Computer Aided Design For Railway Yard Signal Layout

Railway signal yard is a reflection of the layout, pickup direction and start direction of yard.It determines the location of signal buliding and the scope of the concentrated interlocking area, and also indicates signal name,switch name and their position, divides sections for track circuit,the computer interlocking circuit is designed basing on it, the signal engineering design and construction is in the light of Railway signal yard which is the important basis of compiling interlocking table. Interlocking table is expressing the interlocking relationship for switch,track and signal in the whole yard.It is the basis of the circuit design,interlocking test is also based on it before using.Signal design portfolio is growing because of the rapid development of railway,so we put forward higher request for the drawing of signal yard.The traditional drawing mode is through the CAD software or input data manually to realize.But every software is independent and information is not sharing,so the yard is modified frequently leading to the increased a lot of repetition of work, and not improving the design efficiency fundamentally. therefore, it is necessary to develop a set of design system, for enhancing work efficiency and meeting yard design requirements.The article introduces the signal equipments layout, equipment naming,numbers and each column content of the interlock table,and using MFC technology of Visual C++ for computer aided design.This paper points three modules to complete.Firstly is to design and implement basic equipments of yard,through the analysis for the characteristics of each signal equipment, the signal, switch and other signal equipment are designed to basic graphic form.Secondly is to realize the graph editor and windows processing functions,Including the selection, mobile,delete operation and window scrolling and redrawing,and then draw yard.Finally,according the data provided by drawing yard,the yard is abstracted into computer figure and recognize track information Including the rail section information, the train route information, shunting into road information and hostile signal recognition, and then information of identification is filled in the path of a table, generating interlocking table.