Research On Some Technology In Railway Stations Computer Interlocking System

Railway Stations Interlocking System is the interlocking system which realizes restrict and operation sequence between signal, turnout and route by technical method.With the railway net expanding and railway speed increasing, it is a necessary trend to develop a railway stations interlocking system with more advanced technology.After studying railway stations interlocking system, the paper makes three researches on the communication technology, the route control technology and the distributed information management technology of computer interlocking system, according as the requirements of modern stations interlocking system, making use of the advanced computer technology, information technology and network technology.The dissertation consists of five chapters. The first chapter introduces the concept of computer interlocking system and the developing way and research actuality of domestic and overseas stations interlocking system.The second chapter recommends the structure of computer interlocking system which lays the foundations to makes three researches below.In the third chapter, the paper makes two researches on the communication technology and the route control technology of computer interlocking system. At present, the developing software of computer interlocking system is mostly C, VC++ and Delphi which are related to platform. We have not seen the interlocking control software written in Java. So the author tries to write locking control software in Java. First of all, the Java2-base PC serial communication programs and PLC serial communication programs are written. The Java2-base serial communication between PC of the interlocking logic layer and PLC of the collection drive layer is realized. Then the process of route control is discussed. The strategy of route search is given which consists of four search strategies. According as the search strategy, the arithmetic of route search is written in detail. In the end of the chapter, the route control programs are written in Java and the graphics interfaces of route console are designed.In the fourth chapter, the paper makes a research on the distributed information management technology of computer interlocking system. At present, there are manyproblems such as information share difficult and information distributing irrational in the information management of stations interlocking system. Therefore, in software, the author tries to realize distributed information management in J2EE again. It adopts Weblogic Server8.1 as J2ee server and Jbuilder9 as development environment. The development of system is made up of EJB development and Web application development. The development of Web application adopts the Struts frame and the development of EJB adopts Session Facade design model. According as it, the author designs and develops a distributed information management system in computer interlocking system and gives the design of system interface.In the fifth chapter, the author sums up the full paper and scientific research fruit obtained.