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Real-time online observation device for carbonyl sulfide (COS) trace gas

A trace gas and observation device technology, which is applied in measuring devices, color/spectral characteristic measurement, material analysis through optical means, etc., can solve the problems of cumbersome detection, low accuracy of monitoring hourly and daily scale COS flux changes, and inability to real-time Online observation and other issues, to achieve the effect of low detection limit and high detection accuracy

Pending Publication Date: 2022-01-21
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The COS flux in the initial ecosystem was mainly sampled by volumetric flasks and monitored by gas chromatography-mass spectrometry (GC-MS). Cannot observe online in real time

Method used

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  • Real-time online observation device for carbonyl sulfide (COS) trace gas
  • Real-time online observation device for carbonyl sulfide (COS) trace gas

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] like figure 1 As shown, a carbonyl sulfide (COS) trace gas real-time online observation device includes an optical path measurement unit, a laser control and signal processing unit, a gas path and an air pressure control unit, wherein:

[0023] The optical path measurement unit includes an infrared laser 4, a collimator lens 5, reflectors 6a, 6b, a gas absorption cell 7, and a photoelectric detector 8, and the optical path measurement unit is installed on the base plate at a fixed position and angle. Wherein the collimating lens 5 is installed on the shell of the infrared laser 4, facing the light output surface of the infrared laser. The reflector 6a is facing the output direction of the collimated light, and is used to deflect the output infrared collimated light. The reflector 6b is placed at the horizontal position of 6a and arranged at a ce...

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Abstract

The invention discloses a real-time online observation device for carbonyl sulfide (COS) trace gas. The real-time online observation device comprises a light path measurement unit, a laser control and signal processing unit and a gas path and gas pressure control unit. The laser control and signal processing unit and the light path measurement unit are matched with each other to realize concentration analysis of carbonyl sulfide (COS) trace gas in to-be-measured gas, and the gas path and gas pressure control unit realizes replacement of the to-be-measured gas and control of low pressure stability. According to the invention, real-time online detection of carbonyl sulfide (COS) trace gas can be realized, and meanwhile, low-pressure control and the long-range absorption cell are utilized, so that the detection precision is higher, and the detection lower limit is lower. According to the invention, all-weather automatic observation of the carbonyl sulfide (COS) trace gas can be realized.

Description

technical field [0001] The invention relates to the field of optical detection devices for trace gas, in particular to a real-time on-line observation device for carbonyl sulfide (COS) trace gas. Background technique [0002] Ecosystem photosynthesis is the most important key process in the global carbon cycle, and its characteristic index ecosystem gross primary productivity (GPP) is the largest single flux of terrestrial ecosystem carbon cycle. However, direct monitoring of GPP at regional and global scales is difficult to achieve with current technologies. Atmospheric CO 2 The technique of indirectly estimating GPP from observational data is difficult to accurately distinguish between plant photosynthesis and respiration CO 2 Flux, the uncertainty is large. With the development of the latest scientific and technological means, carbonyl sulfide (COS) flux observations have been adopted internationally as a means of monitoring CO in the total photosynthesis of ecosystem ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/39G01N21/03
CPCG01N21/39G01N21/03
Inventor 汪磊王震宇花昌义王明龙张龙王绍强
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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