication, C++programming language, etc. It is very good tocomplete the requirements of interval control system to real-time performance, safety andreliability.Interval control host communication mainly consists of two parts:1.making the stationsimulation system, adjacent station simulation system and the microcomputer monitoringsimulation system communicates through the Ethernetï¼›2.All electronic execution modulecommunicate with the host through CAN bus. It includes of JCJ,JQD,LXA and ZDM.Through this method, host can control field devices and receive the feedback data.Interval control system of C0/C1adopts a3shows or4shows automatic block system.System mainly consists of automatic block circuit and changing direction circuit. Automaticblock circuit use ZPW2000frequency-shift automatic block circuit as the object, andchanging direction circuit use four-wire changing direction circuit as the object to doelectronic transformation. Program adopts the modular design, according to the real intervalabstracts track circuit module, block section module, interval control module, the stationsystem module, adjacent station system module. With these modules, the system can beassembled freely according to the different interval. The main ideas and standard of the changing direction circuit all reference the four wire changing direction circuit. On the basisof it, relay and the process of changing circuit are downsized. In guarantee to the logic ofchanging direction safe and reliable, makes the system more efficient and fast.Interval control system using CTCS2train control system for reference, adopts thescheme similar to the interval control system to control the interval. According to thecommunication protocol, interval control host receiving the data from station, adjacent station,and the data collected from the scene, and then make a comprehensive logical operation. Thecontrol information via the CAN bus sent to the field device, to control the interval signalpoint correctly light up and send code, so to ensure driving safety. According to theagreement, interval control host send the information to the station and the adjacent stationand computer monitoring system via Ethernet, and using synchronized control at the sametime.Under the trend of electronization of the railway signal, this system has importantreference value in the engineering cost, safety and reliability, and transition of ordinary rail tohigh-speed rail.