Forest fire multi-defense-line real-time monitoring system based on distributed optical fiber sensing technology

Abstract

The invention relates to the technical field of fire early warning, in particular to a forest fire multi-defense-line real-time monitoring system based on a distributed optical fiber sensing technology. The system comprises an optical fiber temperature monitoring unit, a weight dynamic sensing unit and a fire early warning unit. And the optical fiber temperature monitoring unit is used for monitoring the temperature of the forest by adopting optical fiber sensing. According to the invention, the weight dynamic sensing unit dynamically adjusts the temperature threshold value according to the local meteorological change condition, when the forest environment temperature is reduced, the temperature threshold value is reduced, and when the environment temperature is increased, the temperature threshold value is increased, so that the forest temperature monitored by the optical fiber temperature monitoring unit is compared with the temperature threshold value, the comparsion result is output, the forest temperature monitoring effect of the optical fiber temperature monitoring unit is improved, fire signals can be output in time when a fire occurs, and the safety is higher.

Description

technical field [0001] The invention relates to the technical field of fire early warning, in particular to a forest fire multi-defense real-time monitoring system based on distributed optical fiber sensing technology. Background technique [0002] Forest fire refers to the forest fire behavior that loses human control, spreads and expands freely in the forest land, and brings certain harm and loss to the forest, forest ecosystem and human beings. Forest fire is a sudden, destructive, To deal with natural disasters that are difficult to rescue and fight forest fires, it is necessary to understand the law of forest fire burning, establish a strict emergency mechanism and a strong command system, organize a well-trained fire fighting team, and use effective, scientific methods and advanced methods. The fire extinguishing equipment shall be used to extinguish the fire in time to minimize the fire loss; [0003] At present, when carrying out real-time monitoring and early warni...

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Problems solved by technology

[0003] At present, when carrying out real-time monitoring and early warning of forest fires, distributed optical fiber temperature sensors are used to monitor the temperature of the forest. Since ordinary single-mode optical fibers are used as long-distance temperature sensors, the cost is low and it is very convenient to deploy in large-scale forest areas. When the temperature exceeds a certain threshold, an alarm is issued, and at the same time, the direction of the fire is predicted to be extinguished. Due to changes in seasonal climate and weather, the optical fiber temperature sensor senses a large range of forest temperature changes, and the temperature threshold has always remained a fixed value. In summer, when the temperature is high, It may be that the temperature monitored by the fiber optic temperature sensor is higher than the threshold because the weather itself is hot, which leads to misjudgment of fire. At the same time, when the temperature is low in winter, if a fire occurs, the temperature of the fire cannot reach the threshold in time due to the influence of low-temperature air and an alarm will be issued, resulting in the spread of the fire. It can only be discovered after it is too uncontrollable, so that the fire remedy is not timely and the practicability is lacking. In view of this, we propose a forest fire multi-line real-time monitoring system based on distributed optical fiber sensing technology

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