| Railway is an important infrastructure for Chinese economic development.Train operation control system is the core system to control the safe operation of train.Train positioning is a key technology in train operation control system and it plays a very important role in achieving the safety of train control.The train positioning technology can ensure that the train operation control system obtains train position information accurately and timely,thereby it is more effective to control the train and improves the transportation efficiency.With the development of technologies such as satellite positioning,digital maps,and geographic information systems,more and more advanced technologies can be applied to train positioning.This thesis aims at the problem that digital maps and geographic information system technologies are rarely used in the field of train positioning,and start the research on the use of these two technologies for this system has reference significance for improving the level of train positioning technology.This thesis,which is on the basis of the analysis of domestic and foreign train positioning technology,a digital track map based on GIS is designed for the train operation control system.Through linear reference,dynamic segmentation and related GIS technology,combined with Arc GIS Engine,a digital track map simulation platform for train control was designed and developed.By analyzing and summarizing the positioning and matching algorithms currently widely used in highway traffic and combining with the characteristics of Chinese railway lines,a new positioning and matching algorithm for train is studied and designed.Then the algorithm is verified on the simulation platform.The main research contents of this thesis are as follows:1.A digital track map simulation platform system for train control based on GIS was designed.This system uses Arc GIS Engine as a secondary development platform,which can display digital track map designed by Arc Map,and implement various basic functions of digital maps.Secondly,the train positioning and map-matching algorithm proposed in this thesis can be verified.And then,specific research and analyze components of the system,including the specific functions of each module.2.By summarizing the characteristics of Chinese railway lines,linear reference and dynamic segmentation techniques are used to construct a linear reference system.The linear reference system is used to better display the train control information of train control digital track map,including balise,signal machines and line gradient etc.3.Geodatabase is the data basis of the digital track map.Before constructing the digital track map,the geodatabase needs to be designed.A Good database design is the key to accurate digital track map data.The geodatabase is an object-oriented database.When designing the database,we should strictly follow the traditional object-oriented database design process.The difference is that this kind of database storages space information,which contains spatial data and attribute data of object attribute information.Finally,designing map with Arc Map.4.By extracting and processing the simulated positioning information of the train as the data source of the map-matching algorithm,combined with the characteristics of the lowcomplex interval railway line and the railway line data which stored in the geographic database,a new type of map-matching algorithm for train is designed.The algorithm is used to test single track,parallel track and curved track.This algorithm can correct the train position and it is verified on the train control digital track map simulation platform.5.The simulation platform uses component development technology,uses Arc GIS Engine as the secondary development platform,and uses Visual Studio 2013 and Arc GIS10.2 as development and design tools.In the environment of.NET4.5 by using C# language,and MVC design pattern to finish the design and the development of the simulation system. |
PDF Full Text Request