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Ultraviolet quasi-single pure-rotation Raman spectrum extraction-based all-day temperature measurement laser radar

A lidar, pure rotation technology, applied in the direction of thermometers, thermometers, and heat measurement with physical/chemical changes, to achieve the effect of improving signal strength, improving system signal-to-noise ratio, and reducing background noise

Active Publication Date: 2017-08-08
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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[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 used to illustrate and explain the present invention, and are not intended to limit this invention.

[0036] Such as figure 1 As shown, an all-time 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 las...

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Abstract

The present invention discloses an ultraviolet quasi-single pure-rotation Raman spectrum extraction-based all-day temperature measurement laser radar. The laser radar comprises a laser emitting unit, an optical receiving unit and a signal acquisition and control unit. The laser emitting unit emits the ultraviolet laser of 354. 82 nm in wavelength and the ultraviolet laser is adopted as a detection light source. The laser emitting unit sends a pulse laser beam to the atmosphere. The pulse laser beam and atmospheric particles interact to generate a series of discrete spectrum line scattering signals. The optical receiving unit receives the scattering signals through a telescope and then respectively and simultaneously extracts elastic scattering signals and quasi-single-branched anti-stoke pure-rotation Raman spectral line signals through three channels. The signal acquisition and control unit realizes the real-time acquisition and the inversion of signals, so that the normal and orderly operation of the entire laser radar system is ensured. According to the technical scheme of the invention, the signal-to-noise ratio of the system is enhanced, and the light-receiving path is optimized. The system stability is improved. The all-day detection of the atmospheric temperature, the aerosol space distribution and time evolution parameters is implemented.

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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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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