Comprehensive monitoring and intelligent analysis method of safe state of rail system

A comprehensive monitoring and system security technology, applied in the direction of track, track maintenance, road, etc., can solve the problem of not being able to grasp the safe service status of the track system in real time

Pending Publication Date: 2018-03-30
BEIJING JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a comprehensive monitoring and intelligent analysis method for

Method used

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  • Comprehensive monitoring and intelligent analysis method of safe state of rail system
  • Comprehensive monitoring and intelligent analysis method of safe state of rail system
  • Comprehensive monitoring and intelligent analysis method of safe state of rail system

Examples

Experimental program
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Example Embodiment

[0081] Example 1

[0082] This embodiment provides a detailed process for monitoring low-frequency data of the track system using the present invention. For low-frequency orbit data, fiber grating technology is used to collect. Fiber grating is made using the photosensitivity of optical fiber. When the temperature, stress, strain or other physical quantity of the fiber grating is changed, the period of the grating or the refractive index of the core will change, so that the wavelength of the reflected light will change. By measuring the change of the reflected light wavelength before and after the change of the physical quantity , You can get the change of the physical quantity to be measured. Utilizing the characteristics of the fiber grating, the present invention provides a fiber grating stress, displacement and temperature sensor installation method matching the high-speed railway track structure.

[0083] Such as figure 2 Shown is the installation flow chart of the rail st...

Example Embodiment

[0094] Example 2

[0095] This embodiment provides a detailed process for monitoring the expansion and contraction of the high-speed rail turnout switch rail using the present invention. For track sensitive structures that cannot be installed with fiber grating sensors such as turnout switch rails, the present invention uses the characteristics of non-contact, multi-scale and large amount of information of video sensing technology to install cloud-type cameras near the sensitive parts of the switch switch rail tip, and cooperates with the switch rail Stick a ruler in the center to realize non-contact real-time monitoring.

[0096] Video recognition mainly includes three links: front-end video information collection and transmission, intermediate video detection, and back-end analysis and processing. The invention uses the switch point rail displacement data acquisition module of the video acquisition camera to provide a clear and stable video signal; then the video data is filtere...

Example Embodiment

[0102] Example 3

[0103] This embodiment provides a detailed process for monitoring high-frequency data of a track system using the present invention. The invention is based on the advantages of self-compensation, self-correction, and long-term stability of the modified stress-strain technology, combined with the on-site environmental conditions, and monitors the transverse stress and vertical stress of the steel rail through the installation of stress stickers.

[0104] Such as Picture 8 As shown, the vertical force test strain rosette is pasted near the middle and axis of the rail, and is ±45°C in the longitudinal direction of the rail. The vertical stress bridge adopts a full bridge. In the bridge circuit subjected to vertical stress, A and C correspond to voltage input, and B and D correspond to signal output. In the embodiment, the stress rosettes are applied in pairs with the neutral axis as the center (60kg / m steel rail, the neutral axis is 8.123 cm from the bottom of th...

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PUM

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Abstract

The invention discloses a method for comprehensive monitoring and intelligent analysis of the safety state of a rail system. The method combines three sensing monitoring technologies, monitors low-frequency data such as structural temperature based on optical fiber grating technology, and uses corrected stress-strain technology to monitor the horizontal and vertical rails. High-frequency data such as axial stress, and for sensitive structures that are difficult to measure, such as switch point rails, use video perception technology to observe large deformation and surface conditions of the structure, forming an all-weather system monitoring of the railway track system from appearance to interior, from high frequency to low frequency. Through fusion and analysis of the collected multi-source data, the track status can be effectively evaluated, diagnosed and predicted, and then timely early warning of the track safety status can be realized. The invention has reasonable arrangement of measuring points, high degree of automaticity in the monitoring process, accurate evaluation of line status, timely early warning of abnormal conditions, realizes safe and controllable service of the railway track system, and provides reliable guarantee for safe and stable operation of trains.

Description

technical field [0001] The invention relates to a railway engineering monitoring method, in particular to a comprehensive monitoring and intelligent analysis method for the safety state of a rail system. Background technique [0002] As the backbone of the comprehensive transportation system, railway plays an important role in promoting national economic and social development. With the rapid development of my country's economy, rail transportation represented by high-speed railway has developed rapidly, and its operation quality and construction scale have reached the world's leading level. However, with the advancement of the wave of high-speed railway construction, the issue of safe service of lines and infrastructure has become increasingly prominent. [0003] The operation practice of high-speed railways shows that under long-term repeated loads, the microscopic damage of key infrastructure represented by lines, bridges and tunnels, the functional deterioration of main...

Claims

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Application Information

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IPC IPC(8): E01B35/12
CPCE01B35/12
Inventor 高亮蔡小培周陈一马卓然常文浩杨晓吕宋
Owner BEIJING JIAOTONG UNIV
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