Steel rail contour positioning method and device

Abstract

The invention discloses a steel rail contour positioning method and a device. The method comprises the steps of acquiring multiple frames of laser stripe images of a steel rail; determining a spatialcontext model of the previous frame of laser stripe image according to the tracking area and the gauge point position data in the previous frame of laser stripe image; determining a space-time contextmodel of the next frame of laser stripe image according to the space context model of the previous frame of laser stripe image and the space-time context model of the previous frame of laser stripe image; and determining a tracking area in the latter frame of laser stripe image according to the space-time context model of the latter frame of laser stripe image and the gauge point position data inthe former frame of laser stripe image, and positioning the steel rail contour of the latter frame of laser stripe image. The change of the steel rail contour can be found timely and accurately, andtherefore it is guaranteed that the abraded steel rail is accurately positioned and maintained in time.

Description

technical field [0001] The invention relates to the technical field of high-speed railway infrastructure, in particular to a rail profile positioning method and device. Background technique [0002] Railway transportation is the main force of my country's transportation industry, and its development directly restricts the development of China's economy. With the rapid development of the railway industry and the increase in the running volume of high-speed and heavy-duty trains, the wear of the rails is also becoming more and more serious. Rail wear causes changes in rail profile dimensions, which deteriorates wheel-rail dynamics, increases the possibility of accidents during train operation, and reduces the service life of rails and locomotives. Therefore, it is necessary to track and locate the profile of the rail, and maintain and repair the worn rail in time when the profile of the rail changes. [0003] Under the high-speed train detection platform, the rail contour po...

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Problems solved by technology

[0008] Changes in ambient light will also affect the accuracy of rail contour positioning in the collected images, especially when the sunlight is at a certain angle to the rail surface, the rail surface will inevitably be introduced into environmental noise, resulting in the loss of tracking target shape

[0009] Based on the above, the existing rail profile positioning methods cannot take into account both accuracy and timeliness in the face of car body vibration, complex track structure, and ambient light changes, and cannot detect changes in rail profile in a timely and accurate manner, which is not conducive to accurate positioning Worn rails and timely maintenance and repairs

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