Fourier infrared gas analysis method and system

Abstract

The invention provides a Fourier infrared gas analysis method and system. The method comprises the following steps: monitoring humidity data in a to-be-analyzed gas field environment in real time; the sampling frequency range of the infrared sensor is adjusted in real time, and the sampling frequency range, corresponding to the humidity data, of the infrared sensor is obtained; adjusting the sampling frequency of the outer sensor in real time within the sampling frequency range of the infrared sensor corresponding to the humidity data; acquiring an infrared sensor sampling frequency matched with the humidity in the current on-site environment of the gas to be analyzed; the method comprises the following steps: carrying out gas sampling in a sampling frequency range of an infrared sensor, extracting an output signal corresponding to an output fixed frequency of the infrared sensor, carrying out Fourier transform processing on the output signal corresponding to the output fixed frequency, and carrying out reprocessing in combination with a mathematical model optical algorithm of a partial least squares method to obtain an output signal corresponding to the output fixed frequency; and finally, acquiring a gas concentration value corresponding to the output signal. The system comprises modules corresponding to the steps of the method.

Description

technical field [0001] The invention provides a Fourier infrared gas analysis method and system, and belongs to the technical field of gas detection. Background technique [0002] The portable Fourier transform infrared gas analyzer forms a one-to-many correspondence with the on-site working conditions. How to adapt one analyzer to the on-site test work under different working conditions is the difficulty of how to achieve accurate measurement for different working conditions, which requires different working conditions. Specialized stoichiometric methods for working conditions and environments, such as: high humidity and low sulfur, ammonia escape, ultra-high humidity (waste incineration) are not suitable for applications, and the existing portable Fourier infrared gas analyzers cannot give accurate quantitative Analyze the results. SUMMARY OF THE INVENTION [0003] The invention provides a Fourier infrared gas analysis method and system, which is used to solve the probl...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a Fourier transform infrared gas analysis method and system, which is used to solve the problem that the gas analysis instruments and analysis methods in the prior art are faced with gas analysis occasions with relatively high humidity, and the humidity is easy to affect the gas concentration. The detection has an impact, which leads to the problem that the accuracy of gas concentration detection is reduced:

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