Research On Data Processing And Software Integration Of Ballastless Track Base-piles CPⅢ

At present, the railways construction is walking into a new period of high-speed railway construction in our country. Precise engineering survey technology can provide the important guarantee for it.In the thesis, the primary investigation objects are the network and observation technique of ballastless track base-piles Control Points III(CP III), the precision estimation for CPâ…¢and accuracy indicators of surveying instruments in field measuring, and the adjustment method of CPâ…¢and corresponding software development of data processing. Based on the discussion of surveying theory related to data processing of CPâ…¢, the function design and development of data processing software is performed. The following aspects are implemented.Firstly, the field measurement method is improved by analying the characteristics of the CPâ…¢network. The rationality of some accuracy indicators in "temporary prescript" is assessed. Based on the nominal precision of surveying instruments used in CPâ…¢, the a priori estimation for positional accuracy and relative positional accuracy among points is calculated. The mathematical models and formulae of precision evaluation of three adjustment methods of CPâ…¢are deduced. All the above work will be the foundation for the development of the software.Secondly, aiming at the functions of the data processing software, the development principles, goals, framework and chartflow are confirmed. After accomplishing partial function modules, the technique of software integration is used to integrate these modules and a CPâ…¢data processing software is fulfiled.Thirdly, to analyse the quality and precision of CPâ…¢data, a method is introduced to find and eliminate the low quality observations. Then, by comparing the results of the establishment measurement and the repeation measurement of CPâ…¢network, the possible problems are discussed and emphasized.