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Device and method for measuring urban rail vehicle wheel diameter based on multiple sensors

A technology for diameter measurement and urban rail vehicles, applied in measuring devices, electromagnetic measuring devices, electric/magnetic diameter measurement, etc., can solve the problems of complex system structure layout, poor anti-interference ability, high technical difficulty, etc., and achieve high-precision measurement, Easy to operate, simple method effect

Inactive Publication Date: 2017-05-17
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Static detection is carried out in the non-running state of the vehicle. Although this method has high accuracy, the detection efficiency is very low.
Dynamic detection is carried out in the running state of the vehicle, which is characterized by high detection accuracy, fast detection speed, high degree of detection automation, and does not occupy the vehicle's turnaround time, but it is difficult to implement and technically difficult
[0004] In the early days, the measurement technology based on CCD measurement and image measurement was generally used in China, but this method has complex system structure layout and poor anti-interference ability

Method used

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  • Device and method for measuring urban rail vehicle wheel diameter based on multiple sensors
  • Device and method for measuring urban rail vehicle wheel diameter based on multiple sensors
  • Device and method for measuring urban rail vehicle wheel diameter based on multiple sensors

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Effect test

Embodiment 1

[0053] combine figure 2 , the laser displacement sensor and the track are installed at an angle of 45° beside the track, then α is 45°, the sampling interval of the laser displacement sensor is 20ms, and the installation distance between the laser displacement sensor and the eddy current sensor is L 1 500mm, the installation distance L between the eddy current sensor and the speed sensor 2 is 80mm.

[0054] First record the measured value of the speed sensor as 1.51m / s, and group the detected distance values ​​by time, the wheels pass through the detection system, and the sensor outputs a total of 6 groups (t 1 , t 2 ,...,t 6 ) valid data, as shown in the table below.

[0055]

[0056] The detection value at each moment is transformed in time and space according to the following formula:

[0057] x i = l i ·cosα+vΔt i

[0058] the y i = l i · sinα

[0059] The transformed coordinates are shown in the table below:

[0060]

[0061] Calculate the wheel diamet...

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Abstract

The invention discloses a device and a method for measuring diameter of an urban rail vehicle wheel based on multiple sensors. The measuring device consists of a laser displacement sensor, a speed measuring sensor and a vortex sensor which are arranged along the direction of a steel rail, wherein the speed measuring sensor is used for detecting the speed of the wheel passing through a wheel diameter measuring device, the vortex sensor is used for positioning a wheel center to the part just above the sensor, the laser displacement sensor is used for measuring the distance between a wheel pedal surface and the laser sensor, a two-dimensional right-angle coordinate system is established to perform time and space reduction on the output points of the laser sensor at different times into a wheel circle, the diameter of the wheel is calculated by the reduction points at different times and the positioning point of the vortex sensor, and finally the diameter at different time is subject to error filtering and equalizing, so as to obtain the final diameter of the wheel. The device has the advantages that the online non-contact type measuring is realized; the speed is high, the accuracy is high, the structure is simple, and the like.

Description

technical field [0001] The invention relates to the technical field of railway vehicle detection, in particular to an urban rail vehicle wheel diameter detection device and method based on various sensors. Background technique [0002] In the urban rail transit system, the wheel is an important link that affects the safe operation, especially after the speed of the train is increased, the requirements for the shape and geometry of the wheel are higher. The wheelset device is to ensure the running and turning of the rolling stock on the rails, and to bear all the static and dynamic loads from the rolling stock. It is an extremely important part of the locomotive running structure. Defects such as wear, scratches, peeling, cracks and other defects on the tread surface and near surface of the wheel set are major factors that endanger driving safety. Due to the high-speed, heavy-loading and high-density operation, the wear and tear of locomotive wheels is becoming more and more...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B61K9/00G01B7/12G01B11/10
CPCB61K9/00G01B7/12G01B11/10
Inventor 王晓浩黄文石奋义王露王贵邢宗义
Owner NANJING UNIV OF SCI & TECH
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