Gas leakage monitoring system

Abstract

The invention, which belongs to the field of gas leakage monitoring, discloses a gas leakage monitoring system comprising a laser, an optical fiber sensor assembly and a photoelectric conversion module which are connected in sequence, an electric signal acquisition module, an electric signal processing module and an alarm signal output module that are connected in sequence. The electric signal acquisition module is connected with the photoelectric conversion module, and the electric signal processing module is connected with the laser; the laser is used for emitting laser to an optical fiber sensor; the optical fiber sensor is used for enabling the laser to generate a first interference light wave signal and enabling the laser to generate a second interference light wave signal by utilizing ultrasonic waves generated by gas leakage; the photoelectric conversion module is used for converting the first interference light wave signal and the second interference light wave signal into a first electric signal and a second electric signal which are transmitted to the electric signal processing module through the electric signal acquisition module; and the electric signal processing module is used for judging whether gas leakage occurs in the to-be-monitored area and outputting a judgment result through the alarm signal output module.

Description

technical field [0001] The invention relates to the field of gas leakage monitoring, in particular to a gas leakage monitoring system. Background technique [0002] For pressure gas pipelines and containers on the ground, such as pipelines and containers in natural gas pipeline stations, shale gas production well platforms, etc., they are easily affected by factors such as welding construction quality, corrosion, and pipe fitting quality. Natural gas) leakage, which will not only lead to economic losses, but also prone to safety accidents. Therefore, it is necessary to timely and effectively monitor whether gas leakage occurs in the above-mentioned areas. [0003] In the prior art, flow pressure gauges are generally used, and methods such as pressure gradient method and cross-correlation method are used to judge whether gas leakage occurs in the pressure gas pipelines and containers in the area to be monitored. [0004] The inventor found that the prior art has at least th...

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Problems solved by technology

[0005] The existing technology can only monitor when a large amount of gas leakage occurs in the pressure gas pipelines and containers in the area to be monitored, which has the characteristics of high false alarm rate

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