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Rail visual inspection two-dimensional and three-dimensional fusion imaging system

A three-dimensional imaging and two-dimensional imaging technology, which is applied in measuring devices, material analysis through optical means, instruments, etc., can solve problems such as difficult to effectively determine loose bolts and foreign objects in the ballast bed, and achieve the effect of reducing the overall size

Pending Publication Date: 2019-01-04
成都精工华耀科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to effectively determine defects such as loose bolts and foreign objects in the ballast bed on the two-dimensional texture image

Method used

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  • Rail visual inspection two-dimensional and three-dimensional fusion imaging system
  • Rail visual inspection two-dimensional and three-dimensional fusion imaging system
  • Rail visual inspection two-dimensional and three-dimensional fusion imaging system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] like figure 1 As shown in the figure, a two-dimensional and three-dimensional fusion imaging system for track visual inspection is composed of a two-dimensional and three-dimensional imaging module, an imaging control module, a data acquisition module 7, and a two-dimensional and three-dimensional data fusion module 8, wherein the two-dimensional and three-dimensional imaging The module is composed of n1 two-dimensional imaging devices 4 and n2 three-dimensional imaging devices 5, where n1=3 and n2=3. n1 sets of 2D imaging devices perform 2D imaging on the fastener system, rail system and ballast system of the track through field of view splicing, and obtain the texture image of the full section of the track. The three-dimensional imaging of the rail system, the rail system, and the track bed system is performed to obtain the three-dimensional topography data of the full section of the track. The positions of n1 two-dimensional imaging devices and n2 three-dimensional i...

Embodiment 2

[0041] The difference from Embodiment 1 is that the illumination light source in the two-dimensional imaging device 4 is a strip light source formed by k2 LED lamp beads collinear and serially arranged; the illumination light source illuminates the track surface obliquely downward, The area completely covers the imaging area of ​​the line array camera; the angle between the illumination direction of the light source and the imaging direction of the line array camera is a, a=60 degrees, and k2=10. The strip light source and the line scan camera constitute dark-field illumination imaging, which can weaken the strong reflected light on the top of the rail in Example 1, and explicitly image the defects on the top of the rail.

Embodiment 3

[0043] The difference from Embodiment 2 is that the illumination light source in the two-dimensional imaging device 4 and the central line structured light of the three-dimensional imaging device are both near-infrared light sources, and a narrow-band filter with a corresponding wavelength is set at the front end of the line array camera and the front end of the 3D camera to eliminate the Ambient light interference.

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Abstract

The invention discloses a rail visual inspection two-dimensional and three-dimensional fusion imaging system, which aims at the problems of low efficiency and high cost in the existing rail manual inspection and is used for acquiring rail surface two-dimensional image and three-dimensional morphology data and providing effective data for rail automatic inspection. The system consists of a two-dimensional and three-dimensional imaging module, an imaging control module, a data acquisition module and a two-dimensional and three-dimensional data fusion module, wherein the two-dimensional and three-dimensional imaging module consists of a plurality of two-dimensional imaging devices and three-dimensional imaging devices; imaging / measuring areas of the adjacent two-dimensional / three-dimensionalimaging devices are partially superposed and can perform full-coverage two-dimensional / three-dimensional imaging on a steel rail system, a fastener system and a ballast bed system; the imaging controlmodule is used for generating an imaging control system; the data acquisition module is used for acquiring two-dimensional / three-dimensional imaging data; and the two-dimensional and three-dimensional data fusion module is used for performing pixel alignment and fusion on the two-dimensional and three-dimensional imaging data. The imaging system can provide effective data for rail automatic inspection, improve the rail inspection efficiency and effectively guarantee the rail operation safety.

Description

technical field [0001] The invention relates to equipment in the field of railway infrastructure detection, in particular to a two-dimensional and three-dimensional fusion imaging system for track visual inspection. Background technique [0002] Railways are the main artery of national transportation and play a significant role in many fields such as national economy, national travel, and national defense transportation. The track is the infrastructure of railway transportation. The track is composed of a track bed system, a rail system, and a fastener system. During the long-term operation of the track, the rail system will have defects such as cracks and cracks, the fastener system will have defects such as bolt loosening, clip breakage, and clip fall off, and the track bed system will have defects such as cracks and fractures. In the subway, the track bed system also has problems such as foreign objects on the track bed (items missed by passengers: mobile phones, water b...

Claims

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Application Information

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IPC IPC(8): G01N21/88
CPCG01N21/8806G01N21/8851G01N2021/8822G01N2021/8887
Inventor 左丽玛其他发明人请求不公开姓名
Owner 成都精工华耀科技有限公司
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