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Pulse infrared differential absorption laser radar system for detecting carbon dioxide concentration profile

A carbon dioxide, differential absorption technology, applied in radio wave measurement systems, measurement devices, electromagnetic wave re-radiation and other directions, to achieve the effect of easy promotion, high detection accuracy and high stability

Pending Publication Date: 2019-04-19
WUHAN UNIV
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Problems solved by technology

Most of the lidar systems currently developed are for CO 2 Column concentration (ie, average concentration) detection is a pre-research project for spaceborne applications, and generally lacks CO 2 Study on Detection of Profile Concentration (Concentration with Distance Distribution)

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  • Pulse infrared differential absorption laser radar system for detecting carbon dioxide concentration profile
  • Pulse infrared differential absorption laser radar system for detecting carbon dioxide concentration profile
  • Pulse infrared differential absorption laser radar system for detecting carbon dioxide concentration profile

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Embodiment Construction

[0017] The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.

[0018] In order to facilitate the understanding of the principle of the present invention, the classical inversion method of differential absorption lidar used in the present invention is firstly explained:

[0019] In the DIAL detection system, two detection laser beams with similar wavelengths are generally emitted, and the wavelength of one laser beam is at the absorption peak position of the detection gas to obtain the maximum absorption. The wavelength corresponding to this laser beam is called the on wavelength (denoted as λ on ); the other laser beam is located near the absorption valley of the detection gas, so that the gas absorbs the laser energy as little as possible, and the wavelength corresponding to this laser beam is called the off wavelength (denoted as λ off ).

[0020] The action mechanism adopted by the differential a...

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Abstract

The invention provides a pulse infrared differential absorption laser radar system for detecting a carbon dioxide concentration profile, which comprises a laser emitting subsystem, an optical receiving subsystem and a data acquisition processing subsystem, wherein the laser emitting system comprises a seed laser, an Nd: YAG laser, a dye laser, a first reflecting mirror, a first half-reflecting half lens, a second half-reflecting half lens, a frequency doubling crystal, a difference frequency crystal, a first spectroscope and a wavelength control unit. The system can not only detect column concentration of atmospheric CO2, but also can obtain CO2 concentration profile distribution on a vertical path, particularly atmospheric CO2 concentration information near a boundary layer, and has important significance for carbon cycle research. The system has the advantages of low technical requirements, high stability, high detection precision and easy popularization, and is an important means for achieving atmospheric CO2 concentration profile measurement.

Description

technical field [0001] The invention relates to an infrared differential differential absorption laser radar system for remotely sensing and detecting atmospheric carbon dioxide concentration profiles. Background technique [0002] Atmospheric carbon dioxide (CO 2 ) detection of differential absorption lidar is in a period of vigorous development, countries are competing to develop high-performance detection systems, and strive to achieve atmospheric CO 2 The accurate measurement of carbon sources and carbon sinks can be clarified, and the understanding of the carbon cycle can be deepened. CO 2 Detecting Differential Absorption LiDAR i.e. CO 2 -Differential Absorption Lidar, CO 2 -DIAL. Most of the lidar systems currently developed are for CO 2 Column concentration (ie, average concentration) detection is a pre-research project for spaceborne applications, and generally lacks CO 2 The study of the detection of profile concentrations (ie concentrations with a distance ...

Claims

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Application Information

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IPC IPC(8): G01S17/95
CPCG01S17/95Y02A90/10
Inventor 马昕龚威韩舸徐浩史天奇何斌王成义邱若楠
Owner WUHAN UNIV
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