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

A real-time monitoring system and distributed optical fiber technology are applied in forest fire alarms, signal transmission systems, and non-electrical signal transmission systems. Improved monitoring effect and high safety effect

Active Publication Date: 2022-02-25
南京光蓝物联网科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

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,

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

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Example Embodiment

[0040] Example 1

[0041] See Figure 1 - Figure 3 As shown, the present embodiment provides a forest fire multi-defense line real-time monitoring system based on distributed optical fiber sensing techniques, including fiber-optic temperature monitoring unit 100, weight dynamic sense unit 200, and fire warning unit 300;

[0042] The fiber temperature monitoring unit 100 is used to monitor the temperature of the forest using fiber sensing distribution;

[0043] Among them, the fiber temperature monitoring unit 100 employs a fiber temperature detector, a fiber temperature detector is provided with a plurality of fiber optic temperature detectors distributed in the forest.

[0044] Specifically, the fiber-optic temperature detector includes a collimated lens, a diffraction grating, and an array silicon photodetector, first place the fiber in the focus of the collimated lens in the detector, and the light is exposed to the diffraction grating, The raster will be reflected by the spectr...

Example Embodiment

[0079] Example 2

[0080] Considering that the ambient temperature monitored by the fiber temperature monitoring unit 100 is larger than the temperature threshold, the output fire signal cannot be transmitted to the fire early warning unit 300 in time due to the interference of the external factors, resulting in a timely reception of fire information, so in order to improve fire signals The intensity of the transmission is different from the first embodiment, wherein:

[0081] The fire early warning unit 300 also includes a signal enhancement module, and the signal enhancement module is used to increase the intensity of the fire signal transmission to the fire early warning unit 300.

[0082] Specifically, the signal enhancement module uses a wavelet domain signal enhancement algorithm, including the following steps:

[0083] First, according to the nature of the fire signal, a variety of mathematical methods are used in a variety of mathematical methods in the wavelet domain, and...

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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...

Claims

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Application Information

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IPC IPC(8): G08B17/00G08B17/06G08C23/06G01K11/3206
CPCG08B17/005G08B17/06G08C23/06G01K11/3206
Inventor 吴东方张大伟郑改革聂百胜钱征华叶全意
Owner 南京光蓝物联网科技有限公司
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