All-day temperature measurement lidar based on ultraviolet quasi-single pure rotational Raman spectrum extraction

A technology of laser radar and pure rotation, which is applied in the direction of physical/chemical change thermometers, thermometers, and heat measurement, etc., to reduce background noise, improve system signal-to-noise ratio, and expand the working environment.

Active Publication Date: 2018-04-20
WUHAN UNIV
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Problems solved by technology

[0010] In order to solve the limitations of the existing pure rotational Raman temperature measurement laser radar in all-day atmospheric remote sensing detection, the present invention provides an all-time temperature measurement laser based on the extraction of ultraviolet quasi-single pure rotational Raman spectrum radar

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  • All-day temperature measurement lidar based on ultraviolet quasi-single pure rotational Raman spectrum extraction
  • All-day temperature measurement lidar based on ultraviolet quasi-single pure rotational Raman spectrum extraction
  • All-day temperature measurement lidar based on ultraviolet quasi-single pure rotational Raman spectrum extraction

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[0035] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only for illustration and explanation of the present invention, and are not intended to limit this invention.

[0036] like figure 1 As shown, an all-day temperature measurement lidar based on ultraviolet quasi-single pure rotational Raman spectrum extraction is composed of a laser emitting unit 1, an optical receiving unit 2 and a signal acquisition and control unit 3;

[0037]The laser emitting unit 1 comprises a Nd:YAG laser 101 (Spectra-Physics, model Pro-270-355), a laser beam expander 102, a first emission light guide mirror 103, a second emission light guide arranged in sequence along the exit light path direction. Mirror 104, the optical axis of Nd:YAG la...

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Abstract

The invention discloses an all-day temperature measuring laser radar based on ultraviolet quasi-single pure rotation Raman spectrum extraction, which is composed of a laser emitting unit, an optical receiving unit, and a signal acquisition and control unit. The laser emitting unit uses a 354.82nm ultraviolet laser as the detection light source to emit a pulsed laser beam to the atmosphere; the pulsed laser beam interacts with atmospheric particles to generate a series of discrete spectral line scattering signals; the optical receiving unit receives the scattered signals through a telescope and uses three channels to simultaneously Extract elastic scattering signals and quasi-single anti-Stokes pure rotational Raman spectral line signals; the signal acquisition and control unit realizes real-time acquisition and inversion of signals and ensures the normal and orderly operation of the entire laser radar system. The invention enhances the signal-to-noise ratio of the system, optimizes the receiving optical path, improves the stability of the system, and realizes the detection of spatial distribution and time evolution parameters such as atmospheric temperature and aerosol throughout the day.

Description

technical field [0001] The invention belongs to the technical field of laser atmospheric remote sensing, and in particular relates to an all-day temperature measuring laser radar based on ultraviolet quasi-single pure rotational Raman spectrum extraction. Background technique [0002] Atmospheric temperature, as one of the basic meteorological parameters, plays an important role in the study of atmospheric physical phenomena, physical mechanisms and evolution laws. At the same time, the atmospheric temperature throughout the day, combined with the spatial distribution and temporal evolution parameters of aerosols, is helpful for studying processes such as cloud precipitation, atmospheric radiation, and atmospheric chemistry. Compared with traditional temperature measurement equipment such as radiosondes, lidar has the advantages of high temporal and spatial resolution, large detection range, and high detection accuracy. At the same time, it can realize continuous and automat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/95G01S7/481G01K11/32G01K11/324
CPCG01K11/32G01S7/481G01S7/4818G01S17/95G01K11/324Y02A90/10
Inventor 易帆潘向亮柳付超张云鹏余长明翁淼易洋殷振平闫燕莺
Owner WUHAN UNIV
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