Foreign matter limit invasion monitoring system based on fiber Bragg gratings

Abstract

The invention discloses a foreign matter limit invasion monitoring system based on fiber Bragg gratings. The foreign matter limit invasion monitoring system based on the fiber Bragg gratings comprises a foreign matter limit invasion monitoring system, a monitoring host machine system and a foreign matter limit invasion sensing system. The foreign matter limit invasion sensing system is used for sensing foreign matter limit invasion information and transmitting the foreign matter limit invasion information to the foreign matter limit invasion monitoring system, after the foreign matter limit invasion monitoring system receives the foreign matter limit invasion information, the foreign matter limit invasion information is processed and converted into a sensing signal, the sensing signal is transmitted to the monitoring host machine system, and the monitoring host machine system stores and processes the foreign matter limit invasion information. According to the foreign matter limit invasion monitoring system based on the fiber Bragg gratings, a single-mesh double-optical network mode is adopted, a fault point can be accurately positioned, rapid positioning of faults is achieved, usability, safety and reliability are improved, and repairing and maintaining cost are saved. The foreign matter limit invasion monitoring system based on the fiber Bragg gratings is capable of achieving uninterrupted monitoring and effectively preventing accidents of derailing of a train and the like from happening before foreign matter limit invasion is beyond a safety range.

Description

technical field [0001] The invention relates to a foreign matter intrusion monitoring system, in particular to a fiber grating-based foreign matter intrusion monitoring system, which belongs to the technical field of disaster prevention and mitigation. Background technique [0002] Road and rail transport undertake most of the transport tasks on land. A well-developed road and railway transportation network is a prerequisite for any country or region to achieve rapid economic development. Along roads and railways, there are often quite a lot of disasters, such as strong winds, snowfall, floods, earthquakes, fires, landslides, falling rocks and subsidence of roadbeds, etc. Foreign matter invasion is also a kind of disaster that exists widely along highways and railways. [0003] The foreign matter intrusion monitoring system is a subsystem of the disaster prevention safety monitoring system. Among them, the foreign body invasion limit refers to the safety limit of foreign ...

AI Technical Summary

Problems solved by technology

Generally, the monitoring room is far away from the monitored part, and the monitoring signal needs to be transmitted over a long distance, resulting in a transmission area that is often much larger than the monitored area. Therefore, the probability of failure in the transmission area (such as: interference, damage, theft, etc.) The corresponding is relatively large. If the fault in the transmission area cannot be distinguished from the limit violation event in the monitoring part, the probability of false alarm is very high

The wiring method of the optical cable monitoring method is similar to that of the power grid, and has the advantages of being free from lightning and electromagnetic interference, but it still cannot distinguish the foreign matter intrusion event in the monitoring area from the fault in the transmission area

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