High-speed train rail transit failure safety monitoring and early warning system and signal processing method

A rail transit and fail-safe technology, applied in railway traffic management, signal indicators on vehicles, railway signals, etc., can solve problems such as large limitations, inability to obtain information at the first time, poor signal-to-noise ratio, etc., and achieve enhanced efficiency effect

CN111071300BActive Publication Date: 2021-12-14TAIYUAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-12-14

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Abstract

The invention discloses a train rail transit failure safety monitoring and early warning system and a signal processing method, which combines a vibration sensing system based on Sagnac interference with a phase-sensitive optical time-domain reflection vibration detection system based on coherent detection, and can control the steering Frames and rails for damage monitoring. The vibration of the bogie is monitored by the Sagnac interferometer, distributed optical fibers are deployed outside the rail, and the phase-sensitive optical time-domain reflection vibration detection system is used to monitor the vibration of the rail; short-time Fourier transform is used for time-frequency analysis, Establish a spectrum feature database for spectrum analysis, establish vibration feature vectors, use correlation vector products for vibration pattern recognition, and realize monitoring and early warning of train running status and track safety and health damage. It has the advantages of intrinsic safety, high signal measurement accuracy, direct restoration of signal phase information, high reliability, good real-time performance, long sensing distance, and early access to train rail transit hazard warning information, etc.
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Description

technical field

[0001] The invention relates to the field of distributed optical fiber sensing technology and the field of train track detection, in particular to a high-speed train track traffic failure safety monitoring and early warning system and a signal processing method. Background technique

[0002] At present, many rail transit projects at home and abroad have different degrees of potential safety hazards. The health monitoring of trains and tracks plays a vital role in people's lives and property safety. With the increase of the running time of rail transit projects and the long-term operation of trains, due to the influence of environmental loads, fatigue effects, corrosion and material aging and other unfa Inevitably, damage accumulation and resistance attenuation will occur in the track structure. If it is not detected and treated in time, the damage will expand rapidly. Once the damage of the key structural components accumulates to a certain extent, it will ...

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Embodiment Construction

[0027] The technical solutions of the present invention will be further described in more detail below in conjunction with specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Attached below figure 1 , attached figure 2 And attached image 3 Further illustrate the operating principle and concrete working process of a kind of high-speed train of the present invention and rail transit failure safety monitoring and early warning system:

[0029] Such as figure 1 with figure 2 As shown, the present invention provides a high-speed train rail traffic failure safety monitoring and early warning system. The bogie at the bottom of the train is mainly composed of frame, wheel set,...