Vehicle wheel tread abrasion visual-detection method combined with depth measurement

A technology for wheel tread and depth measurement, which is used in measurement devices, optical testing of flaws/defects, image data processing, etc., can solve the problem of inability to obtain tread images at the same time, and achieve the effects of fast measurement speed, simple implementation, and time and cost savings.

Inactive Publication Date: 2018-05-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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This method is designed to obtain the wheel dimensions,

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  • Vehicle wheel tread abrasion visual-detection method combined with depth measurement
  • Vehicle wheel tread abrasion visual-detection method combined with depth measurement
  • Vehicle wheel tread abrasion visual-detection method combined with depth measurement

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[0041] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0042] This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.

[0043] The invention discloses a method for visual detection of wheel tread scratches combined with depth measurement, which comprises the following steps:

[0044] Step 1), after projecting the preset grating out of the structured light field and projecting it onto the surface of the standard wheel in a center-divergent manner, extract the tread image of the standard wheel to obtain the tread image of the standard wheel, and use it as a reference plane; The preset grating has a phase...

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Abstract

The invention discloses a vehicle wheel tread abrasion visual-detection method combined with depth measurement. The method includes the following steps: carrying out tread image extraction on a standard vehicle wheel to extract standard phase information from an image; carrying out tread image extraction on a to-be-measured vehicle wheel to extract to-be-measured phase information from an image; carrying out subtraction on a to-be-measured phase and a standard phase to obtain a phase difference between any point on a to-be-measured vehicle wheel tread and a reference plane, and acquiring treaddepth information of the to-be-measured vehicle wheel; removing grating portions in the tread image of the to-be-measured vehicle wheel, and acquiring tread image information of the to-be-measured vehicle wheel; and adopting image fusion technology to fuse the above-mentioned acquired tread depth and image information of the to-be-measured vehicle wheel for display. Through the above-mentioned manner, the method can realize effects of quickly acquiring all images of an entire circle of the tread and depth information corresponding to each point on the images, and thus more accurately understanding a damage situation of the vehicle wheel tread.

Description

technical field [0001] The invention relates to the field of wheel tread damage detection, in particular to a visual detection method for wheel tread scratches combined with depth measurement. Background technique [0002] As an important part of high-speed train operation, wheels are related to the safety and quality of train operation. Under the action of the high load pressure of the carriage and the impact force generated by the contact with the track, the wheel tread becomes a high-incidence area for various injuries. It is very necessary to detect wheel tread abrasions in order to repair and replace damaged wheels and eliminate potential safety hazards. [0003] There are six commonly used methods for wheel tread damage detection at home and abroad, namely optical detection method, vibration acceleration detection method, ultrasonic surface wave detection method, photoelectric method, displacement detection method and image detection method. These methods are all effe...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/11G06T7/50G06T5/50G06T5/00G01N21/88
CPCG01N21/8851G01N2021/8887G06T5/002G06T5/50G06T7/0002G06T2207/20056G06T2207/30168G06T7/11G06T7/50
Inventor 李始燕田裕鹏钱时锦郑帆军
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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