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Method and device for diagnosing poor welded joints of heavy-duty railway rails

A welding joint, bad technology, applied in the field of diagnosing bad welding joints of heavy-duty railway rails, can solve problems such as low efficiency and precision

Active Publication Date: 2022-08-09
CHINA ACADEMY OF RAILWAY SCI CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing methods for diagnosing poor welded joints of heavy-duty railway rails are both inefficient and inaccurate

Method used

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  • Method and device for diagnosing poor welded joints of heavy-duty railway rails
  • Method and device for diagnosing poor welded joints of heavy-duty railway rails
  • Method and device for diagnosing poor welded joints of heavy-duty railway rails

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Embodiment Construction

[0040] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention more clearly understood, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but not to limit the present invention.

[0041] In the prior art, although research work has been carried out on the use of axlebox acceleration to diagnose the random damage of the rail surface, the inventors have not found any relevant information on how to use the axlebox acceleration combined with time-frequency analysis to diagnose poor welded joints of heavy-duty railway rails. Literature reports and descriptions.

[0042] Considering the problems existing in the prior art, the inventor proposes a scheme for diagnosing bad welded joints of heavy-duty railway rails. The scheme starts f...

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Abstract

The invention discloses a method and a device for diagnosing bad welded joints of heavy-duty railway rails, wherein the method comprises: performing CEEMD-ASSTFT on the axle box acceleration waveform data of the heavy-duty railway rail to be diagnosed to obtain time-frequency distribution; The moving effective margin spectrum of the time-frequency distribution; according to the moving effective margin spectrum, the weld margin index is calculated; according to the weld margin index, it is determined whether there is a problem of poor welded joints in the to-be-diagnosed section. The invention can efficiently and accurately diagnose the problem of poor welded joints of heavy-duty railway rails by utilizing the acceleration of the axle box combined with the time-frequency distribution, thereby ensuring the safe and stable operation of the vehicle.

Description

technical field [0001] The invention relates to the technical field of rail detection, in particular to a method and a device for diagnosing poor welded joints of heavy-duty railway rails. Background technique [0002] This section is intended to provide a background or context to the embodiments of the invention recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] Most of the heavy-duty railway rails are laid with seamless rails. When welding rails, three welding methods are mainly used: flash welding, gas pressure welding and aluminothermic welding. In the actual welding process, due to the rail base material, materials, welding process and operation quality, it is easy to produce uneven welding quality, resulting in poor joint smoothness. [0004] When the train passes through the bad joint, the contact area between the wheel and the rail becomes smaller, and the pressure on the rail becomes larger, resu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B61K9/08G01M13/00
CPCB61K9/08G01M13/00
Inventor 肖炳环刘金朝徐晓迪牛留斌毛学耕
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD