On-line detection method and device for thread defect of vehicle wheel set

A detection method and technology of detection device, which are applied in the direction of measurement device, rim measurement/measurement, radio wave measurement system, etc., can solve the problems of automatic defect detection method, difficulty in long-term tracking and recording of train wheel tread parameters, etc. maintenance effect

Inactive Publication Date: 2007-07-18
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Due to the lack of more accurate, fast and economical automatic detection methods for wheel tread defects, it is difficult to track and record the tread parameters of train wheels for a long time

Method used

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  • On-line detection method and device for thread defect of vehicle wheel set
  • On-line detection method and device for thread defect of vehicle wheel set
  • On-line detection method and device for thread defect of vehicle wheel set

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Embodiment Construction

[0030] Before the tread defect detection system, the size profile parameters of the wheel set tread must be detected online in advance by another detection device, and the size parameters of each wheel set tread are used as known conditions for defect detection.

[0031] The wheel tread is the contact part between the left and right wheels and the rail. Tread defects include two parameters of tread scuffing and tread peeling, which are measured by scratch depth and peeling length along the rolling circle direction of the wheel respectively.

[0032] Figure 1 is a schematic diagram of the overall configuration of the detection device. Two speed measuring position sensors 1 and 2 are arranged in sequence along one side of the track close to the position of the track, and one trigger position sensor 4 . The structured light source 5 and the line array cameras 6, 7 and 8 form a set of image acquisition devices, which are distributed on the outside of the straight track 9 . The s...

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Abstract

The present invention discloses a method for online detecting railway car wheel set tread defect and its on-line detecting equipment. It is characterized by that the light sent out by light source of structure light can be irradiated on the wheel set tread, on the tread a projection image is formed. When the wheel set is run to the set position, the third position sensor can give out a triggering signal to start image sensor to shoot a series of tread projection images. By utilizing analysis and calculation a deviation image of actual shot image and defectless image can be obtained, it can further judge that in the deviation image the defect is existed or not, and can calculate tread defect parameter.

Description

technical field [0001] The invention relates to a detection method and detection device, in particular to an online detection method and detection device for vehicle wheel tread defects in the rail transit sector, and in particular to using a structured light source to irradiate the vehicle wheel tread in low-speed operation to obtain image data , and analyze the image data in real time to obtain the detection method and device for tread defect parameters. Background technique [0002] Vehicle wheel set tread defects include tread galling and tread peeling. Defects bring additional shock and vibration to the train during operation, which affects the safety and service life of the train and track facilities. It is a measurement technical problem that needs to be solved urgently in the development of high-speed trains and heavy-duty trains. Wheel dropouts due to tread scuffing and peeling account for a large percentage of the total number of dropouts per year. The detection ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61K9/12G01C11/36G01N21/00
Inventor 吴开华严匡蒋鹏
Owner HANGZHOU DIANZI UNIV
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