Research And Implementation On Graphics Regeneration Technologies For The Under-Rail Verification Of High-Speed Railway

High-speed rail measurement and verification should be takenthroughout the life cycle of high-speed rail in terms of the design, construction and operation, only when the train runs on a reasonably designed, normatively constructed, and efficiently managedrailway could ensure the smoothness and safety. Precise measurement and verification are the foundation and one of the important roles to ensure the quality for high-speed rail project. Under the premise of guaranteeing the verification quality, practical, flexible and efficient measurement and verification technologies could extremely shorten the period of measurement and save a lot of manpower and material resources, improving the quality and accelerating the progress of the overall project, meanwhile, risks on the design and running processcould be found in advance.Based on the analysis of domestic and international studies on high-speed rail measurements and verification, this paper studied the data processing and graphics regeneration regarding high-sped rail line’s verification heterogeneous data from the perspective of the development of verification system standing in the fact that it was difficult for the current large-scale advanced instruments to reach to the special areas before project completion.Numerical calculation methods for various curve parameters and generation algorithms for horizontal and vertical alignments around high-speed rail line’s verification were established. Detailed contents of this study are listed as fellows.Firstly, one finite automata model was built to process multiple heterogeneous data sources according to finite automata theory studied in compilation principles based on the analysis of data source coming from the institute. Secondly, intelligent methods of calculating all parameters for the horizontal alignment and vertical curve were achieved through the research of basic principles and methods for road design and measurement theory.Afterwards the graphics regeneration methods were studied. On the basis of researching, the regeneration algorithms of the plane straight, the plane circular curve, the plane transition curve and vertical curve were designed employing approximation theory, VTK technology was adopted to classify above alignments, which were class LevelRailLine, class LevelRailArc, class LevelRailSpiral and class VerticalRailLine. Finally, a software GUI window was developed by the usage of Qt technology, CMake and Visual Studio 2010 were separately employed as configuring tool and compilation tool for the project. Besides C ++ language was applied to develop related test program, the precision of calculation methods, the regeneration algorithms and other researching achievements were tested utilizing the designing data for one on-built high-speed rail, additionaly, these generation algorithms worked correctly and accurately.