Spectrometer air chamber switching apparatus used in on-line spectrometric analysis of gas

Abstract

The invention discloses an spectrometer air chamber switching apparatus used in an on-line spectrometric analysis of gas, which comprises a measuring air chamber, a sample air chamber, a linear bearing, a vertical movement mechanism and a spacing sensor; the measuring air chamber and the sample air chamber are fixedly arranged on the base of the air chamber, the base of the air chamber is fixedlyconnected with a connection installing plate by a fastening screw; the linear bearing comprises a guide rod and a bearing base, the guide rod is fixedly arranged on the floor, the bearing base is fixedly arranged on the connection installing plate. The measuring gas chamber is placed in an optical path when a normal measurement is performed, the switching apparatus places the corresponding standard sample gas chamber in the optical path under the control of a computer when the background needs to be scanned again. The switching apparatus places the measuring air chamber into the optical path again after the background spectrum is completed scanned, the spectrometer is recovered to a normal spectrum scanning and a spectrometric analysis. The method omits the time of cleaning the air chamber when the background is scanned, which substantially reduces the missed measurement data during the spectrum on-line analytical process, and avoids the system analysis error introduced by residual gas due to the unclean gas chamber.

Description

technical field [0001] The invention relates to the field of on-line spectrum analysis of gas composition and concentration, in particular to the on-line spectrum analysis of gas composition and concentration of a single optical path spectrometer. Background technique [0002] The spectrometer can realize the quantitative analysis of almost all gases, and the spectrometer does not consume any materials and does not bring any pollution during the working process, so it is called a "green" instrument. With the development of computer technology and data analysis and processing technology, in recent years, spectrometers have begun to be used in the field of online analysis of gas composition and concentration. However, due to the characteristic changes of the light source, detector and other devices during the long-term working process, the spectrum will drift or even be distorted during the long-term online analysis process. In order to reduce the impact of certain device cha...

AI Technical Summary

Problems solved by technology

The presence of methane residual gas when scanning the background spectrum makes the concentration of methane in the subsequent analysis results smaller

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