Development Of Railway Survey System Based On Android And RTK

With the development of big data,cloud computing,artificial intelligence and other high and new technologies,domestic and foreign railway systems have been developing in the direction of intelligence and digitalization.Railway survey and design is an important part in railway construction.From drawing design to project landing,it affects the construction of the whole railway.Among them,railway survey and engineering survey are inseparable,and the measurement means restrict the efficiency of railway survey.At present,domestic scholars seldom study the railway field survey system.And the measuring software used in the actual work is all developed by the measuring instrument companies.But these software is not only for the railway field survey,so there is some inconvenience in the actual measuring operation,which affects the measuring efficiency.At the same time the hardware and software of each major manufacturer also has the compatibility problem.To improve the efficiency of Railway field survey work,relying on China Railway Eryuan Engineering Group in scientific research project,combined with the standard and the actual work needs,field collection for Railway operation mode,using RTK measurements,based on the Android mobile terminal,this research will design and develop a set of general Railway field survey system RDGS(Railway Data GNSS Software).Further more,basing CAD integrated function,it can be drawn directly on the base drawing to facilitate the measurement work.The main content of this thesis has the following three aspects.1.This research introduces the programming knowledge involved in Android development and identifies the relevant development techniques used for this system.Comparing the Android development model,this research selects the component-based development model and designs the corresponding system framework.This thesis analyzes the application and selects the appropriate measurement formula model.2.Combined with the railway engineering measurement specification and actual operation requirements,this research designs different functional modules to meet the needs of field operators and designs the reporting point function.This thesis uses CAD development related technology to integrate basic CAD functions in this system as the basis of the measurement function module,which not only can import the base map in dwg format,but also can perform CAD operations on it.According to the data flow in the measurement operation,this research designs the corresponding data parsing and coordinate conversion calculation functions,and RDGS is designed for connecting the mainstream GNSS receiver of Zhong Hai Da and South Survey manufacturers to improve the versatility of the software.The data saving format is also designed for the post-processing software.3.Based on the system design integrated programming to implement the RDGS software,this research compares other commercial software,analyzes the measurement data results of this system,and tests the system accordingly,and finally concludes that this software can be used for actual measurement production.