Optical fiber on-line vehicle bearing fault detection device

A technology of fault detection and optical fiber, which is applied in the direction of optical testing for flaws/defects, can solve problems such as interference and low accuracy of real-time health monitoring of heavy-duty rails, and achieve the effect of improving monitoring accuracy

Active Publication Date: 2013-06-26
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing vehicle bearing fault measurement device is easily interfered by motor and other on-board equipment and communication signals of the power grid, and the real-time health monitoring accuracy of heavy-duty rails is low, and provides an optical fiber online vehicle bearing fault detection device

Method used

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  • Optical fiber on-line vehicle bearing fault detection device
  • Optical fiber on-line vehicle bearing fault detection device
  • Optical fiber on-line vehicle bearing fault detection device

Examples

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specific Embodiment approach 1

[0009] Specific embodiment one: combine figure 1 , figure 2 , image 3 with Figure 4 Describe this embodiment, the optical fiber online vehicle bearing fault detection device of this embodiment, it comprises sensor 1, A / D converter 4, signal processing system 5, photodetector 6, broadband light source 7, wavelength division multiplexer 8 , coupler 9, scanning interferometer 10 and signal generator 12, the output end of the sensing signal of sensor 1 is connected with the input end of the sensing signal of wavelength division multiplexer 8, the output end of broadband light source 7 is connected with wavelength division multiplexing The input end of the laser of the use device 8 is communicated, the output end of the wavelength division multiplexer 8 is communicated with a signal input end of the coupler 9, and the other signal input end of the coupler 9 is communicated with the signal output end of the scanning interferometer 10, The output end of the signal generator 12 ...

specific Embodiment approach 2

[0012] Specific embodiment two: combine figure 2 This embodiment is described. This embodiment is a further limitation of the optical fiber online vehicle bearing fault detection device described in Embodiment 1. The bottom surface of the base box 1-2 is an arc surface.

[0013] The bottom surface of the base box 1-2 corresponds to the arc of the outer surface of the axle box cover of the vehicle bearing, so that the sensor 1 is closely arranged on the axle box cover.

specific Embodiment approach 3

[0014] Specific embodiment three: combine figure 1 This embodiment is described. This embodiment is a further limitation of the optical fiber online vehicle bearing fault detection device described in Embodiment 1. It also includes a phase demodulator 11, which is connected in series with the signal generator 12 and the scanning In the optical path between interferometers 10.

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Abstract

The invention relates to an on-line vehicle bearing fault detection device, and in particular relates to an optical fiber on-line vehicle bearing fault detection device, aiming at solving the problems that an existing vehicle bearing fault detection device is easily interfered by vehicle equipment such as a motor as well as communication signals of a power grid, and real-time health monitoring accuracy of a heavy rail is low. The optical fiber on-line vehicle bearing fault detection device comprises a sensor, an analog to digital (A/ D) converter, a signal processing system, a photoelectric detector, a broadband light source, a wavelength division multiplexer, a coupling, a scanning interferometer and a signal generator, wherein the output end of the sensor is communicated with the input end of the wavelength division multiplexer; the broadband light source is communicated with the input end of the wavelength division multiplexer; the wavelength division multiplexer is communicated with one signal end of the coupling; the coupling is communicated with the scanning interferometer; the signal generator is communicated with the scanning interferometer; thr signal output end of the coupling is communicated with the photoelectric detector; the photoelectric detector is communicated with the A/ D converter; and the output end of the A/ D converter is communicated with the signal processing system. The device is used for detecting the fault of an on-line vehicle bearing.

Description

technical field [0001] The invention relates to an online vehicle bearing fault detection device. Background technique [0002] With the intelligent upgrading of the national railway system, the running speed of trains has been increased many times, and the safety of railway transportation has been challenged unprecedentedly. During the operation of high-density, high-load and high-speed railways, the load on vehicle bearings increases, which can easily cause problems such as bearing fatigue, cracks and indentations, and even cause bearing breakage, which will bring great damage to the locomotive. Shock and vibration may even endanger driving safety. Therefore, the online detection of the running state of the vehicle bearing and the timely forecast of the vehicle bearing failure are of great importance in order to take corresponding countermeasures to solve them and ensure the safety of driving. [0003] In recent years, some progress has been made in the installation of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/89
Inventor 刘盛春陈雪峰张金涛张云龙李坤
Owner HEILONGJIANG UNIV
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