Method for measuring track direction and horizontal irregularity based on plot points

Abstract

The invention relates to a method for measuring track direction and horizontal irregularity based on plot points, belonging to the fields of rail transit, and railway conservation and maintenance. The method is characterized by comprising the steps of measuring data by mounting an inertia sensor trolley firstly; and then setting a reference coordinate system; calculating the coordinate of a measured point at the position of point zero; then calculating the coordinate of a measured point at the position of point one; then calculating the coordinates of measured points at positions in a measurement interval from the position of point two, thus the curve plot points of the integral measured rail is realized; and calculating the irregularity degree value according to the obtained plot points.The method has the beneficial effects that the rail direction and horizontal irregularity are obtained through setting a two-dimensional coordinate for the measured rail and carrying out geometric calculation, the cumulative errors of the calculation method for the rail direction and the horizontal irregularity degree by the existing measuring method are eliminated, the measurement accuracy is improved, the method has very good adaptability, and can be widely applied to rail irregularity detection devices which are measured by utilizing inertial elements.

Description

technical field [0001] The invention relates to a method for measuring track direction and level irregularity based on tracing points, and belongs to the fields of rail transportation and railway maintenance and repair. Background technique [0002] The track is the bearing surface for locomotives, passenger / freight carriages and other large-scale rail vehicles to run, and is composed of subgrades, sleepers, rails, fasteners and other components. The ideal track should be smooth, but due to the initial bending, wear, damage of the rail, uneven sleeper spacing, uneven quality, etc., and the gradation and strength unevenness, looseness, dirt, and hardening of the ballast bed, The combination of factors such as uneven subgrade subsidence and stiffness changes lead to random characteristics of the smoothness of the track. When the degree of track irregularity (referred to as irregularity) exceeds a certain range, it will cause the rail transit vehicles running on it to bump and...

AI Technical Summary

Problems solved by technology

[0004] Limited by the sensitive parameters of the components, the track inspection instrument designed according to the inertial component measurement method cannot directly measure the derailment direction and level at present, so the measurement data must be calculated to obtain the result value

When calculating the track direction and level, the current algorithm adopts the method of using the small to push the large (use the small chord length roughness to calculate the large chord length roughness), and the mileage instead of the chord length (use the mileage output to replace the actual drawn string length). Large cumulative error, and the error increases with the increase of the length of the measurement track, which affects the accuracy of the relative measurement method and needs to be improved

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