Speed ​​line Precision Measurement System Technology Research

After a period of orbital operations, the deformation must occur in order to deviate from the location of the original design, resulting in wavelength.The non-cpmfort and danger caused by wavelength is enve greater after raising train speed.Therefore, the line must be maintenanced after a period of time in operation. The traditional use of line maintenance is the "relative operating method". this method is to adjust the geometry lines and restore the relative position. It can only achieve the basic smooth,and can not completely eliminate the lines's deviation of the direction.For the inadequacy of traditional methods as well as the existing railway line after the acceleration of the higher conservation requirements and combining with the latest research at home and abroad, this paper studied the case in the speed of the track of the precision measurement technology, has achieved the following results:(1) Measured from high-speed railway control relevant experience, developing a control measurement of raising train, and analysis of accuracy. Compared with the high-speed railway, relaxing on the standards such as relaxing the CPIII control points's space from 60m to the 120m.(2) Seting out the existing line to the method of precision measurement. Especially introducing the new method of the "Total freedom of overlapping station". Precision measurement of the detailed implementation plan to carry out an in-depth research process in some of the precision of control measures.(3) Leica TCA2003 robotic measurements as the carrier, developed an appropriate measurement procedure for the precision measurement of both line operations and reduced the manual strength, which reduced the impact of human error.(4) The data fitting problem were studied for the measurement data of exist raising speed line.Using the minimum distance to the geometric principles method to fitting measurement data. This fitting method with the existing line of conservation of the normal requirements of the smallest deviation in line to reach the very good fitting results. At the same time, introducing the stability of the estimated method, exclusing the effective of almost rough measurement to improve the science and rationality of fitting.(5) The establishment of the existing line of development of fitting a database of procedures for the next large-scale road maintenance machinery to provide optimized operation of conservation data, to guide its conservation work.Speed of the system to guide the application of line maintenance operations, can be a very good smooth lines to meet the speed requirements. It has the value of good conservation for the current speed of China's largest railway circumstances.