An optical fiber distributed multi-point online gas monitoring system and its host

Abstract

The invention discloses an optical fiber distribution type multi-point online gas monitoring system and a main engine of the optical fiber distribution type multi-point online gas monitoring system. The optical fiber distribution type multi-point online gas monitoring system comprises the main engine and a monitoring probe distributed on each monitoring point, wherein the main engine is internally provided with a laser device; an output end of the laser device is connected to an input end of an output optical switch; the output end of the output optical switch is connected to each corresponding monitoring probe through an input optical fiber; each monitoring probe is connected to the corresponding input end of an input optical switch arranged in the main engine by an output optical fiber; the output end of the input optical switch is connected with an infrared photoelectric detector; the main engine is internally provided with a control module for controlling the output optical switch and the input optical switch to strobe and set a corresponding light path of each monitoring probe. According to the optical fiber distribution type multi-point online gas monitoring system and the main engine of the optical fiber distribution type multi-point online gas monitoring system, the main engine adopts the optical switches to realize time sharing multiplex of laser; under the condition of the laser devices with the same power, an optical fiber sensor can be distributed further; furthermore, only a single infrared photoelectric sensor needs to be arranged behind the output optical switch, so that the cost is reduced.

Description

technical field [0001] The utility model relates to an optical fiber distributed multi-point online gas monitoring system and a host computer thereof. Background technique [0002] Methane gas prevention and control is the top priority in the process of coal mine safety production. Traditionally, the method of pumping first and then mining is the guarantee strategy to prevent gas accidents and improve the safety of coal mine production operations. In addition, the extracted harmful gas can be used for power generation, which will bring great economic benefits to coal mines. [0003] However, during the gas extraction process, real-time online monitoring of the gas concentration is required. At present, many domestic mines have established methane concentration monitoring systems, which are basically branched tree network structures. The main station of the control center is set up in the coal mine, and multiple measurement and control sub-stations are set up underground. ...

AI Technical Summary

Problems solved by technology

[0010] The purpose of this utility model is to provide an optical fiber distributed multi-point online gas monitoring system to solve the problems of short monitoring distance and complex control of the existing monitoring system, and at the same time provide a host of an optical fiber distributed multi-point online gas monitoring system

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