A Calculation Method for Measuring Unknown Track Points in High-Speed Railway Track Unevenness
A technology of high-speed railways and calculation methods, which is applied in the direction of tracks, measuring instruments, track maintenance, etc., can solve problems affecting the progress and efficiency of track fine-tuning, and achieve the effects of easy program design, easy promotion and use, and high precision
Active Publication Date: 2020-10-30
XIAN UNIV OF SCI & TECH +3
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Problems solved by technology
The point coordinates obtained by the total station in the survey of the free station method are the station center coordinate system, that is, the phase center of the total station is taken as the origin, and the left-hand space Cartesian coordinate system is established. The range of each station measurement in the free station method is relatively small. It is small and requires multiple placement of the leveling instrument, which means that the measurement requires multiple leveling of the instrument, which will seriously affect the progress and efficiency of track fine adjustment
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[0024] Such as figure 1 and figure 2 As shown, the calculation method for measuring the unknown point of the track under the uneven state of the high-speed railway track of the present invention comprises the following steps:
[0025] Step 1, free erection total station: select 1 CPIII control point 1 altogether on both sides of high-speed railway track 2, freely erect total station in the area between 1 CPIII control point 1, wherein, I is not less than 3 a positive integer;
[0026] In this embodiment, the value range of I in step 1 is 3-10.
[0027] In the present embodiment, one CPIII control point 1 is respectively arranged on the guardrails on both sides of the high-speed railway track 2 in step one.
[0028] In this embodiment, the CPIII coordinate measurement of free station for uneven measurement has the same accuracy and higher operating efficiency. When the superelevation of the high-speed railway track reaches a maximum of 17cm, the accuracy can still reach the...
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The invention discloses a calculation method for measuring a rail unknown point when a high-speed railway rail is in an uneven state. The calculation method includes the steps of 1, freely erecting atotal station; 2, establishing an observation equation set between an instrument center point of the total station and a CPIII control point; 3, determining an error equation between the instrument center point of the total station and the CPIII control point; 4, calculating a three-dimensional coordinate of an instrument center point p on a CPIII coordinate system; and 5, calculating the rail unknown point of the high-speed railway rail. According to the calculation method, a national coordinate of the CPIII control point is taken as a reference, the instrument center point of the total station is considered as a phase center, so that the error equation and a weight matrix of spatial distance are constructed, then the CPIII coordinate of the instrument center point of the total station iscalculated through using a least square principle, and finally the coordinate of the rail unknown point can be obtained through a polar coordinate method.
Description
technical field [0001] The invention belongs to the technical field of calculation of track unknown points, and in particular relates to a calculation method for measuring track unknown points in an uneven state of a high-speed railway track. Background technique [0002] In the process of high-speed railway track fine-tuning measurement, the coordinate system to which the high-speed railway track fine-tuning belongs is the national coordinate system, that is, the CPIII coordinate system. The free station setting method, and the free station setting method of the total station obtains the station center spherical coordinate system, so the coordinates in the station center coordinate system need to be transformed into the CPIII coordinate system through the coordinate transformation method. The point coordinates obtained by the total station in the survey of the free station method are the station center coordinate system, that is, the phase center of the total station is tak...
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IPC IPC(8): E01B35/00E01B35/08
CPCE01B35/00E01B35/08
Inventor 马下平罗文斌张中成林超才景慧
Owner XIAN UNIV OF SCI & TECH