Portable Fourier transform infrared gas analyzer suitable for complex field environment

Abstract

The invention discloses a portable Fourier transform infrared gas analyzer suitable for a field complex environment. The analyzer comprises a light source assembly, an interface sealing ring assemblyI, a cable group I, an angle mirror type Michelson interferometer and light path assembly, a power panel, a cable group II, an electrical mainboard, an interface sealing ring assembly II, an interfacesealing ring assembly III, a gas chamber, a battery, a gas pump and an electromagnetic valve; the light source assembly comprises a collimating mirror, an infrared light source and a third plane mirror; and the angle mirror type Michelson interferometer and light path assembly comprises a light transmitting window piece, a first plane mirror, a second plane mirror, a laser detector, a beam splitter, a fourth plane mirror, a first sealing window piece, a second sealing window piece, an infrared detector, an ellipsoidal mirror, a parabolic mirror, a movable mirror, a fixed mirror and a laser device. The gas chamber comprises a third sealing window piece, a first concave mirror, a second concave mirror, a third concave mirror and a fourth sealing window piece. Technical indexes and environmental applicability of the analyzer are superior to those of corresponding foreign products, and the analyzer can be popularized and used in vast areas of China.

Description

technical field [0001] The invention relates to the field of gas analysis, in particular to a portable Fourier transform infrared gas analyzer suitable for complex outdoor environments. Background technique [0002] Fourier Transform Infrared (FTIR) gas analyzer is one of the most ideal methods for gas concentration detection at present. It has high sensitivity, accurate wave number, good repeatability, and a wide range of applications. Compared with other detection technologies, it is widely used in emergency monitoring of ambient air pollution because of its advantages of easy use, fast test, light weight and portability. [0003] At present, the use of Fourier transform infrared technology for field gas detection, most of them use vehicle-mounted laboratory Fourier transform infrared spectrometers, and use gas chamber sampling accessories in the sample compartment of the instrument for gas detection. [0004] The core of the Fourier transform infrared spectrometer is the...

AI Technical Summary

Problems solved by technology

[0006] my country has a vast territory, diverse terrain, and complex climate. Portable Fourier transform infrared gas analyzers have high requirements for working conditions, which cannot meet the application requirements in complex field environments.

[0007] The absorption caused by water vapor and carbon dioxide in the optical path environment of the gas analyzer greatly reduces the accuracy of the final collected spectral data

The use of nitrogen purging and post-software data processing can only overcome part of the adverse effects, but it does not fundamentally solve the problem

[0008] In addition, due to the monopoly of foreign brands, the gas analyzer is very expensive and cannot be popularized and used in most areas of our country.

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