High-speed train wheel diameter dynamic detection method based on laser measurement

A train wheel, dynamic detection technology, applied in the field of traffic safety engineering, can solve the problems of difficult installation work and inability to analyze the visual measurement method calibration, and achieve the effects of satisfying detection accuracy, low installation location requirements, and simple calibration method.

Pending Publication Date: 2022-07-15
NANJING UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In actual application, neither the one-dimensional laser sensor nor the one-dimensional laser sensor with eddy current sensor can analyze the serpentine shape of the train wheel set and the eccentric wear of the wheel set. many questions

Method used

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  • High-speed train wheel diameter dynamic detection method based on laser measurement
  • High-speed train wheel diameter dynamic detection method based on laser measurement
  • High-speed train wheel diameter dynamic detection method based on laser measurement

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Embodiment

[0054] In the present embodiment, a method for dynamically detecting the diameter of a high-speed train wheel based on laser measurement includes the following steps:

[0055] Step 1: Determine the installation position and angle of the two laser sensors for measuring wheel diameter, and calibrate their spatial positions. The process is as follows:

[0056] Install the two laser sensors for measuring the wheel diameter on the inner side of the rail closer to the rail, 120cm horizontally away from the other side of the rail and 30mm below the rail plane, so that the irradiation plane of the two laser sensors is parallel to the rail, and the two laser irradiation planes are staggered up and down They are separated by 20mm and parallel to each other, and the included angle between the laser irradiation plane and the plane of the rail is 6°.

[0057] Two standard blocks are placed on the track, and the two blocks are staggered, parallel to each other, and separated by a certain di...

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Abstract

The invention discloses a high-speed train wheel diameter dynamic detection method based on laser measurement. The method comprises the following steps: determining the mounting positions and angles of two laser sensors for measuring the wheel diameter, and calibrating the spatial positions; a laser sensor irradiates a wheel and collects data, and effective data frames in the collected data are selected; filtering data frames with hopping in the effective data frames; calculating first-order linear fitting of a coordinate point set according to the filtered data frames, and correcting the data frames with snakelike motion; the wheel inner end face lengths measured by the two sensors in the data frame after the snakelike correction are calculated, and the average value of the lengths is taken as the effective measurement length of the sensor of the single wheel; and calculating the wheel diameter through a wheel diameter calculation formula. The method is simple in measurement principle, high in practicability, easy and convenient to calibrate and high in measurement precision, and online dynamic detection of train wheel parameters can be achieved through expansion.

Description

technical field [0001] The invention belongs to the technical field of traffic safety engineering, in particular to a method for dynamic detection of the wheel diameter of a high-speed train based on laser measurement. Background technique [0002] The train wheelset is one of the key components of the vehicle, and its parameters directly affect the comfort of passengers and the safety of operation. During the operation of the train, the tread and rim part of the wheelset contact and rub against the rail, which will cause the wheel rim to rub. Wear changes the wheel diameter parameters. In order to ensure that the wheel wear degree is within a safe range, it is of great significance to grasp the status of the wheel parameters. [0003] In the wheel measurement method of high-speed trains, manual measurement has been overshadowed by the gradual rise of automated bed measurement and high-precision laser measurement. In recent years, many scholars have studied non-contact wheel...

Claims

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Application Information

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IPC IPC(8): G01B11/08
CPCG01B11/08
Inventor 王孟尧訚劲松邢宗义
Owner NANJING UNIV OF SCI & TECH
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