Doppler laser radar wind measurement method and device

A Doppler laser and radar technology, applied in the field of Doppler lidar wind measurement methods and devices, can solve the problems of low optical power, high price, and inability to change, and achieve flexible spectrum data analysis options and rich expansion methods , The effect of reducing hardware costs

Active Publication Date: 2017-11-24
南京牧镭激光科技股份有限公司
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Problems solved by technology

It is generally required that the spectral linewidth of the seed laser is narrow (generally <10kHz), low phase noise, and good frequency stability. Currently, the high-performance seed lasers on the market are generally expensive and have low optical power. They are used as acousto-optic modulation devices for frequency shifters. And RF drive devices are also expensiv

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  • Doppler laser radar wind measurement method and device
  • Doppler laser radar wind measurement method and device

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Embodiment Construction

[0012] Attached below figure 2 The technical scheme of the present invention is further described.

[0013] figure 2 It is a principle diagram of Doppler wind measuring laser radar according to an embodiment of the present invention. The Doppler wind lidar mainly includes a laser light source module, a photoelectric detector 10 , an optical phase-locked loop feedback circuit module 11 , a laser beam transceiver module 9 , a photoelectric balance detector 12 and a data acquisition and processing module 13 . The laser light source module is used to provide the laser source required by the radar, including the first laser 1, the second laser 2, the first beam splitter 3, the second beam splitter 4, the first amplifier 5, the second amplifier 6, the first combiner beam combiner 8 and second beam combiner 7. Wherein, the first laser 1 is split by the first beam splitter 3 , and the split first beam is amplified by the first amplifier 5 and then enters the first beam combiner 8...

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Abstract

The invention discloses a Doppler laser radar wind measurement method and device. The method comprises the steps that beam splitting and power amplification are performed on a first laser source and a second laser source and then coherent beam combining is performed on the first laser source and the second laser source under the synchronous phase-locked state by using an optical phase-locked loop feedback circuit module; the combined laser beams are transmitted to the atmosphere and then echo optical signals are collected; heterodyne beat detection is performed on the collected echo optical signals and the oscillating optical signals of the device; and wind speed inversion analysis is performed on the detected spectrum data. The frequency shift effect is realized by adjusting the frequency difference between the first and second laser sources, and the acousto-optic frequency shift device in the prior art is replaced so that the more abundant extension modes and the more flexible spectrum data analysis selection can be provided for the laser radar system.

Description

technical field [0001] The invention relates to the technical field of laser radar, in particular to a Doppler laser radar wind measurement method and device. Background technique [0002] Doppler wind lidar technology is a high-precision atmospheric wind field information telemetry technology. The laser radar system emits a high-spectrum-purity laser beam into the detection airspace, and the aerosol particles in the atmosphere interact elastically with the laser beam. After the backscattered echo optical signal is effectively received by the radar signal transceiver system, it passes through the high-sensitivity optical frequency heterodyne The detection technology can accurately invert the measured Doppler spectrum information to obtain wind field information such as wind speed and wind direction. This technology has been widely used in the fields of clean wind power energy development, meteorological science, wind shear warning in the airspace of civil aviation airports,...

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Application Information

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IPC IPC(8): G01S17/95G01P5/26G01P13/02
CPCG01P5/26G01P13/02G01S17/95Y02A90/10
Inventor 周军钱勇朱海龙张恩惠高炎锟陈帅
Owner 南京牧镭激光科技股份有限公司
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