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Compound-system Doppler anemometry laser radar

A technology of Doppler wind measurement and laser radar, which is applied in the field of atmospheric detection, can solve the problems of low detection accuracy, weak anti-background noise ability, and inability to realize shot noise detection, and achieve high detection accuracy and strong anti-background noise ability Effect

Active Publication Date: 2018-10-30
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0004] The traditional Doppler wind measurement lidar has weak anti-background noise ability at low altitude (the altitude is below 2Km), and it cannot realize the detection under the limit of shot noise, and the detection accuracy is low

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  • Compound-system Doppler anemometry laser radar

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0047] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0048] refer to figure 1 , the figure is a schematic structural diagram of a complex Doppler wind-measuring lidar provided by an embodiment of the present invention. The lidar includes: a coherent detection module...

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Abstract

The invention discloses a compound-system Doppler anemometry laser radar. The laser radar is the compound-system Doppler anemometry laser radar in which a coherent detection method and a direct detection method are combined. The laser radar can be used for the fields of laser detection, atmosphere detection and photoelectric detection, and the technology is different from the stripe imaging technology based on a Fiso interferometer and adopted by ALADIN at low altitude and the double-edge technology based on a Fabry-Perot etalon and adopted at high altitude. According to the technical scheme,a coherent detection method is adopted at the low altitude and the direct detection method is adopted at the high altitude for measuring a wind field, wind field detection coverage at the height of 0-30 km, the advantage of high background noise resistance of the coherent detection technology can be fully exerted in low-altitude detection, detection under the shot noise extreme can be achieved, and the advantage of higher detection precision is achieved.

Description

technical field [0001] The invention relates to the technical field of atmospheric detection, in particular to a compound system Doppler wind measuring laser radar. Background technique [0002] Doppler wind lidar, with its high resolution, high precision, large detection range, and ability to provide three-dimensional wind field information, has important applications in climate research and weather forecasting, and has attracted the attention of many countries in the world. A lot of manpower and material resources are needed for research. According to different Doppler frequency detection methods, Doppler wind lidar technology can be divided into coherent detection technology and non-coherent detection (direct detection) technology. The coherent detection technology uses the backscattering signal of the aerosol and the beat frequency of the emitted laser local oscillator to invert the Doppler frequency, which is suitable for detecting the atmospheric wind field with a sma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/95
CPCG01S17/95Y02A90/10
Inventor 韩於利王元祖孙东松张楠楠郑俊储嘉齐刘恒嘉
Owner UNIV OF SCI & TECH OF CHINA
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