Dual-optical-path Fabry-Perot interferometer based CH4 column concentration remote measuring device

A technology of telemetry devices and interferometers, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of lack of telemetry means on the platform, achieve the effects of reducing device volume and cost, ensuring synchronization, and improving signal-to-noise ratio

Inactive Publication Date: 2017-10-27
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The object of the present invention is to provide a kind of CH based on double optical path Fabry-Perot interferometer 4 Column Concentration Telemetry Device to Address State-of-the-Art Atmospheric CH 4 The problem of the lack of telemetry means on the gas foundation and platform

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  • Dual-optical-path Fabry-Perot interferometer based CH4 column concentration remote measuring device
  • Dual-optical-path Fabry-Perot interferometer based CH4 column concentration remote measuring device
  • Dual-optical-path Fabry-Perot interferometer based CH4 column concentration remote measuring device

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Embodiment Construction

[0025] like figure 1 As shown, the CH based on the dual optical path Fabry-Perot interferometer 4 The column concentration telemetry device includes a dual optical path measuring device placed on the two-dimensional platform, a telescope, and an industrial computer 13 for controlling the two-dimensional platform and the dual optical path measuring device. The industrial computer 13 controls the movement of the two-dimensional platform so that sunlight can travel along the telescope. The direction of the optical axis is incident to the telescope, and the dual optical path measuring device receives sunlight through the telescope, where:

[0026] The dual optical path measurement device includes a first off-axis parabolic mirror 1, a chopper 2, a second off-axis parabolic mirror 3, a pre-filter 4, a beam splitter 5, a Fabry-Perot interferometer 6, a third off-axis On-axis parabolic reflector 7, first InGaAs detector 8, fourth off-axis parabolic reflector 16, second InGaAs detect...

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Abstract

The invention discloses a dual-optical-path Fabry-Perot interferometer based CH4 column concentration remote measuring device. The dual-optical-path Fabry-Perot interferometer based CH4 column concentration remote measuring device comprises a dual optical path measuring device arranged on a two-dimensional platform, a telescope, and an industrial personal computer used for controlling the two-dimensional platform and the dual optical path measuring device, the dual optical path measuring device comprises a first off-axis parabolic mirror, a chopper, a second off-axis parabolic mirror, a prefilter, a spectroscope, a Fabry-Perot interferometer, a third off-axis parabolic mirror, a first InGaAs detector, a fourth off-axis parabolic mirror, a second InGaAs detector, a first lock-in amplifier, and a second lock-in amplifier. Through the dual-optical-path Fabry-Perot interferometer based CH4 column concentration remote measuring device, the concentration distribution of CH4 in the atmosphere and an emission source is remotely measured on a foundation and a vehicle-mounted or airborne platform.

Description

technical field [0001] The invention relates to the field of optical measurement devices, in particular to a CH4 column concentration remote measurement device based on a double optical path Fabry-Perot interferometer. Background technique [0002] CH 4 It is an important greenhouse gas and plays an important role in the greenhouse effect of global warming. CH 4 The gas monitoring technology has gone through the initial on-site sampling, laboratory analysis, on-site on-line monitoring and the development of new optical telemetry technology in recent years. Optical telemetry technology can realize on-site non-contact, real-time online continuous measurement, and telemetry can better reflect the CH in the entire atmosphere. 4 concentration distribution and changes. [0003] Currently used for CH 4 The main methods of gas telemetry are: laser radar (LIDAR), Fourier spectrometer (FTS), etc., and are used to measure CH 4 The equipment distributed globally is mainly satellit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/45
CPCG01N21/45G01N2021/451
Inventor 徐晋李昂谢品华王汝雯刘文清
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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