A method for measuring track irregularity of track inspection instrument based on improved chord measurement method

Abstract

The invention discloses a track detector track direction irregularity measuring method based on an improved chord measuring method. The method includes the following steps: first, n track basic chord track direction measured values corresponding to mileage are input, and the corresponding chord is recorded as (A<i-2>, Ai); a straight line where the chord (A<i-2>, Ai) is serves as an X axis, A0 serves as an original point, and an axis which is vertical to the X axis and downward serves as a Y axis, a rectangular coordinate system is built; then, an included angle theta(i) between a line segment (A<i-2>, Ai) and the X axis is calculated; then coordinate values of A0, A1,..., An are calculated, and an equation of a straight line where the line segment (A0, An) is is calculated; and finally, distance from the Point A<n / 2> to the abovementioned straight line is determined, i.e., the track M-meter chord track direction irregularity. The track detector track direction irregularity measuring method based on the improved chord measuring method is not easy to accumulate a bigger error due to a small error obtained by measurement, and calculation of a track direction value on a non-circular curve track can also obtain a relatively ideal result.

Description

technical field [0001] The invention relates to the field of detection of railway public works lines, in particular to a method for measuring the irregularity value of the track direction based on the improved chord measurement method. Background technique [0002] Under the unstable load of rolling stock, the track will produce vertical and transverse dynamic elastic deformation and residual cumulative deformation, which is called track irregularity. Track irregularities can generally be divided into long-wave irregularities such as gauge, level (triangular pit), height, rail direction, composite irregularity and continuous irregularity, and short-wave irregularities such as rail corrugation, joint disease, rail abrasion and peeling . Among them, the irregularity of the rail direction means that the straight line is not straight and the curve is not round. It is usually caused by hard bending of the rail, loose fasteners, and poor slope of the relaxation curve. Serious irr...

AI Technical Summary

Problems solved by technology

The traditional method, such as the measurement algorithm of track irregularity by Jiangxi Riyueming Company, has the disadvantage that the error of the algorithm will have a process of transmission and accumulation, and a small error will also have a great impact on the final result. Impact

Images