Track detector track direction irregularity measuring method based improved chord measuring method

A technology of roughness and measurement method, which can be used in measurement devices, railway vehicle shape measuring instruments, instruments, etc., and can solve problems such as result influence

Active Publication Date: 2017-04-26
SHANGHAI NANJING INTERCITY RAILWAY CO LTD +1
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Problems solved by technology

The traditional method, such as the measurement algorithm of track irregularity by Jiangxi Riyueming Company, has the disadvantage that the err...

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  • Track detector track direction irregularity measuring method based improved chord measuring method
  • Track detector track direction irregularity measuring method based improved chord measuring method
  • Track detector track direction irregularity measuring method based improved chord measuring method

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[0037] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0038] figure 1Shown is the overall flowchart of the method for measuring the track irregularity of the track inspection instrument based on the improved chord measurement method of the present invention, and the main steps are as follows:

[0039] S1: Input a set of basic chord-rail direction data of the original track. The original track data is measured by the track inspection instrument on the actual line section, and the data is saved in a file ending with ".csv";

[0040] S2: Calculate the data through the improved chord measurement method, and obtain the orbital irregularity value of the...

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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...

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Application Information

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IPC IPC(8): G01B21/30B61K9/08
CPCB61K9/08G01B21/30
Inventor 张航吴永健周忠林林海昕
Owner SHANGHAI NANJING INTERCITY RAILWAY CO LTD
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