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Turbulence parameter inversion method based on wind speed data of laser radar

A technology of lidar and wind speed data, applied in the field of turbulence detection, can solve the problems of increased dissipation rate measurement error, radial wind speed measurement error noise term calculation error, etc., so as to reduce measurement error, reduce speed measurement error, and avoid calculation effect of error

Active Publication Date: 2019-05-28
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

However, due to the continuous conical scanning method and the Von Karman model in the atmospheric turbulence theory and direct fitting, there are speed measurement errors in the radial wind speed and calculation errors in the noise term, resulting in an increase in the measurement error of the dissipation rate

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  • Turbulence parameter inversion method based on wind speed data of laser radar
  • Turbulence parameter inversion method based on wind speed data of laser radar
  • Turbulence parameter inversion method based on wind speed data of laser radar

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[0051] 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 some 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.

[0052] An embodiment of the present invention provides a turbulence parameter inversion method based on lidar wind speed data, such as figure 1 As shown, it mainly includes the following steps:

[0053] Step 1. Control the lidar to obtain the radial wind speed by non-continuous conical scanning.

[0054] Such as figure 2 Shown is a schematic diagram of the discontinuous conical scanning method. The non-continuous conical scanning method means t...

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Abstract

The invention discloses a turbulence parameter inversion method based on wind speed data of a laser radar. The method comprises the steps that the laser radar is controlled to adopt a discontinuous conical scanning mode to obtain a radial wind speed; the radial wind speed and related angle parameters during discontinuous conical scanning are utilized to calculate the radial wind speed pulsating quantity; the radial wind speed pulsating quantity is utilized to calculate a measured azimuth speed structure function, and a dissipation rate is calculated combined with a theoretical transverse speedstructure function in a Kolmogorov model; other turbulence parameters are calculated through the radial wind speed and the dissipation rate. The turbulence parameter inversion method based on the wind speed data of the laser radar has the advantages that a speed measurement error of the radial wind speed is reduced through the discontinuous conical scanning mode, the Kolmogorov model is adopted,after subtraction is carried out on the speed structure functions to eliminate a noise item, the dissipation rate is calculated, not only are the measurement errors of turbulence parameters reduced through the mode, but also the energy, the integral scale, the momentum flux and the height of an atmospheric boundary layer except the dissipation rate can be measured.

Description

technical field [0001] The invention relates to the field of turbulence detection, in particular to a turbulence parameter inversion method based on laser radar wind speed data. Background technique [0002] Atmospheric turbulence is the irregular fluctuation of airflow with spatial position and time in three-dimensional space. With the fluctuation of airflow, the concentration of atmospheric material properties such as temperature and humidity all fluctuate irregularly. This irregular motion is mainly caused by wind shear instabilities, thermal convection and wave instabilities in the atmosphere. [0003] Atmospheric turbulence effect, as a branch of optics, has received extensive attention. When the laser is transmitted through the atmosphere, the random disturbance of the atmospheric turbulence causes the random disturbance of the atmospheric refractive index, causing light intensity fluctuations, phase fluctuations, beam drift and beam expansion, which has become one of...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/95
CPCY02A90/10
Inventor 王璐夏海云王冲吴云斌魏天问
Owner UNIV OF SCI & TECH OF CHINA
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