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CO2 and N2O stable isotope simultaneous detection device and method based on double-beam cavity enhanced spectrum technology

A stable isotope and enhanced spectrum technology, which is applied in the simultaneous detection device of N2O stable isotope and CO2 field, can solve the problems of lack of spectral measurement technology and low concentration of heavy isotope molecules, so as to reduce device cost, improve efficiency, and facilitate miniaturization and integration the effect of

Pending Publication Date: 2020-08-21
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Due to the low concentration of heavy isotope molecules, especially the real-time analysis of multi-component and multi-isotope abundance, its spectroscopic measurement technology is still very lacking

Method used

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  • CO2 and N2O stable isotope simultaneous detection device and method based on double-beam cavity enhanced spectrum technology
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  • CO2 and N2O stable isotope simultaneous detection device and method based on double-beam cavity enhanced spectrum technology

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing:

[0023] Such as figure 1 The shown CO based on dual-beam cavity-enhanced spectroscopy technique 2 , N 2 O Stable isotope simultaneous detection device, including signal generator 5, QCL laser device 1, QCL laser device 2, QCL laser controller 1, QCL laser controller 2 3, plane mirror assembly 1, plane mirror assembly 2, integral Cavity 7, focusing lens 8, MCT detector 9 and signal processing system 6. The output end of the signal generator 5 is respectively connected to the input end of the QCL laser controller-1 and the input end of the QCL laser controller two 3; the output end of the QCL laser controller-1 is connected to the input end of the QCL laser controller-2 The output terminal of the QCL laser controller two 3 is connected to the input end of the QCL laser two 4; the plane mirror assembly one is arranged on the front optical path of the QCL laser one 2; the pla...

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Abstract

The invention relates to a CO2 and N2O stable isotope simultaneous detection device and method based on a double-beam cavity enhanced spectrum technology. The device comprises a signal generator, a QCL laser I, a QCL laser II, a QCL laser controller I, a QCL laser controller II, a plane mirror assembly I, a plane mirror assembly II, an integral cavity, a focusing lens, an MCT detector and a signalprocessing system. According to the invention, a stable and efficient double-beam cavity enhanced optical path system is realized, the two QCL lasers working at room temperature are combined, the miniaturized atmospheric CO2 and N2O multi-component stable isotope dynamic efficient detection device is constructed; according to the double-beam cavity enhanced spectrum structure, a beam-combining optical coupling element does not need to be added, power fluctuation and loss caused by a traditional coupling optical element are avoided, the hardware cost of the system is reduced, integration of the detection device is facilitated, and in-situ real-time detection of the isotope abundance of the multi-component gas can be achieved.

Description

technical field [0001] The invention relates to the technical field of gas detection, in particular to a CO 2 , N 2 O stable isotope simultaneous detection device and method. Background technique [0002] Multi-component trace gas detection and isotope abundance analysis play an increasingly important role in human production and life. In the atmosphere carbon dioxide (CO 2 ) and nitrogen oxides (N 2 O) and other trace greenhouse gases, changes in these trace gases will lead to a series of pollution problems such as "greenhouse effect", "acid rain", "photochemical smog" and "smog". Due to the use of chemical fertilizers (especially nitrogenous fertilizers) in agricultural production, a large amount of N 2 O. Studies have shown that N 2 O is a very powerful greenhouse gas, and N in the atmosphere 2 Although the content of O is only about CO 2 9%, but its greenhouse effect is CO 2 310 times of that, has caused serious ecological problems. Real-time monitoring of gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/39G01N21/01
CPCG01N21/39G01N21/01G01N2021/0112
Inventor 夏滑余润磬孙鹏帅张志荣庞涛吴边李哲张乐文杨曦
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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