Research On Automatic Generation Software Of Railway Interlocking Table Based On AutoCAD

With the rapid development of China’s railway,the computer besed interlocking system is gradually replaced by the traditional relay interlocking system to ensure the safety and efficiency of railway operation.As the illustration chart of interlocking relationship of equipment in station,railway interlocking table plays a very important role in signal engineering design,and it is also the basic basis for testing and acceptance of computer besed interlocking equipment.At present,most of the railway interlocking tables are compiled manually,which is inefficient and cannot guarantee the reliability of railway interlocking tables.The Railway Corporation issued a new interlocking table compilation specification Q/CR654-2018 "Principles for the compilation of computer based interlocking station interlocking diagrams" in 2018.This specification adds some definitions and other types of approaches on the basis of the original compilation principles.At the same time,it also stipulates many places that require human intervention.This thesis analyzes the structure of railway station yard,computer based interlocking conditions and compilation principle of railway interlocking table,and takes the data file of station signal plane layout in unified format as input for analysis and reading.The data structure of different types of signal equipment in the station is defined and the station type data structure is established.The automatic generation algorithm of railway interlocking table is designed,and the automatic generation of route data of railway interlocking table is completed with manual intervention.Finally,the data of railway interlocking table is output in the form of CAD interlocking table.The main research work of this thesis is as follows:(1)The unified format data file of station signal layout plan is analyzed,and the station information such as signal,switch,insulation joint,section and direction port is read.According to the requirements of route generation of railway interlocking table,the data structure of station equipment is defined,the obtained station information is input and redrawn,the connection relationship of each signal equipment is judged,and the station topological structure is constructed with the signal equipment as the node combined with the idea of graph theory.(2)According to the principle of railway interlocking table compilation,the depth-first search algorithm with constraint conditions is used for route search on the station yard network topology,combined with the processing of route interlocking information,including over-limit section inspection,turnout driving and protection,and route Hostile signal judgment,etc.,automatically generate train entry interlocking table,shunting entry interlocking table,continuous entry interlocking table,combined train entry interlocking table,and non-access shunting entry interlocking table.(3)The man-made interactive interface is designed to input the special station information and control the route,and the access of station data and man-made operation record data is realized in the form of text file.Finally,using Active X interface to call Auto CAD program,the route data of railway interlocking table is output in the form of Auto CAD interlocking table.The work of this thesis is based on the new railway interlocking table compilation standard,which is suitable for the automatic generation of interlocking table in ordinary railway station and high-speed railway station.At the same time,it can be controlled by human intervention.Finally,the standard format of interlocking table Auto CAD file is directly generated,which is of great significance to improve the compilation efficiency of designers.