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Method for detecting abnormal conditions of rails and fasteners through double-spectrum imaging

An anomaly detection and dual-spectrum technology, applied to railway car body components, optical testing flaws/defects, railway vehicle shape measuring devices, etc., can solve problems such as loose rails and fasteners

Pending Publication Date: 2018-01-12
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

[0004] In order to solve the above-mentioned problems existing in the existing methods for detecting loose rails and fasteners, the present invention provides a dual-spectral imaging method for abnormal detection of rails and fasteners

Method used

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  • Method for detecting abnormal conditions of rails and fasteners through double-spectrum imaging
  • Method for detecting abnormal conditions of rails and fasteners through double-spectrum imaging
  • Method for detecting abnormal conditions of rails and fasteners through double-spectrum imaging

Examples

Experimental program
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Effect test

Embodiment 1

[0074] Such as figure 2As shown, a visible light area array camera 3 and an infrared area array camera 4 are used to form a dual-spectrum area array imaging device 11, wherein the optical axis of the visible light area array camera 3 and the infrared area array camera 4 are perpendicular to each other. A dichroic mirror 5 is arranged on the optical axis of the camera, and the light splitting surface of the dichroic mirror 5 forms an angle of 45 degrees with the optical axes of the visible light array camera 3 and the infrared array camera 4; Visible, near-infrared and mid-to-far infrared mixed light 6 is separated into visible light and near-infrared mixed light 7 and mid-to-far infrared light 8, which respectively enter the visible light area array camera 3 and infrared camera 4 to obtain dual-spectrum images; adjust the visible light area array camera 3 , the distance and the angle from the infrared area array camera 4 to the dichroic mirror 5 splitting surfaces, so that th...

Embodiment 2

[0076] The difference from Embodiment 1 is that an illumination light source is provided beside the dual-spectrum area array imaging device 11, and the light source is projected onto the rail 1 and fastener 2 areas, and the wavelength of the light source is 800nm, such as image 3 As shown, an 800nm ​​narrow-band filter 9 is set at the front end of the visible light camera to eliminate ambient light interference and obtain surface texture images of rails and fasteners with consistent brightness.

Embodiment 3

[0078] The difference from Example 2 is that, as Figure 4 As shown, three parallel light surface light sources 10 are arranged next to the dual-spectrum area array imaging device 11, of which two parallel light surface light sources 10-1 and 10-2 are located directly above the area of ​​the fastener 2 on both sides of the rail, and one parallel light source The surface light source 10-3 is obliquely incident on the rail 1, the angle between the incident direction and the longitudinal direction of the rail 1 is 20 degrees, and the irradiation areas of the three light sources do not overlap.

[0079] Such as Figure 5 As shown, when the parallel surface light source 10-3 is obliquely incident on the rail 1, a dark field lighting system is formed between the visible light area array camera 3; After the parallel light reaches the surface of the rail, most of the light energy is emitted in the form of mirror reflection, and cannot enter the visible light area array camera 3, so t...

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Abstract

The invention discloses a method for detecting abnormal conditions of rails and fasteners through double-spectrum imaging, which belongs to the technical field of rail transport safety detection, andis used for solving the problem of difficulty in detecting the abnormal conditions of rails and fasteners in the prior art. According to the method, a visible light camera and an infrared camera forma double-spectrum imaging device for performing double-spectrum imaging on the rail and fastener areas and respectively acquiring the texture images and infrared thermal images of the rails and the fasteners; the texture images are adopted for positioning the rails and fasteners in the infrared thermal images; the background model comparison is adopted for detecting the abnormal conditions of missing, loosening and breaking of the fasteners; the texture images and the infrared thermal images are jointly used for detecting the rail peeling, scratching, corrugation and cracks. According to the method disclosed by the invention, the abnormal detection efficiency for the rails and the fasteners is effectively promoted and the rail transit safety is guaranteed.

Description

technical field [0001] The invention relates to the technical field of rail traffic safety detection, in particular to a dual-spectrum imaging rail and fastener anomaly detection method. Background technique [0002] In terms of railway infrastructure testing, my country has long been dominated by manual and static testing, with high maintenance costs, high strength, and poor safety. In recent years, my country's high-speed railways have developed rapidly, and higher requirements have been put forward for the automation and real-time performance of railway testing. The existing rail and fastener detection technologies at home and abroad are: continuous scanning device based on linear array laser, such as German Sick company; computer vision detection device based on area array image sensor, such as VIS system of American ENSCO company, developed by German Atlas Electronic company The photoelectric track detection system and the high-speed vehicle-mounted track image recognit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88B61K9/08
Inventor 不公告发明人
Owner 成都精工华耀科技有限公司
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