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A video detection method and device for vehicle-mounted high-speed dynamic track surface defects

A technology of video detection and detection device, which is applied in the direction of optical testing flaws/defects, etc., to achieve the requirements of easy real-time detection, improve speed and accuracy, and high-resolution scanning imaging.

Inactive Publication Date: 2016-08-24
SHANGHAI UNIV OF ENG SCI
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Problems solved by technology

[0004] The main problem faced by video-based orbit detection is: how to acquire high-resolution images of the orbit while moving at high speed, only high-resolution image acquisition can guarantee the detection accuracy

Method used

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  • A video detection method and device for vehicle-mounted high-speed dynamic track surface defects
  • A video detection method and device for vehicle-mounted high-speed dynamic track surface defects
  • A video detection method and device for vehicle-mounted high-speed dynamic track surface defects

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Embodiment Construction

[0047] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0048] Such as figure 1 As shown, a vehicle-mounted high-speed dynamic track surface defect video detection method includes the following steps:

[0049] 1) Determine the operating parameters of the TDI line scan camera according to the detection requirements, including the camera scanning line frequency, the installation and fixing method of the camera, and the spatial parameter relationship between the cameras.

[0050] 2) The train speed detection equipment detects the speed and acceleration of the train in real time and transmits it to the TDI line scan camera to ensure the sync...

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Abstract

The invention relates to a method and device for video detection of vehicle-mounted high-speed dynamic rail surface defects. The method includes: determining the operating parameters of a TDI line scan camera according to the detection requirements; performing image calibration on the TDI line scan camera; Image registration of the image; image interpolation calculation is performed on the registered image with a certain sub-pixel displacement in space, so as to obtain the pixel value of the interpolation point, and finally obtain the orbital surface image with improved spatial resolution; Classify and identify surface defects; give warnings for track surface defects, and give fault point locations combined with train mileage and GPS positioning information; record test result data; the device includes a TDI line scan camera, an industrial computer, a display, and a train running Status records for device groups and light source components. Compared with the prior art, the invention has the advantages of fast detection speed, high detection precision, easy realization of real-time detection and the like.

Description

technical field [0001] The invention relates to a method and device for detecting surface defects of a rail, in particular to a method and device for video detection of surface defects of a vehicle-mounted high-speed dynamic rail. Background technique [0002] In rail transit, track surface defects, such as broken fasteners, track surface scratches, falling blocks, cracks, etc., will cause great damage to wheel sets and bearings. Wheels moving on tracks with surface defects will not only shorten the train The service life of each component is also an important reason for vehicle overturning, burning axles, and axle cutting. Therefore, it is particularly important to regularly detect the track status. In our country, at present, ordinary railway inspections are still dominated by manual inspections. However, with the rapid development of electrified railways, train speeds increase and heavy loads, the surrounding environment of railways in many places is harsh, and manual met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/88
Inventor 陈晓丽
Owner SHANGHAI UNIV OF ENG SCI
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