Rockfall monitoring and alarm system along the railway

Abstract

Disclosed are an on-site monitoring device, a signal processing system and a monitoring and alarm system. The on-site monitoring device includes optical-fiber sensor single bodies or a distributed-type array formed by the optical-fiber sensor single bodies; and a fiber bragg grating demodulator, wherein the fiber bragg grating demodulator is connected with the optical-fiber sensor single bodies or the array formed by the optical-fiber sensor single bodies through signal transmission optical fibers. The fiber bragg grating sensors are arranged at preset positions of the railway and used for monitoring in a real-time manner related signals when falling rocks fall on the railway and returning the signals to the fiber bragg grating demodulator.

Description

technical field [0001] The invention relates to on-site monitoring equipment, a signal processing system and a monitoring and alarming system, and more particularly relates to on-site monitoring equipment, a signal processing system and a monitoring and alarming system for dangerous rockfall along railway lines. Background technique [0002] Falling rocks, as a shallow surface failure mode of slopes, especially high and steep slopes, are one of the serious geological disasters. It has strong suddenness, large randomness, fast speed and violent occurrence, and has always been the focus of slope engineering investigation. Since the dangerous rock masses that cause landslide disasters are mostly distributed on high and steep slopes, it will take a lot of manpower and material resources to completely treat them from the source. At present, more protection measures are taken before the disaster. Rockfall is a frequent geological disaster in mountainous areas of our country, whic...

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Problems solved by technology

[0004] In terms of rockfall monitoring technology along the railway, some research and application have been carried out at home and abroad, but the following problems generally exist: First, some monitoring equipment is expensive and cannot Second, damage and inaccurate data caused by improper installation methods of test components often occur. Third, it is difficult to determine the forecast model and alarm trigger conditions. Influence is prone to failure

[0006] (1) Electric measurement method: strain resistance is used, which has low precision, poor anti-interference ability, short life, needs power supply on site, and difficult long-distance transmission of signals, so it is not suitable for long-term monitoring;

[0007] (2) GPS method: the satellite positioning system is used, the on-site equipment needs to be maintained, the site needs power supply, and the signal cannot be obtained in special areas, especially the stress change inside the geology cannot be measured, so it is impossible to predict the collapse, such as multi-point monitoring , the system is expensive;

However, rain, fog and snow are difficult to identify and cannot be forecasted, and power is needed on site, and the equipment is easily damaged;

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