Device and method for extracting steel rail impressed characters under working condition

Abstract

The invention relates to a device and a method for extracting steel rail impressed characters under a working condition. The device comprises a base, a guide mechanism and a carrier roller, the guidemechanism and the carrier roller are mounted on the base, a steel rail is supported and conveyed through the guide mechanism and the carrier roller, a support is further arranged on the base, and a line structure sensor is arranged on the support and perpendicularly right faces the surface of the rail web of the steel rail. The method comprises the following steps: acquiring steel rail surface point cloud data by using a linear structured light sensor; and fitting the point cloud data of the arc section where the steel rail impressing character is located through a least square circle fittingmethod based on radius constraint, screening out point cloud data corresponding to the steel rail impressing character, and converting the point cloud data into a two-dimensional image so as to extract a steel rail impressing character image. The method has a series of advantages of being simple in algorithm, good in extraction effect, high in reliability and the like, and can effectively solve the problem that steel rail impressed characters are difficult to extract under the working condition.

Description

technical field [0001] The invention relates to the technical field of rail detection, and more specifically, to a device and method for extracting rail embossed characters under working conditions. Background technique [0002] In the process of railway construction, steel rail is an important part of the railway, and its quality will directly affect the running speed, safety and comfort of the train. Since the embossed characters on the rail record important information such as the production time and location of the rail, it has become an important carrier for the production management, quality control and product tracking of the rail production base. [0003] Rail embossed characters are directly embossed by embossing molds, so the character area and the background area have the same color, and the characters are located on the rail waist arc section, not on the same plane, and the rail under working conditions is due to rust spots, corrosion, etc. Affected by factors, ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a rail embossed character extraction device and method under working conditions, which can effectively solve the problem that the character area of ​​the rail embossed character is the same color as the background area, the depth is shallow, and the character is located on the rail. Difficult extraction problem caused by the waist arc segment

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