High speed railway settlement monitoring system based on fiber bragg gratings

Abstract

The invention belongs to the technical field of high speed railway settlement monitoring, and discloses a high speed railway settlement monitoring system based on fiber bragg gratings. The high speedrailway settlement monitoring system is used for solving the problem that an existing high speed railway settlement monitoring system is low in accuracy. The high speed railway settlement monitoring system comprises at least two fiber bragg grating level gages installed on a monitoring face; and each fiber bragg grating level gage comprises a shell, wherein the bottom of the shell is installed ona base, an elastic convoluted diaphragm is installed in the shell, and the shell is divided by the elastic convoluted diaphragm into an upper liquid containing zone and a lower installing cavity, thelower end face of the elastic convoluted diaphragm is provided with two optical grating fixing columns, a pressure measuring optical grating is installed between the two optical grating fixing columns, a temperature measuring optical grating is further installed in the installing cavity, the temperature measuring optical grating and the pressure measuring optical grating are connected with a datacollecting system, and the data collecting system transmits collected data to a control center.

Description

technical field [0001] The invention belongs to the technical field of high-speed railway subsidence monitoring, and in particular relates to a high-speed railway subsidence monitoring system based on an optical fiber grating, which is used for detecting high-speed railway subsidence. Background technique [0002] In recent years, the infrastructure construction of high-speed railways has developed rapidly, and high-speed traffic has also brought higher smoothness requirements to the line structure system. How to monitor the settlement and deformation of high-speed railway structures with high precision, real-time dynamics and long-term stability has become a key technical problem at present. [0003] Most of the traditional static levels currently used are contact measurement. The height change of the floating ball in contact with the liquid surface is used to reflect the height change of the liquid level. The floating ball connected to the guide rod changes with the water ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of low precision existing in the existing high-speed railway subsidence monitoring system, the present invention provides a high-speed railway subsidence monitoring system based on optical fiber gratings, which has the characteristics of high monitoring precision, and is not easy to be damaged and stable during use. High, no need to re-calibrate, and not susceptible to electromagnetic interference, and the invention can also reduce wiring

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