Free station setting method based on overall disc position measurement

Abstract

The invention provides a free station setting method based on overall disc position measurement, aiming at effectively improving the elevation station setting precision and meeting free station setting requirements so as to improve the station setting efficiency and the station setting stability. The free station setting method comprises the following steps: (1) selecting a proper position; erecting a total station and then leveling; (2) manually aiming at two back-sight points and then carrying out the overall disc position measurement on the back-sight points needing to be observed; (3) calculating a direction value, a distance, a vertical angle and a vertical disc index error; then carrying out three-dimensional compensating computation to obtain coordinates, precision and coordinate azimuth angles of station setting points; (4) carrying out constant weight iterative computation again according to a correction number until weight is not changed any more; outputting the coordinates,the precision and the coordinate azimuth angles of the station setting points, which are obtained by the three-dimensional compensating computation, of the station setting points; and (5) after the station setting is finished, carrying out vertical disc index error correction when a front-sight point is measured through a single disc position and then calculating a three-dimensional coordinate ofthe point.

Description

technical field [0001] The invention relates to surveying and mapping technology, in particular to a free station setting method based on overall position measurement. Background technique [0002] At present, the free station setting of the commonly used total station generally adopts the self-contained program of the total station to set up the station, and the total station requires that the free station setting can be realized under the leveling state. The half-panel total station measures more than two known points, and uses the resection method to calculate the coordinates of the set point. At the same time, according to the "Specifications for High-Speed ​​Railway Engineering Survey" (TB10601-2009), usually when the total station is free to set up a station, the over-limit points can be manually removed as needed, and then recalculated until all indicators meet the requirements. At present, the self-contained program of the total station often uses the half-panel met...

AI Technical Summary

Problems solved by technology

At present, the self-contained program of the total station often uses the half-panel method to set up the station freely. If the vertical index of the total station has a large difference, the real elevation of the station is quite different from the actual elevation, which does not meet the requirements of free station establishment.

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