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Rail wheel tread scratch detection method

A detection method and technology of train wheels, applied in the detection field, can solve the problems of high false alarm rate, inability to clearly distinguish defects and dirt on tread surfaces, etc., and achieve the effect of avoiding detection false alarms and ensuring accuracy

Inactive Publication Date: 2017-09-12
DONGGUAN NANNAR ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Defect detection: Image detection of tread defects often cannot clearly distinguish defects from tread dirt, and the false alarm rate is extremely high

Method used

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  • Rail wheel tread scratch detection method
  • Rail wheel tread scratch detection method
  • Rail wheel tread scratch detection method

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Embodiment Construction

[0018] In order to make the purpose, technical solution and advantages of the invention clearer, the invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] Such as Figure 1 to Figure 3 As shown, the present invention provides a method for detecting a train wheel tread scuff, which is used to detect train wheel tread defects and distinguish tread defects and tread dirt. The train wheel tread scuff detection method includes the following steps:

[0020] Step (1), image acquisition, provides an imaging device, the imaging device includes several imaging modules 100, each imaging module 100 includes two industrial cameras 10, two multi-line lasers 20 and a wheel alignment sensor 30, two The industrial cameras 10 are arranged on both sides of the wheel alignment sensor 30, and the two industrial cameras 10 are used in conjunction with the wheel alignment sensor 30. The wheel alignment sensor 30 can simultaneously...

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Abstract

The invention relates to a rail wheel tread scratch detection method. The method comprises the following steps of 1 image acquisition, wherein an imaging device is provided, the imaging device comprises multiple imaging modules, each imaging module comprises two industrial cameras, two multi-line lasers and a wheel positioning sensor; 2, image feature extraction, wherein image features are extracted according to the feature variation of each laser ray in pictures shot by the industrial cameras, and a feature curve is formed; 3, qualitative analysis of tread scratch. Accordingly, by arranging devices such as the multi-line lasers, the wheel positioning sensor and an analysis computer, tread scratch detection is conducted on wheels, the wheels do not need to be subjected to precise positioning, and the entire tread circumference of each wheel can be detected; the influence of external environment light on the detected structure is small, and the precision of detection can be guaranteed; by adopting the structure light of the multi-line lasers, the depth information of tread defects can be detected, by means of the depth information, tread dirt and scratch can be distinguished clearly, and therefore detection misinformation can be avoided.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method for detecting abrasions on train wheel treads. Background technique [0002] The wheel set is one of the most important parts of the train. The quality of the wheel set directly affects the safety of the train. Defects on the tread surface of the train wheel set include tread abrasion and tread peeling. These defects will bring additional shock and vibration during the operation of the train. , Seriously affect the running safety of trains and the service life of track facilities, so how to accurately detect the defects of train wheel treads is a detection technology problem that needs to be solved urgently in the development of trains. [0003] At present, most of the measurement schemes used in the industry are contact detection, and image analysis can only be used to assist (human) judgment. When the train passes through the inspection equipment, each wheel is photogra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61K9/12G01N21/88
CPCB61K9/12G01N21/8851G01N2021/8887
Inventor 谭志忠赵晓华刘刚廖益权
Owner DONGGUAN NANNAR ELECTRONICS TECH
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