Design And Implementation Of Railway Station Map Data Generation Software Based On Custom Entity

With the rapid development of our country’s railway industry,the workload of the signal design industry is also increasing.The signal layout of the station is the basis of railway signal design.It can reflect the layout of outdoor signal equipment in the station and is the data source for subsequent engineering design.Most of the station layout plans in the railway signal industry are drawn with AutoCAD software.This software is currently the most widely used computer-aided design software with the largest number of users.It provides basic CAD functions and can draw graphics based on relevant data.The design task of traditional station signal layout drawing is arduous,and there is a lot of work to achieve partial adjustment of graphics.At present,the output of domestic signal design is increasing year by year.Railway signal computer-aided design software needs higher efficiency..At present,the design specifications of the railway signal design institutes in China are different,and the data generated through the station yard diagram cannot be integrated.If the signal auxiliary design software developed by AutoCAD is used,the station signal layout drawing is completed through a custom entity,and the entity is set according to the need.The attributes of the station and yard map data can be standardized,and can be directly applied to other interlocking software,which can improve the efficiency and quality of the design.This thesis compares the advantages and functions of different AutoCAD secondary development methods,combined with the characteristics of the railway station signal layout,and finally chooses ObjectARX based on C++ as the secondary development tool,which provides an object-oriented development environment and application.The program interface can quickly access the AutoCAD graphic database,and use its custom entity function to design signal equipment entities such as signal machines,turnouts,and switch-free sections in the station signal layout diagram.Through the MFC technology and the MFC class library provided in the ObjectARX development kit,a standardized drawing tool with friendly interface and simple operation is designed,so that it can complete the drawing of the station yard map and set and modify related attributes,and improve the station yard map data.Finally,according to the information of the station map,the signal data required by the interlocking system is derived,and the data input is provided for the automatic generation software of the interlocking table and the automatic generation of the interlocking control data,and the integrity of the data is verified based on the example station map of high-speed rail and ordinary rail.Through the secondary development of parameterization and standardization,according to the attributes of the custom entity,the interlocking data required for engineering design is automatically generated during the process of drawing the station yard,which further improves the design efficiency and the automation degree of the station engineering drawing,is of great significance to the railway signal design industry.