Method for detecting geometric states of tracks on basis of combined measurement

Abstract

The invention discloses a track geometric state detection method based on combined measurement, which comprises the following steps: setting stations at regular intervals on a complete detection line; The coordinates of the center point of the prism on the track inspection trolley in the absolute coordinate system when it is at the position of each station, according to the installation position of the center point of the prism on the track inspection trolley, the coordinates of the center point of the prism in the coordinate system of the track inspection trolley when it is at each station position ; Obtain the coordinates of the track points in the absolute coordinate system according to the azimuth, horizontal inclination, and high and low inclination angles of the track inspection trolley at each station; when performing relative measurements between stations, use the track inspection trolley to sample at equal intervals to obtain the geometric state of the track Relative information, the planar coordinates and elevations of all inter-site tracks are calculated. The invention combines the advantages of relative measurement and absolute measurement, and can realize rapid and high-precision measurement of track plane coordinates and elevation.

Description

technical field [0001] The invention relates to a track detection method, in particular to a track geometric state detection method based on combined measurement. Background technique [0002] The development and maturity of railway construction technology, especially the development and maturity of high-speed rail technology, makes convenient and fast rail travel the choice of people. However, with the acceleration of train running speed, the increase of railway operation volume and the occurrence of subgrade settlement, the change of track geometry poses a threat to the safety of train driving. In order to ensure the safety of trains and provide passengers with a stable and comfortable riding environment, the railway department must strictly inspect the state of the track. [0003] At present, the detection methods of track geometry state include relative measurement and absolute measurement. Relative measurement usually uses a track geometric state inspection instrument...

AI Technical Summary

Problems solved by technology

Relative measurement usually uses a track geometric state inspection instrument (referred to as a track inspection trolley) to measure the internal geometric state parameters of the track. The measurement speed is fast but the accuracy is low and the absolute coordinates of the track cannot be obtained; the absolute measurement usually uses a total station to measure the absolute coordinates of the track. The measurement accuracy is high but the speed is slow, which cannot meet the detection needs of my country's long railway lines

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