Mining multifunctional sensing monitoring system based on fiber bragg grating

Abstract

The invention discloses a mining multifunctional sensing monitoring system based on a fiber bragg grating, and belongs to downhole safety monitoring systems. According to the system, a light source module emits light, an ASE broadband light source is selected, and the light source module is connected with the input end of a light amplification module, so that light power is enhanced. The output end of the light amplification module is connected with the input end of a photoswitch array, the output end of the photoswitch array is connected with the input end of a working face monitoring module and the input end of a roadway monitoring module, and therefore different monitoring channels can be switched. The working face monitoring module can monitor the to-be-detected pressure, temperature and dangerous gas of a working face. The roadway monitoring module can read the to-be-detected pressure and temperature of a roadway. Optical signals can be read. A demodulation module can analyze and process monitored information, and a system monitoring task is completed. A light transmission module can transmit the optical signals of the system. Temperature compensating optical fibers are adopted in the monitoring system, so that monitoring precision is greatly improved. A multiplex unit is adopted, so that the utilization rate of the system is greatly improved. The function of the system is enhanced based on the gas detecting technology.

Description

technical field [0001] The invention relates to an underground safety monitoring system, in particular to a mine-used multifunctional sensor monitoring system capable of real-time detection of underground temperature, pressure and dangerous gas simultaneously based on optical fiber gratings. Background technique [0002] In recent years, with the continuous improvement of mining technology and the application of various sensing technologies in the field of underground safety monitoring, the safety index of underground mines has been significantly improved, and the safety production status of the industry has been greatly improved. However, traditional sensors rely on electrical signal transmission to realize safety monitoring in mines. They have weak anti-electromagnetic interference and poor reliability. Especially in the harsh environment of mines, it is difficult to achieve the expected monitoring effect. Moreover, the traditional monitoring system is bulky, and it is di...

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Problems solved by technology

[0006] The invention can solve the problems of weak anti-electromagnetic interference ability, poor reliability, low precision, low reuse rate, high cost, and poor information processing ability of the existing mining monitoring system, and meets the needs of modern coal mine safety production for the new generation monitoring system. stringent requirements

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