A Method for Measuring the External Dimensions of Wheels
A technology of external dimensions and measurement methods, which is applied in the direction of measuring devices, instruments, and optical devices, can solve problems such as system errors, and achieve the effects of improving reliability, calculating accuracy, and eliminating requirements for intersection angles
Active Publication Date: 2019-03-05
CHENGDU TIEAN SCI & TECH +1
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Problems solved by technology
[0005] In order to solve the problem in the prior art of using two light sections in conjunction with the contact line of the wheel tread and the rail to calculate the outer dimension of the wheel and introduce systematic errors, the present invention provides a new method for measuring the outer dimension of the wheel
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[0036] figure 1 It is a schematic diagram of a specific embodiment of the present invention, a centerline light source irradiating a wheel, figure 2 for shooting figure 1 The schematic diagram of the light section formed by the line light source on the wheel, image 3 It is a schematic diagram of a second centerline light source irradiating a wheel in a specific embodiment of the present invention, Figure 4 for shooting image 3 The schematic diagram of the light section formed by the line light source on the wheel, Figure 5 It is a schematic diagram of the measuring method of the wheel external dimension of the present invention, Figure 6 It is a schematic diagram of the method of calculating the wheel axis line according to the light section, Figure 7 According to the distance between the light section line and the axis line, the outline dimension profile of the wheel is drawn. The following will clearly and completely describe the technical solutions in the embod...
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The invention provides a method for measuring a boundary dimension of a wheel. The method comprises the following steps: irradiating the wheel with at least three line light sources; shooting a light cutting line formed by each line light source on the wheel; calculating the axis of the wheel with three intact light cutting lines along the width direction of the wheel; and determining boundary dimension parameters of the wheel according to the axis and the optical cutting lines. The wheel is irradiated with at least three line light sources; the axis of the wheel is calculated with at least three intact light cutting lines; and each optical cutting line is located on the wheel and is determined relative to the positional relationship of the wheel, so that the system error caused by rail deformation and snaking motion of the wheel along the rail when the axis of the wheel is calculated by two optical cutting lines and the third line, in contact with the rail, of the wheel in the prior art is avoided; and the reliability of wheel axis calculation is improved, so that the measurement accuracy of the boundary dimension of the wheel is improved.
Description
technical field [0001] The invention relates to the technical field of automatic detection of locomotive and vehicle wheels, in particular to a method for measuring the outer dimensions of wheels. Background technique [0002] The wheel set is a key part of the locomotive running, and the key dimensions of the wheel set are directly related to the driving safety. Therefore, how to accurately measure the size of the wheel set effectively and quickly, detect the wear and tear of the wheel set, and determine whether the wheel set needs to be replaced is of great significance to ensure the safety of railway transportation. [0003] At present, the methods for detecting the external dimensions of the wheelset mainly include the contact measurement method and the image measurement method. Among them, the image measurement method is widely used because of its non-contact detection. [0004] The existing non-contact wheel set detection method uses a line laser to irradiate the whe...
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IPC IPC(8): G01B11/00
CPCG01B11/002
Inventor 杨凯王泽勇高晓蓉彭朝勇赵全轲张渝彭建平戴立新
Owner CHENGDU TIEAN SCI & TECH