Electronic System Of Double-track And Double-direction Automatic Block

In the21stcentury, along with the rapid development of the computer technology,communication technology and automatic control technology, the railway signal equipmenthas also entered into a rapid developing period. At present, the development of the railwaysignal equipment is towards information, intelligent and more humanity, especially intervalblock equipment, which had experienced early stages of artificial block and semi-automaticblock device, is now in the developing direction of automatic block equipment. Compared tothe train control center of CTCS2/CTCS3, relay automatic block equipment has shortcomingsof low efficiency, high failure rate, huge volume, complex wiring and has been widelyadopted in the controlling of intervals in most of Chinese existing CTCS0/CTCS1. Therefore,this paper puts forward the electronic implementation scheme of CTCS0/CTCS1intervalcontrol system.With the section between Sanji and Lingshou as prototype,a set of electronic automaticblock system has been exploited and designed. Based on the relay logic relationship oforiginal ZPW–2000A type automatic block system, this system has realized train control ininterval operation by the software. The simulation test platform includes host of intervalcontrol, simulation system of home station, simulation system of adjacent station andmonitoring terminal of microcomputer. The development of simulation system of homestation was mainly completed in this paper.The background about subject research was introduced at first. The automatic blocksystem was elaborated in the following. According to the functional requirements ofelectronic system of double-track and double-direction automatic block, referencing6502distributed control thought and train control center of CTCS2/CTCS3, a technical scheme ofthis system was put forward.The realization of the simulation system of home station was focused on, introduced anddescribed in this paper. Software and hardware technology was applied to simulate computerinterlocking function in simulation system of home station which take Sanji station ofShenhua railway as prototype. It mainly includes computer interlocking function simula tion,external device emulation, external equipment data acquisition and driving, communicationwith interval control host.In software development, VC++6.0which is popular nowadays, was ued to design anddevelop a set of computer interlocking simulation software. The software can implementsimple route setting, signal indication and real-time communication with the interval controlhost.In terms of hardware design, advantech PCI-1761board, JYXC-270polarized relay andall-electronic relay acquisition module(JCJ)were used to complete acquisition and driving of direction relay and interval track relay.By testing, the home station simulation system which was studied in this thesis canrealize its basic function and achieve anticipated targets. In late online debugging, this systemcombined with interval control host, adjacent station simulation system and microcomputermonitoring terminal, can preview the process of electronic automatic block system. Thedesign of this system can provide certain technical support for reconstruction of existing lines,which has big practical significance.