Dual-beam laser radar wind field detection device and method

A technology of laser radar and detection device, which is used in measurement devices, radio wave measurement systems, fluid velocity measurement and other directions, and can solve the problems of high requirements for laser frequency stability, high cost, and high requirements for laser coherence.

Pending Publication Date: 2021-04-23
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

Doppler coherent detection uses the echo signal and the local oscillator laser for optical mixing. The frequency of the difference frequency signal minus the initial frequency offset is the Doppler frequency shift caused by the moving particles. The coherence of the coherent detection of the laser The requirements are high, so the processing of optical devic

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  • Dual-beam laser radar wind field detection device and method

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Embodiment Construction

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0036] Such as figure 1 As shown, a dual-beam laser radar wind field detection device of the present invention includes: a first laser transmitting and receiving mechanism, a second laser transmitting and receiving mechanism, a master control unit, an acquisition processing unit and an operation display unit; the first laser transmitting and receiving mechanism 1. The structure of the second laser transmitting and receiving mechanism is the same, i...

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Abstract

The invention provides a dual-beam laser radar wind field detection device and method. The device comprises a first laser transmitting and receiving mechanism, a second laser transmitting and receiving mechanism, a master control unit, a collecting and processing unit and an operation display unit. The first laser emitting and receiving mechanism and the second laser emitting and receiving mechanism are installed on the same plane, and emitted laser beams are also on the same plane. The distance between laser emitting positions of the first and second laser emitting and receiving mechanisms is a, and an included angle between optical axes of laser beams emitted by the first and second laser emitting and receiving mechanisms is theta; the master control unit controls lasers and detectors of the two laser transmitting and receiving mechanisms and the collecting and processing unit to act according to the time sequence; and the collecting and processing unit is responsible for collecting and processing detector signals of the two laser transmitting and receiving mechanisms, and obtaining the direction and speed of the wind field according to the collected laser back scattering signal amplitude and the emitted laser energy value based on similarity calculation .

Description

technical field [0001] The invention relates to a dual-beam laser radar wind field detection device and method, belonging to the field of wind field detection. Background technique [0002] Atmospheric wind field is an important atmospheric physical parameter. Accurate observation of atmospheric wind field is of great significance to air pollution prevention and control, improving aerospace safety, military environment forecasting, improving climate research models, and improving the accuracy of long-term weather forecasts. As an active atmospheric remote sensing instrument, wind lidar has the advantages of high wind field measurement accuracy, high temporal and spatial resolution, and is not affected by ground clutter. It is very suitable for fast and accurate wind field measurement. [0003] Doppler wind detection lidar realizes wind field detection by measuring the Doppler frequency shift caused by atmospheric molecules and aerosol particles moving with the wind field to ...

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Application Information

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IPC IPC(8): G01S17/95G01P5/26
CPCG01P5/26G01S17/95Y02A90/10
Inventor 张战盈徐赤东徐青山纪玉峰伯广宇余东升方蔚恺杨喆蔡熠陈海燕李艳蕾
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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