Spontaneous fire monitoring device for coal mine based on fiber bragg grating sensors

Abstract

The invention belongs to the technical field of coal mine fire monitoring and in particular relates to a spontaneous fire monitoring device for a coal mine based on fiber bragg grating sensors. Watermanifolds are arranged on two sides of the bottom end of a roadway, and the end parts of the water manifolds are connected to a high pressure water pump; water accumulating walls are paved to the inner wall of the roadway uniformly and water accumulating cavities are formed in the water accumulating walls; the bottom ends of the water accumulating walls communicate to the water manifolds, and thetop ends of the water accumulating walls are connected to a fixed through pipe; water spraying convex strips are arranged on the outer walls of the water accumulating walls; elastic sealing balls arearranged in the water accumulating cavities and are slidably arranged in the water spraying convex strips; a plurality of fiber bragg grating sensors are paved at the bottom end of the roadway; an optical grating adjustor is eclectically connected to a control terminal; and the control terminal can control a water spraying pressure of the high pressure water pump, so that areas of water curtains sprayed by the water spraying convex strips in the roadway can be adjusted and therefore, the temperature in the roadway or high temperature as a result of a fire can be reduced for extinguishing the fire.

Description

technical field [0001] The invention belongs to the technical field of coal mine fire monitoring, in particular to a coal mine natural fire monitoring device based on an optical fiber grating sensor. Background technique [0002] Fiber Bragg grating sensors can realize direct measurement of physical quantities such as temperature and strain. Because the fiber grating wavelength is sensitive to temperature and strain at the same time, that is, the temperature and strain cause the fiber grating coupling wavelength shift at the same time, so the temperature and strain cannot be distinguished by measuring the fiber grating coupling wavelength shift. [0003] Coal mines are places where accidents occur frequently, especially coal mines where spontaneous combustion occurs. When spontaneous combustion fires occur in coal mines, the danger is extremely serious, not only in a large proportion, but also in a wide area. There is a possibility of spontaneous combustion in every mining ...

AI Technical Summary

Problems solved by technology

[0004] It is difficult for the existing natural fire monitoring device to monitor the temperature distribution according to the fiber grating sensor, and then control the fire extinguishing device to carry out fire extinguishing operations on the temperature generated in different areas, thereby causing a certain waste of the fire extinguishing device, and it is difficult to achieve efficient fire extinguishing effect

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