All-optical-fiber temperature monitoring system for gob under coal mine

Abstract

The invention relates to an all-optical-fiber temperature monitoring system for a gob under a coal mine. The all-optical-fiber temperature monitoring system comprises a distributed optical fiber temperature measuring host machine (1), an industrial personal computer (2), a fire-fighting power supply (3), an alarm device (4), a temperature sensing optical cable (5) and a pay-off device (6), wherein a test system consists of the distributed optical fiber temperature measuring host machine 1, the industrial personal computer 2, the fire-fighting power supply 3, the alarm device 4; the test system is put into an underground pump room or machine room (10); one end of the temperature sensing optical cable (5) is connected with an optical cable adapter of the distributed optical fiber temperature measuring host machine (1) of the test system, and the other end of the temperature sensing optical cable (5) is wound on the pay-off device (6); the pay-off device (6) is fixed on a coal cutter hydraulic bracket (7); a data serial port of the distributed optical fiber temperature measuring host machine (1) and a data serial port of the alarm device (4) are connected with a data serial port of the industrial personal computer (2) respectively; and an external power supply is connected to the input interface of the fire-fighting power supply (3). The installation position of the all-optical-fiber temperature monitoring system is limitless, so safety potential hazard is avoided; and a signal transmission distance can meet a requirement for large-range and long-distance monitoring.

Description

technical field [0001] The invention relates to an all-optical fiber temperature monitoring system for goafs in underground coal mines. Apply this system to the goaf in underground coal mines to realize early warning of fires in the goaf and eliminate fire hazards. Background technique [0002] Fire monitoring is of great significance to ensure safe production in coal mines. Coal seam spontaneous combustion fire is one of the main disasters in mines, which seriously threatens the safety of coal mine personnel and causes great economic losses. Coal seam spontaneous combustion fire has become one of the main factors restricting the safe production and development of high-yield and high-efficiency mines. Coal mine goaf refers to the cavity or cavity left after the mining of underground coal or coal gangue in the process of coal mine operation. During the mining process of the coal mining machine, since the floating coal scattered in the goaf is relatively broken and loose, a...

AI Technical Summary

Problems solved by technology

However, the traditional electrical temperature sensor requires power supply, the installation location is limited, and the environment in the goaf is harsh, so the electrical sensor is not easy to deploy; and the signal transmitted is an electrical signal, which requires many cable connections, and there are many potential safety hazards. The transmission distance is difficult to meet the needs of large-scale and long-distance monitoring

If wireless sensors are used to implement, there are disadvantages such as difficulty in layout, difficulty in guaranteeing anti-interference ability, reliability, energy consumption, etc.

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