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Dynamic measurement method of rail corrugation

A technology of dynamic measurement and corrugation, applied in the direction of measuring devices, railway vehicle shape measuring devices, railway car body parts, etc., can solve the problem that it is difficult to ensure that the measurement point is always within the effective range of the rail top

Active Publication Date: 2018-12-18
HUNAN UNIV
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Problems solved by technology

Compared with the inertial reference method, its measurement value is not affected by the running speed of the car body, but due to the random vibration of multiple degrees of freedom that may occur during the traveling process of the car body, it is difficult to ensure that the measurement point is always within the effective range of the rail top

Method used

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  • Dynamic measurement method of rail corrugation
  • Dynamic measurement method of rail corrugation
  • Dynamic measurement method of rail corrugation

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Embodiment Construction

[0037] The dynamic detection system is composed of a multi-line profile acquisition platform composed of multiple line lasers and area array cameras, a data processing platform composed of a comprehensive processing computer and an odometer, and a result output platform composed of a printer and a display. The system block diagram is shown in figure 1 shown.

[0038] During operation, the structured light plane projected by the line laser intersects the rail, forming multiple laser light bar curves containing rail profile information on the rail surface. At the same time, the rotation of the train axle drives the photoelectric encoder to rotate and output the trigger signal, which drives the area array cameras on both sides to complete the synchronous acquisition of light stripe images at equal intervals. After the image is transmitted to the computer through the switchboard, the center line of the light bar is extracted, the image coordinate system is converted to the camera ...

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Abstract

The invention discloses a dynamic measurement method of rail corrugation, which comprises the following steps: (1) constructing an auxiliary plane perpendicular to the rail longitudinal direction by utilizing the characteristics that the connecting lines of the rail jaw points of a plurality of measurement profiles are parallel to the rail longitudinal direction, and projecting the measurement profiles onto the auxiliary plane for distortion calibration. (2) Progressively and accurately align the reference contour with the stratified contour registration. (3) Using the characteristic that thedistance between the center of the circular arc of the rail waist and the measuring point of the wave grinding is fixed in the direction of the track gauge, the measuring point is precisely positioned, and the distance in the vertical direction of the two points is taken as the wave grinding value of the section. This method can effectively solve the problem of low precision of the dynamic detection method of rail corrugation.

Description

technical field [0001] The invention relates to the field of rail measurement, in particular to a dynamic measurement method for rail corrugation. Background technique [0002] After the rail is put into use, the irregular uneven phenomenon along the longitudinal direction on the track tread is called rail corrugation wear, or rail corrugation for short. Rail corrugation is one of the main reasons for howling and wheel-rail contact resonance in the natural frequency range during train operation, which aggravates the damage of track structural components and endangers driving safety. Therefore, the high-precision rail corrugation dynamic detection technology is an important guarantee for the safety of railway transportation. [0003] At present, there are three main measurement methods for rail corrugation: manual caliper method, inertial reference method and string measurement method. The artificial caliper method uses a vernier caliper in contact with the track surface to...

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Application Information

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IPC IPC(8): B61K9/08G01B11/30
CPCB61K9/08G01B11/303
Inventor 马子骥刘微董艳茹刘宏立黄佩
Owner HUNAN UNIV
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