Railway rockfall early warning system and method

Abstract

The invention discloses a railway rockfall early warning system and method. The railway rockfall early warning system comprise a fiber bragg grating vibration sensing part, a fiber bragg grating demodulating instrument and an analyzing and alarming device, wherein the fiber bragg grating vibration sensing part is provided with a fiber bragg grating suitable for generating strains along with the vibration of a track; the fiber bragg grating demodulating instrument is used for guiding light emitted by a light source to the fiber bragg grating, receiving light reflected back from the fiber bragg grating and outputting an electric signal reflecting wavelength variation, caused by the strains, of the reflected light; and the analyzing and alarming device is used for acquiring the wavelength variation information of the light reflected back from the fiber bragg grating so as to determine whether to give out an alarm on the fault of the track. The invention also relates to a railway rockfall early warning method, comprising the following steps of: providing the fiber bragg grating generating strains along with the vibration of the track; acquiring the electric signal reflecting the wavelength variation of the light reflected back from the fiber bragg grating through the fiber bragg grating demodulating instrument; acquiring the wavelength variation information of the light reflected back from the fiber bragg grating on the basis of the electric signal; and determining whether to give out an alarm on the basis of the wavelength variation information.

Description

technical field [0001] The invention relates to a railway rockfall early warning system and a railway rockfall early warning method using optical fiber gratings. Background technique [0002] For the slopes along the railway line, once rockslides occur, it will have a huge impact on the railway, railway transportation production, safety management, operational efficiency and economic benefits. Eliminating or reducing the various inducing factors and degrees of rockfall and rockfall can play a preventive role to some extent, but it cannot fundamentally solve the threat posed by rockfall and rockfall to the railway along the line. [0003] Therefore, there is an urgent need for early warning of the situation of falling on the railroad tracks of landslides in reality. Commonly used methods are: [0004] The electrical measurement method uses a strain resistance, which has low precision, poor anti-interference ability, and short life. It needs a power supply on site, and the s...

AI Technical Summary

Problems solved by technology

When using the above-mentioned sensor to sense the vibration of rails or sleepers, since there is a high-voltage power source forming an interference source near the rail, the above-mentioned electric sensor has the problem of low measurement accuracy in the environment of high magnetic field and high electric field

Images