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Train axle space straightness measuring method

A space straightness, train axle technology, applied in the direction of measuring devices, image data processing, biological neural network models, etc., can solve the problems of non-contact measurement methods such as errors and low calculation accuracy, and achieve accurate cross-sectional information and straightness , the effect of high measurement accuracy

Inactive Publication Date: 2019-11-19
CHANGCHUN INST OF TECH
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for measuring the straightness of the train axle space, which can solve the problems of errors and low calculation accuracy in the current non-contact measurement method

Method used

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  • Train axle space straightness measuring method
  • Train axle space straightness measuring method
  • Train axle space straightness measuring method

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Embodiment Construction

[0045] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art.

[0046] refer to figure 1 As shown, the method for measuring the spatial straightness of a train axle provided by an embodiment of the present invention includes:

[0047] S11. The line structured light 3D sensor is moved along the axial direction of the train axle to obtain point cloud data of multiple sets of measured train axle information;

[0048] S12, applying a neural network to preprocess the point cloud data;

[0...

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Abstract

The invention discloses a train axle space straightness measurement method, which comprises the following steps of: obtaining point cloud data of multiple groups of measured train axle information through the axial movement of a line structured light 3D sensor along a train axle; preprocessing the point cloud data by using a neural network; performing spatial circle fitting on the preprocessed point cloud data to generate circle center coordinates of each section of the train axle; projecting the circle center coordinate of each section; and fitting the spatial line projected to the plane according to a wolf pack algorithm, restoring the spatial line into a spatial straight line, and calculating the straightness of the spatial straight line. The method comprises the steps that train axle section information is collected through a line structured light sensor, and denoising processing is conducted on point cloud data through a neural network; acquiring the section circle center of the train axle by using a space circle fitting algorithm, and completing train axle space straightness measurement in combination with a wolf pack algorithm; accurate train axle section information and straightness can be obtained, and the measurement accuracy is high.

Description

technical field [0001] The invention relates to the technical field of rail traffic safety monitoring and machine vision, in particular to a method for measuring the spatial straightness of a train axle. Background technique [0002] Straightness is one of the key factors reflecting the quality of the train axle, which affects the radial runout of the train wheelset, which directly affects the stability of the train operation. Therefore, the precise measurement and inspection of the machining dimensions of the train axles has become an important link to ensure the safe operation of the train. [0003] The straightness measurement methods of large train shaft parts used in rail trains can be divided into contact measurement and non-contact measurement. Contact measurement includes conventional form error detection methods such as using digital micrometers or specific measuring equipment to measure, but this type of contact measurement is an offline measurement method, which ...

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Application Information

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IPC IPC(8): G06T7/00G06T7/62G06T7/70G01B11/27G06K9/62G06N3/04
CPCG06T7/0004G06T7/70G06T7/62G01B11/27G06N3/04G06F18/214
Inventor 张爽王华侯岱双高金刚陈儒赵伟甫
Owner CHANGCHUN INST OF TECH
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