Intelligent monitoring system for flexible passive protective net

Abstract

The invention relates to an intelligent monitoring system for a flexible passive protective net. The intelligent monitoring system of the flexible passive protective net includes a dangerous source capture system, a signal processing system and an alarm system. Under a condition that the signal processing system determines that dangers happen in the protective net and/or the protective net reaches a dangerous degree, alarm signals and/or intelligence information are/is sent in one or more methods. Fiber bragg grating sensors are preinstalled on lower support ropes of the flexible passive protective net. Through monitoring the tension of the lower support ropes of the protective net, signals related with rock fall and breakage of the protective net are monitored in a real-time manner and then the signals are returned to a fiber bragg grating demodulator.

Description

technical field [0001] The invention relates to the technical fields of optical fiber sensing, computer system integration and signal monitoring, in particular to the flexible protection technology for slope disasters, and is suitable for the safety monitoring of flexible passive protection nets. Background technique [0002] my country is a mountainous country, especially in the western and southeastern mountainous areas. Geological hazards on slopes such as landslides, debris flows, slides, slides, collapses and weathering spalling often occur, especially in linear projects such as railways and highways. The most serious disasters are along the line. The occurrence of disasters has the characteristics of many points, wide areas, and long lines. Under the condition of limited resources (manpower, material resources, and financial resources), protection and management are very difficult or even impossible to prevent. It has become the main factor that threatens the normal oper...

AI Technical Summary

Problems solved by technology

[0007] (1) For a flexible passive protective net system, the number of anchor ropes is large, and the force consistency on the anchor ropes is poor. In order to grasp the situation of the protective net, it is necessary to install tension sensors on each rope. The number of sensors used is large, and the installation cumbersome and high cost;

[0008] (2) As mentioned above, the force consistency on the anchor line is poor, which makes it necessary to set the alarm threshold separately;

[0009] (3) The tension sensor installed on the anchor rope cannot give an alarm for the rupture of the flexible passive protective net;

[0010] (4) The pull force of the upper support rope is greatly affected by the pull-up anchor rope and the decompression ring, the force is complicated, and the law of the alarm threshold is difficult to obtain;

[0011] (5) Improper monitoring location, defects in monitoring schemes, etc., resulting in serious under-reporting and false positives in the system

[0012] At present, the monitoring method of the flexible passive protective net is to monitor whether there is a rockfall impact by monitoring the tension change of the pull-up anchor rope, but the situation of the broken net of the protective net cannot be accurately judged. In actual engineering use, the broken net is regarded as a flexible passive protective net system. Therefore, this monitoring method will have false positives and false negatives

And for the flexible passive protective net system, a system includes several anchor ropes, and the pulling force of each anchor rope is inconsistent, which makes this kind of monitoring system unable to correctly judge the energy level of falling rocks, so it can only be used as an auxiliary means

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