Image detection method for scratches of wheel tread
An image detection and wheel tread technology, applied in the detection field, can solve the problems of heavy manual inspection workload, prone to missed detection, low labor efficiency, etc., and achieve the effects of improved detection reliability, prominent scratches, and uniform lighting
Active Publication Date: 2016-02-03
DONGGUAN NANNAR ELECTRONICS TECH +1
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Problems solved by technology
[0003] The scratch detection of railway wheelsets in my country is mainly divided into two parts: static detection and dynamic detection. When static detection is used, the operating conditions are poor, the labor intensity is high, and the labor efficiency is low.
Moreover, planned maintenance is implemented for vehicle maintenance, and it is difficult to detect the changes in wheel parameters and sudden failures such as scratches of running vehicles in time, and the workload of manual inspection is heavy, which is prone to missed inspections
[0004] The dynamic detection method can make up for the lack of static detection to a certain extent and reduce the workload of detection. At present, the tread image detection in the industry mostly uses point light sources, and there are local strong reflection points on the mirror-like tread surface, resulting in uneven brightness and darkness of the image. Scratches are not easy to analyze and find out, and the reliability is not high, so that there are potential safety hazards during the running of the train
In addition, the use of point light source detection also has the problem of specular reflection, which affects the imaging effect during detection, thus indirectly affecting the effectiveness of detection results
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[0020] In order to make the technical solution of the present invention more clearly expressed, the present invention will be further described below in conjunction with the accompanying drawings.
[0021] see figure 1 and figure 2 , the present invention provides a method for detecting a wheel tread scratch image, which is used to detect whether there is damage to a wheel of a train to ensure driving safety. The wheel tread scratch image detection method includes the following steps:
[0022] Step (1): Image acquisition, providing an imaging module, the imaging module includes a positioning sensor group 40, two tread detection camera groups 20, two light source devices 30, and the two light source devices 30 are arranged on the outside of the second rail 10 , the two tread detection camera groups 20 are respectively arranged on the inside of the second rail 10, the two tread detection camera groups 20 are aligned parallel to each other, and each tread detection camera group...
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The invention discloses an image detection method for scratches of a wheel tread. The image detection method comprises the following steps of firstly, acquiring an image; secondly, judging an interested area; thirdly, performing binarization processing to form a distribution diagram effect with a grey value being 0 or 255, and obtaining a binary image; fourthly, judging in real time. The image detection method disclosed by the invention has beneficial effects that a complete tread is shot by multiple cameras, so that the problem that uniform photos shot from a large curved surface are not easy to obtain is solved; in addition, an effective CCD (Charge Coupled Device) target surface of each camera is fully utilized, and a 10*10mm scratch or smaller scratches can be detected; besides, by adopting an LED (Light Emitting Diode) surface light source technology and a projection technology, the tread with a mirror surface effect is completely polished for highlighting the scratches; the illumination is uniform, so that the scratches are highlighted, the problems that the mirror surface of the tread reflects light and a surface image is non-uniform in brightness are solved, and the detection reliability is greatly improved.
Description
technical field [0001] The invention relates to a detection method, in particular to an image detection method of wheel tread scratches. Background technique [0002] During the operation of the train, the wheel treads are often partially scratched due to braking or idling and slipping. After the scratches, the wheels will cause coupling vibration of the entire vehicle track system during the running of the train, endangering driving safety. Therefore, it is very important and necessary to detect and identify wheel tread abrasions in real time. [0003] The scratch detection of railway wheelsets in my country is mainly divided into two parts: static detection and dynamic detection. When static detection is used, the operating conditions are poor, the labor intensity is high, and the labor efficiency is low. Moreover, planned maintenance is implemented for vehicle maintenance, and it is not easy to find out the wheel parameter changes and sudden failures such as scratches of...
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IPC IPC(8): G01N21/956G01N21/01
Inventor赵晓华辜勇彬张天桥陈齐谭志忠郭铭峰
OwnerDONGGUAN NANNAR ELECTRONICS TECH