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An ultraviolet pure rotational Raman temperature measurement lidar system

A technology of laser radar and Raman temperature measurement, which is applied in the direction of radio wave measurement system, thermometer, heat measurement, etc., can solve the problems of system instability, inability to measure atmospheric temperature reliably for a long time, technical complexity, etc., and achieve stable and reliable Effect

Active Publication Date: 2020-08-07
WUHAN UNIV
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Problems solved by technology

However, these two pure rotational Raman lidar technologies are complex, the system is unstable, and it is impossible to measure the atmospheric temperature reliably for a long time

Method used

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  • An ultraviolet pure rotational Raman temperature measurement lidar system
  • An ultraviolet pure rotational Raman temperature measurement lidar system
  • An ultraviolet pure rotational Raman temperature measurement lidar system

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing.

[0020] The key of the present invention is to use the triple frequency laser (355nm) of the ND:YAG solid-state laser implanted by the seed as the emission light, and adopt the dual-grating polychromator to simultaneously collect the pure rotational Raman spectrum of both sides of Stokes and anti-Stokes (frequency symmetry ) for atmospheric temperature measurements. Since the double-grating polychromator is also insensitive to the ambient temperature, the center wavelength and receiving bandwidth are very stable, and the laser in the ultraviolet 355nm band is used as the emitting light source, which can effectively reduce the influence of the solar background light on the echo signal, and realize the control of the atmospheric temperature. Observe all day.

[0021] The laser radar system of the present invention is composed of three parts, that is, a transmitting unit, an o...

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Abstract

The invention discloses an ultraviolet pure rotation Raman temperature measuring laser radar system. The laser radar system consists of a transmitting unit, an optical receiving unit, a double-grating polychromator unit, and a photoelectric conversion and control unit. The transmitting unit uses a seed-injected solid-state laser to output a 354.7nm ultraviolet laser with an extremely narrow linewidth and directs it to the zenith; the optical receiving unit and the double-grating polychromator unit are used to collect backscattered light from atmospheric substances, and can transmit light at 0.2 nm The spectral resolution extracts the pure rotational Raman spectrum in the scattering spectrum, and uses the change of the pure rotational Raman spectral line intensity with temperature to obtain the information of the atmospheric temperature. The photoelectric conversion and control unit ensures the orderly operation of the entire radar system. The ultraviolet pure rotation Raman laser radar of the present invention makes the radar work in the ultraviolet band, which can obviously reduce the background light of the sun, and can be used for all-day measurement of atmospheric temperature.

Description

technical field [0001] The invention relates to an ultraviolet pure rotation Raman lidar system for detecting atmospheric temperature. Background technique [0002] Atmospheric temperature is a very important parameter, which describes the heat balance structure of the atmosphere. Temperature is also an important parameter in many atmospheric models and is widely used in the study of atmospheric dynamics, climate change and weather processes. Accurate measurement of atmospheric temperature is of great significance, and structural changes in atmospheric temperature can help us understand phenomena such as climate change. [0003] Lidar is widely used in the remote sensing detection of the atmosphere, ocean, land and other targets because of its high spatio-temporal resolution, high detection sensitivity and continuous detection. It is especially suitable for the detection of atmospheric parameters. There are many methods for lidar to measure the temperature below the lower ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/95G01S7/481G01K11/32G01K11/3206G01K11/324
CPCG01K11/32G01S7/481G01S7/4818G01S17/95G01K11/324Y02A90/10
Inventor 余长明易帆张云鹏柳付超何裕金翁淼
Owner WUHAN UNIV
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