Seabed dissolved CO2 gas detection method and system based on photonic crystal fiber

Abstract

The invention discloses a seabed dissolved CO2 gas detection method and system based on a photonic crystal fiber. The method comprises the steps of (1) separating gas in seawater from the seawater, (2) judging the type and concentration of gas to be detected, and (3) obtaining a pure useful signal in direct proportion to the CO2 concentration of detected gas to characterize CO2 concentration information. The system comprises a sampling device, a laser, a beam splitter, a measurement light path and a reference light path, the sampling device is connected with the measurement light path, the laser is connected with a laser driver, the beam splitter is arranged at a light outlet end of the laser, output light of the beam splitter is connected with the measurement light path and the referencelight path through a single-mode optical fiber. By monitoring the content of CO2 in surrounding seawater in real time, that the CO2 leakage at a seabed can be immediately detected is ensured, and theproblem that the separation and measurement precision of CO2 dissolved in the seawater cannot meet the requirements is solved.

Description

technical field [0001] The invention relates to a method for dissolving CO in the seabed 2 Gas detection method, belonging to seabed dissolved CO 2 detection technology field. Background technique [0002] In recent years, due to the continuous advancement of the industrialization process, a large amount of fossil fuels have been used, causing the content of carbon dioxide in the atmosphere to rise sharply, leading to the intensification of the greenhouse effect, which has had a profound impact on the ecological environment and people's living environment. For a long time, about 50% of the world's carbon dioxide exists in the ocean. The ocean, which accounts for more than two-thirds of the earth's surface area, has become an important part of the carbon cycle between the land and the ocean, maintaining the earth's carbon balance. aspect plays an indispensable role. However, due to the rapid growth of carbon dioxide in recent years, the ocean cannot be converted in time, a...

AI Technical Summary

Problems solved by technology

This approach has some disadvantages, that is, the gas only diffuses through one end of the photonic crystal to fill the entire photonic crystal, which will cause the gas to fill the core area at a slower rate, which will slow down the response speed of the instrument.

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