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Multi-polarized light point cloud data fusion method and device for appearance state of steel rail

A fusion method and technology of point cloud data, applied in image data processing, instrumentation, computing, etc., can solve the problem of insufficient exposure of laser cross-section images, and achieve the effect of improving the contrast of the light bar and the confidence of the center of the light bar

Pending Publication Date: 2022-03-25
CHINA ACADEMY OF RAILWAY SCI CORP LTD +2
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Problems solved by technology

[0009] An embodiment of the present invention provides a multi-polarized light point cloud data fusion method for rail appearance status, which is used to solve the problem of insufficient local exposure of laser cross-sectional images faced by rail profile measurement of non-polarized structured light projection. The method includes:

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  • Multi-polarized light point cloud data fusion method and device for appearance state of steel rail
  • Multi-polarized light point cloud data fusion method and device for appearance state of steel rail
  • Multi-polarized light point cloud data fusion method and device for appearance state of steel rail

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[0064] Choose the Genie Nano M2450 Polarized model polarization camera, which is produced by TeledyneDalsa, Canada, and has good polarization imaging performance. Integrate the camera into the rail profile detection system and follow the Figure 1-Figure 4 The shown process obtains the polarization fusion point cloud data of the orbital profile, which can be obtained as Figure 5 The four-way polarization component image and the Stokes parameter image S of the laser section of the rail shown 0 , S 1 , S 2 , linear polarization angle image I AoP and linear polarization image I DoLP . in, Figure 5 Among them, (a) represents the polarization component image in the 0° direction; (b) represents the polarization component image in the 135° direction; (c) represents the polarization component image in the 45° direction; (d) the polarization component image in the 90° direction; (e) represents the Stokes parametric image S 0 ; (f) represents the Stokes parameter image S 1 ; ...

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Abstract

The invention discloses a multi-polarized light point cloud data fusion method and device for a steel rail appearance state. The method comprises the following steps: merging read polarization camera data into steel rail profile data; dividing the steel rail profile data into a plurality of areas according to the rail vertex coordinates and the rail gauge point coordinates; fitting the steel rail profile data of the plurality of areas by using a random sampling consensus RANSAC algorithm to obtain fitting curves of the plurality of areas; performing curve fusion on the fitting curves of the plurality of areas to obtain an optimal steel rail profile fitting curve; and carrying out steel rail profile measurement by utilizing the optimal steel rail profile fitting curve. The method effectively solves the problem of local underexposure of the laser section of the steel rail.

Description

technical field [0001] The invention relates to the technical field of structured light imaging, in particular to a multi-polarized light point cloud data fusion method and device for rail appearance states. Background technique [0002] This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] Online measurement of rail appearance status, timely understanding of rail health status, analysis of rail profile and wear trend, and detection of scratch defects on the top surface of rail are important means for railway operation and maintenance. Rail profile measurement refers to comparing the measured rail profile data with the standard profile data of the rail to obtain indicators such as side grinding, vertical grinding, angle grinding, and total wear of the rail, and provide a data basis for the detection of rail sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/10G06T7/143
CPCG06T7/0004G06T7/10G06T7/143G06T2207/20221G06T2207/30136
Inventor 王胜春王乐韩强方玥王昊王宁王凡李海浪任盛伟戴鹏
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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