A method of surveying and mapping railway curves based on satellite positioning

Abstract

The invention relates to a railway curve mapping method based on satellite positioning. The railway curve mapping method based on the satellite positioning comprises the following steps that (1) a reference line is determined, specifically, a measuring starting point is determined, a datum point in a pre-set distance away from the measuring starting point on a railway is determined, and the connecting line of the measuring starting point and the datum point is taken as a reference line; (2) a first key mapping point is determined, specifically, the included angle of the connecting line of thecurrent position and the datum point and the reference line and the distance of the connecting line are calculated in real time, when the included angle and the distance of the connecting line of thecurrent position and the datum point reach the pre-set condition, the first key mapping point is reached according to prompts, mapping of the first key mapping point is completed, the mapping circuitdiagram is automatically refreshed, and the connecting line of the first key mapping point and the datum point is set to be a first reference connecting line; (3) a second key mapping point is found out to map; (4) the step (3) is repeated until a mapping destination is reached; and (5) the overall length of the railway curve is calculated. According to the railway curve mapping method based on satellite positioning, key mapping points can be automatically found out, the quantity of the measuring points in a controllable error is reduced, and the measuring precision is high.

Description

technical field [0001] The invention belongs to the technical field of railway surveying and mapping, and in particular relates to a method for surveying and mapping railway curves based on satellite positioning. Background technique [0002] In order to ensure the safe operation of the train, it is necessary to use satellite positioning technology to accurately survey and map the key positions and key sections of the railway. At present, RTK surveying instrument is a kind of more commonly used surveying and mapping equipment. However, when surveying and mapping railway curves, the method of spacing dots and broken line fitting is adopted. The existing RTK measuring instruments on the market need to manually judge and select the points to be measured, and cannot automatically find the key measurement points. The conference leads to an increase in error, and the small spacing will increase the number of surveying points, and the surveying and mapping are not efficient and in...

AI Technical Summary

Problems solved by technology

However, when surveying and mapping railway curves, the method of spacing dots and broken line fitting is adopted. The existing RTK measuring instruments on the market need to manually judge and select the points to be measured, and cannot automatically find the key measurement points. The conference leads to an increase in error, and the small spacing will increase the number of surveying points, and the surveying and mapping are not efficient and intelligent enough

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