Automatic Generation Software Implementation Of Interlocking Table Based On Primitive Model

As the functional specification of computer interlocking system,the interlocking table plays an important role in ensuring the safety of train operation at stations.The first step in designing the interlocking system is to design interlocking table.But at present,part of the interlocking table is compiled and audited manually,which is easier for small stations or railway freight yards.However,when the station structure becomes complicated,because of the complexity of computer interlocking system and human interference,it becomes very difficult to generate interlocking table quickly and accurately,which makes the generation and audit of interlocking tables inefficient and error-prone.Therefore,how to develop a system with high reliability,high security,convenient and fast automatic generation of interlocking table,through the complete system property configuration,the system can accurately output the interlocking table matching with the existing interlocking system,which is one of the most important matters that the current interlocking system needs to be solve.Combining the technical conditions of computer interlocking,this thesis studies the interlocking logic of route control process,puts forward the general interlocking design rules suitable for station layout of different stations.On this basis,this thesis establishes graphic model for various signal devices,develops graphic interface for describing different station types,generates station-type data of different station and yard types.Through the generated station-type data of station and yard types,the station is searched by the highly non-round-trip search algorithm combined with interlocking rules,and all route interlocking information is obtained.According to the generation requirements of interlocking table,the searched route is saved in EXCEL and AutoCAD files to realize the automatic generation of interlocking table.The main functions of this thesis are described below.(1)Through the graphic description of signal equipment and the definition of related signal equipment's graphic combination,the graphic model is designed for basic signal equipment such as signal machine,track section,switch,etc.,which realizes the function of station and yard plan design and drawing.This system enables the station designers responsible for data development in the interlocking system can quickly build a visual station layout by using the system,which matches the original station design drawing,so that the software can be visually developed.(2)Based on the analysis of different signal equipment types,this thesis describes the class diagram structure of signal equipment with interlocking system as its parent class andspecific signal equipment(signal machine,track section,switch,etc.)as its subclass.The class diagram structure is mainly based on inheritance relationship.According to the class diagram structure,the transformation from station graphic description to station topology description is realized,which provides reliable data support for the later automatic generation of the interlocking table.(3)Through the analysis of the station topological structure,the high-level non-round-trip search algorithm is used to search all train,shunting and successive routes.Combining with the topological structure,the complex interlocking relations such as condition conflicting,route point change and mid-switch are dealt with.(4)Finally,the visual station platform model is demonstrated.The interface between C++ and AutoCAD and EXECL is realized by using ActiveX and ADO technology.The generated interlocking logic information is output by file,which means interlocking table is automatically generated.