Positioning and real time tracing system for temperature insensitive optical fiber optical grating stress sensing train

A fiber grating and train positioning technology, which is applied in transportation and packaging, railway car body parts, vehicle route interaction equipment, etc., to achieve the effects of shortening the time between trains, improving positioning accuracy, and cheap sensitivity

Inactive Publication Date: 2008-10-29
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of overcoming temperature stress cross-sensitive distributed fiber grating sensing to realize train positioning and real-time tracking has not yet been reported.

Method used

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  • Positioning and real time tracing system for temperature insensitive optical fiber optical grating stress sensing train
  • Positioning and real time tracing system for temperature insensitive optical fiber optical grating stress sensing train
  • Positioning and real time tracing system for temperature insensitive optical fiber optical grating stress sensing train

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Experimental program
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Effect test

Embodiment 1

[0040] The present invention proposes a temperature-insensitive fiber grating stress sensor train positioning and real-time tracking system, the connections between the components are as follows, see image 3 :

[0041] Just below a rail C10 of a railway line, fiber grating stress sensors A211...A21n are buried. The central wavelengths of these fiber grating stress sensors are different, and each fiber grating stress sensor with a different central wavelength represents a Geographic location, the upper end surface 21 of the fiber grating stress sensor is in contact with the bottom surface of the rail, the distance between two fiber grating stress sensors is 100 meters, and the connection between the adjacent two is the right port 73 of the right circulator 70 of one and the left port of the other The left port 11 of the circulator 10 is connected with an optical fiber;

[0042] The broadband light source A10 installed at the train departure station is connected to the left po...

Embodiment 2

[0052] A temperature-insensitive fiber grating stress sensor train positioning and real-time tracking system proposed by the present invention, the connection between the components is as follows, see Figure 4 :

[0053] Right below each rail C10 of the two railway lines, fiber grating stress sensors A211...A21n and fiber grating stress sensors A221...A22n are buried. The central wavelengths of these fiber grating stress sensors are different. The same, each wavelength of the fiber grating stress sensor represents a geographic location, the upper end surface 21 of the fiber grating stress sensor is in contact with the bottom surface of the rail, the two fiber grating stress sensors are separated by 500 meters, and the connection between adjacent two is a right The right port 73 of the circulator 70 is connected with the left port 11 of another left circulator 10 with an optical fiber;

[0054] The broadband light source A10 installed at the departure station of the train is ...

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Abstract

The invention discloses a fibre grating stress sensing train positioning and real-time tracking system which is insensitive to temperature. The system of the invention is characterized in that a plurality of fibre grating stress sensors (A211...A21n)...(A211...A21n) with different central wavelengths are embedded just below one steel rail of each line of the railway with the interval of 100-500 meters. A broadband light source (A10) is connected with a fast optical switch (A20) and a first fibre grating stress sensor (A211...a2m1); a final fibre grating stress sensor (A21n...A2mn) is connected with an optical amplifier (A30), a wavelength-division element (A41), a high-speed optical switch (A42), an O / E converter (A43), a digital signal processing module (A44), a host computer (A45), as well as a server (A47) and a large screen (A46) which memorize three-dimensional electronic maps. The fibre grating stress sensing train positioning and real-time tracking system is suitable for the positioning and real-time tracking of the high-speed railway trains.

Description

technical field [0001] The invention relates to a temperature-insensitive optical fiber grating stress sensing train positioning and real-time tracking system, which is suitable for the fields of optical fiber communication, optical fiber sensing, train safety operation, traffic information engineering and control technology, and is especially suitable for high-speed railway train operation control and Train real-time tracking technology field. Background technique [0002] High-speed railway is not only the requirement of rapid transportation for social development, but also the mainstream of railway development in various countries in the world. How to realize real-time tracking of high-speed trains to ensure driving safety and improve transport capacity is becoming increasingly important. [0003] In order to ensure the safe running of high-speed trains, many different control systems have been studied in the world. [0004] Developments vary from country to country, and...

Claims

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Application Information

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IPC IPC(8): B61L25/00B61L1/02
Inventor 裴丽宁提纲董小伟延凤平祁春慧赵瑞峰阮乂吴树强刘俊杰
Owner BEIJING JIAOTONG UNIV
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