Photogrammetric method for track alignment detection of railway track

Abstract

The invention discloses a photogrammetric method for track alignment detection of a railway track. When a track detection trolley is moved forwards, a track surface camera collects a single track picture existed with fixed geological distortion at a certain distance, and performs geological correction, matching and assembling on the picture, thus a two-dimensional long track picture is obtained; the edge detection is performed on the long track picture, thus an inner edge of the long track is preliminarily obtained. A linear structural light source emits a laser plane from the longitudinal axis direction of a vertical steel rail, and the laser plane forms a light curve capable of reflecting the outline characteristics of the steel rail on the steel rail surface; the track side camera takes a picture of the optical curve at a certain distance. The picture obtained by the track side camera is performed with light bar thinning, steel rail outline restoration and outline matching of the steel rail; a fat edge value of the steel rail outline is calculated, the inner edge of the long track at corresponding position is compensated according to the calculated fat edge value, thus the inner edge of the long track at 16 mm downwards the track surface is obtained. According to the inner edge of the long track, the two-dimensional coordinate is set up, thereby obtaining the coordinate of every point on the edge; namely, the track direction with any chord length at every place of the railway track can be calculated.

Description

technical field [0001] The invention relates to a photogrammetry method for rail direction detection of railway tracks. Background technique [0002] With the rapid development of my country's railway transportation, ordinary railway speed-up and high-speed railway construction have become important means to improve railway transportation capacity. Among them, high-speed railway has become an important part of my country's transportation with its advantages of fast and comfortable, large carrying capacity, low-carbon and environmental protection. The improvement of train running speed puts forward stricter requirements on track smoothness. During the long-term operation of high-speed trains, due to the repeated action of wheels and rails and the influence of many factors such as settlement, the railway track is prone to geometric deformation. If the track smoothness is not up to standard, it will damage the track and rolling stock components, and reduce the service life of ...

AI Technical Summary

Problems solved by technology

However, it needs to be further improved in terms of distribution density of detection points and measurement efficiency.

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