Measuring device and measuring method of light propagation path transverse average wind speed and wind direction

A technology of mean wind speed, measuring device, applied in the field of atmospheric optics

Inactive Publication Date: 2013-04-24
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a light propagation path transverse average wind speed and direction measurement device and method to overcome the shortcomings of the existing light propagation path transverse average wind speed measurement technology

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  • Measuring device and measuring method of light propagation path transverse average wind speed and wind direction
  • Measuring device and measuring method of light propagation path transverse average wind speed and wind direction
  • Measuring device and measuring method of light propagation path transverse average wind speed and wind direction

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Embodiment Construction

[0032] Such as figure 1 shown. The measuring device of the present invention includes two parts, a transmitting system and a receiving system. The transmitting system includes a semiconductor laser 2, a beam expander 3, and the receiving system includes a beam reducing mirror 4, an area array CCD detector 5, a data line 6 for data transmission and a notebook. The computer 8, wherein the semiconductor laser 2 and the area array CCD detector 5 are mounted on the triangular adjustment frame 1 and the triangular adjustment frame 7 respectively, can realize the adjustment of height, level and pitch. The energy emitted by the semiconductor laser 2 is 20mw, the wavelength is 635nm, and the laser beam with a divergence angle of about 0.1mrad is incident on the beam expander 3, and the expanded laser beam is collimated and incident into the atmosphere, subject to the random fluctuations of atmospheric turbulence and wind field , the amplitude and phase of the light wave will also fluc...

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Abstract

The invention discloses a measuring device and a measuring method of light propagation path transverse average wind speed and wind direction, and a measuring system comprises a semiconductor laser device, a beam expander, a beam compressor and an area array charge coupled device (CCD) detector. Light beams sent by the semiconductor laser device first pass through the beam expander to be expanded to be parallel beams with certain cross sections and be incident into air, due to the disturbance of atmospheric turbulences and atmospheric wind fields, the random fluctuation effect of scintillation and phases is generated, light intensity scintillation in different positions on the cross sections of the light beams is detected by the area array CCD detector at the receiving end, scintillation correlation characteristics between different aperture pairs are obtained through statistics, and then the information of the light propagation path transverse average wind speed and the wind direction is obtained according to the relation of the path transverse wind speed and the differential coefficient of the normalization time delay cross-correlation function in the position of tau = 0.

Description

technical field [0001] The invention relates to the field of atmospheric optics, in particular to a device and method for measuring the transverse average wind speed and direction of a light propagation path realized by using the correlation characteristics of light intensity scintillation detected on a laser atmospheric propagation receiving end detector. Background technique [0002] The study of wind speed, which is one of the important meteorological parameters, is of great significance. In aviation monitoring, weather forecasting and climate change research, atmospheric wind field data are required. In laser atmospheric turbulent transmission, the random fluctuation of path transverse wind speed is one of the important factors restricting the atmospheric transmission of light waves. Due to the existence of transverse wind speed on the light propagation path, the turbulence changes rapidly, and the transverse average wind speed and turbulence intensity determine the cohe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/26G01P13/02
Inventor 苑克娥胡顺星朱文越饶瑞中张世国曹开法徐之海邵石生黄见
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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