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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

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a comprehensive monitoring and intelligent analysis method for the safety status of the rail system. Advance prediction and early warning of dangerous situations

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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Effect test

Embodiment 1

[0082] This embodiment gives a detailed process of using the present invention to monitor the low-frequency data of the track system. For orbital data with lower frequencies, fiber grating technology is used to collect them. Fiber Bragg gratings are made using the photosensitivity of optical fibers. When the temperature, stress, strain or other physical quantities of the environment where the fiber grating is located change, the period of the grating or the refractive index of the fiber core will change, so that the wavelength of the reflected light will change. By measuring the change of the wavelength of the reflected light before and after the physical quantity changes , the change of the physical quantity to be measured can be obtained. Utilizing the characteristics of the optical fiber grating, the invention provides an installation method for the stress, displacement and temperature sensors of the optical fiber grating that match the track structure of the high-speed ra...

Embodiment 2

[0095] This embodiment provides a detailed process of monitoring the expansion and contraction of the point rail of a high-speed railway switch using the present invention. For track sensitive structures such as turnout point rails where fiber optic grating sensors cannot be installed, the present invention utilizes the characteristics of non-contact, multi-scale and large amount of information of video sensing technology to install a pan-mounted camera near the sensitive part of the switch point rail tip, and cooperate with the point rail The ruler is pasted 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 present invention utilizes the data acquisition module of switch tip rail displacement of the video acquisition camera to provide clear and stable video signals; then filters and de...

Embodiment 3

[0103] This embodiment gives a detailed process of using the present invention to monitor the high-frequency data of the track system. 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 environmental conditions on site, and monitors the lateral stress and vertical stress of the rail by installing stress decals.

[0104] Such as Figure 8 As shown, the vertical force test strain rosette is pasted near the neutral axis of the rail, and is at ±45°C from the longitudinal direction of the rail. The vertical stress bridge adopts the 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 decals are pasted in pairs with the neutral axis as the center (60kg / m rail, the distance between the neutral axis and the rail bottom is 8.123cm), and the distance betwee...

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Abstract

The invention discloses a comprehensive monitoring and intelligent analysis method of a safe state of a rail system. The method fuses three sensing monitoring technologies, monitors low frequency datasuch as structure temperature based on a fiber grating technology, adopts a modified stress-strain technology to monitor high frequency data such as transverse stress and vertical stress of a steel rail, and utilizes a video sensing technology to observe large structure deformation and surface states for sensitive structures difficult in contact measurement such as a turnout switch rail, therebyrealizing all-weather system monitoring of a railway rail system from exterior to interior and from high frequency to low frequency. By performing fusion analysis on the collected multi-source data, the state of a rail can be effectively evaluated, diagnosed and predicted, thereby realizing timely early warning of the safe state of the rail. The method disclosed by the invention has the advantagesthat the arrangement of measuring points is reasonable, a monitoring process has a high degree of automation, a line state can be evaluated accurately, the early warning of an abnormal condition is timely, the service of the railway rail system is safe and controllable, and a reliable guarantee is provided for safe and stable operation of a train.

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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