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Ultraviolet pure rotational Raman temperature measurement laser radar system

A laser radar, Raman temperature measurement technology, used in radio wave measurement systems, thermometers, measurement of heat and other directions, can solve problems such as system instability, inability to measure atmospheric temperature reliably for a long time, and complex technology, and achieve stable and reliable. Effect

Active Publication Date: 2017-05-31
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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  • Ultraviolet pure rotational Raman temperature measurement laser radar system
  • Ultraviolet pure rotational Raman temperature measurement laser radar system
  • Ultraviolet pure rotational Raman temperature measurement laser radar 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 rotational Raman temperature measurement laser radar system. The laser radar system is composed by a launcher unit, an optical receiving and double grating polychromator unit, a photoelectric conversion and control unit. The launcher unit adopts a solid-state laser injected by seed to output an extremely narrow line width of 354.7 nm ultraviolet laser light and directs the ultraviolet laser light to the zenith. The optical receiving and double grating polychromator unit is used for collecting the back scattered light from the atmosphere, and extracting the pure rotational Raman spectrum from the scattered spectrum by using 0.2nm of the spectral resolution, then obtain the information of atmospheric temperature by using the different intensity of the pure rotational Raman spectrum with the temperature. The photoelectric conversion and control unit ensure an orderly operation of the whole radar system. In the ultraviolet pure rotational Raman temperature measurement laser radar system, the radar works in the ultraviolet band so that the solar background light can be significantly reduced, which can be used for the measurement of atmospheric temperature throughout the day.

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 Applications(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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