Roadway gas monitoring system based on optical fiber grating sensing technology

Abstract

The invention discloses a roadway gas monitoring system based on an optical fiber grating sensing technology, belonging to the roadway gas monitoring system. The monitoring system comprises a grating optical fiber sensor set, an underground alarm protective device, an optical fiber, a mining optical cable, an optical fiber grating demodulator and a computer system, wherein the grating optical fiber sensor set is arranged on a roadway tunneling working surface and a roadway air return port; the grating optical fiber sensor set is connected to the mining optical cable by the optical fiber; the mining optical cable is connected with a ground optical fiber grating demodulator; the ground optical fiber grating demodulator is connected with the computer system; and an output end of the computer system is connected with the underground alarm protective device. The roadway gas monitoring system based on the optical fiber grating sensing technology disclosed by the invention has the advantages as follows: monitored result is more accurate; signal transmission distance is far, capacity of resisting disturbance is strong; the grating optical fiber sensors work inactively and do not need to be supplied with power underground, and do not have an electric signal and an electronic apparatus, so that field security is ensured; a monitored picture is directly displayed in figure, writing, report form, and the like, so that results can be timely monitored, and warning and forecasting of the roadway gas concentration can be realized, and therefore, the roadway gas monitoring system is beneficial to guiding field security production work.

Description

Technical field [0001] The invention relates to a roadway gas monitoring system, in particular to a roadway gas monitoring system based on optical fiber grating sensing technology. Background technique [0002] In recent years, the coal mine gas monitoring system has developed rapidly and has become a key area of ​​coal mine safety such as computer, communication, and sensor technology, which has eliminated many hidden dangers for coal mine safety production. However, my country's coal mine monitoring technology, especially gas monitoring, still has not formed a relatively complete technical system. Coal mine gas accidents occur frequently, and the economic losses caused are difficult to estimate. At present, the monitoring system used in gas tunnels still mainly uses manual monitoring, using portable methane detection alarms or optical interference methane detectors and other detection equipment. The monitoring efficiency is low, the randomness is strong, and the accuracy and re...

AI Technical Summary

Problems solved by technology

However, my country's coal mine monitoring technology, especially gas monitoring, still has not formed a relatively complete technical system, and coal mine gas accidents occur frequently, and the economic losses caused are difficult to estimate

At present, the monitoring system used in gas roadways still mainly uses manual monitoring, using portable methane detection and alarm devices or optical interference methane detectors and other detection equipment, the monitoring efficiency is low, the randomness is strong, and the accuracy and real-time performance are greatly reduced.

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