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Method and device of vehicle-mounted high-speed dynamic railway surface defect video detection

A technology of video detection and speed detection, applied in the direction of optical testing flaws/defects, etc., to achieve real-time detection requirements, high-resolution scanning imaging, and small computational effort.

Inactive Publication Date: 2014-11-05
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

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  • Method and device of vehicle-mounted high-speed dynamic railway surface defect video detection

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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 a device of vehicle-mounted high-speed dynamic railway surface defect video detection. The method includes following steps: determining operation parameters of TDI line-scanning cameras according to a detection requirement; performing image calibration with the TDI line-scanning cameras; performing image registration to the images obtained by the two TDI line-scanning cameras; performing image interpolation calculation to the images after image registration and with spaces being staggered at a certain sub pixel displacement, thereby obtaining a pixel value of an interpolation point and finally obtaining a railway surface image with a space resolution being improved; performing classification and identification to railway surface defects, provides a caution of the railway surface defects and provides a fault point position according to a travelled distance of a train and GPS positioning information; and recording detection result data. The device includes two TDI line-scanning cameras, an industrial personal computer, a display, a train running status recording device set and a light source assembly. Compared with a method and a device in the prior art, the method and the device are quick in detection speed, are high in detection precision and can achieve real-time detection easily.

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 Applications(China)
IPC IPC(8): G01N21/88
Inventor 陈晓丽
Owner SHANGHAI UNIV OF ENG SCI
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