Asymmetric spatial heterodyne spectrometer wind speed measurement calibration device and asymmetric spatial heterodyne spectrometer wind speed measurement calibration method

Abstract

The invention discloses an asymmetric spatial heterodyne spectrometer wind speed measurement calibration device and an asymmetric spatial heterodyne spectrometer wind speed measurement calibration method. The asymmetric spatial heterodyne spectrometer wind speed measurement calibration device comprises two hollow cathode lamp light sources, a beam splitter, a wind speed simulator, an asymmetric spatial heterodyne spectrometer, an imaging lens and a detector. On one hand, a reference light source is introduced into a system, thereby forming interference of mixed light beam; and on the other hand, an interferogram sequence with no frequency shift and an interferogram sequence with certain frequency shift are periodically measured. Phase sequences which correspond with a signal light source and a reference light source are respectively calculated, thereby deducting influence of system error to a phase signal, averaging the processed phase sequences and calculating a difference between the processed phase sequences, calculating an effective phase frequency shift of the signal light source, and accurately obtaining the wind speed through reverse deduction. In laboratory measurement, the asymmetric spatial heterodyne spectrometer wind speed measurement calibration device and the asymmetric spatial heterodyne spectrometer wind speed measurement calibration method have advantages of high stability, high reliability, simple system, easy realization, and high-precision air speed deduction result.

Description

technical field [0001] The invention relates to an asymmetric space heterodyne spectrometer-based device and method for measuring and calibrating wind speeds in the middle and upper layers of the atmosphere, belonging to the field of optical measurement. Background technique [0002] Wind field plays an important role in atmospheric activities, so the study of atmospheric wind speed has become an important method to obtain atmospheric behavior. Passive wind field detection technology is realized in three ways, based on Fabry-Perot interferometry, Michelson interferometry and asymmetric spatial heterodyne interferometry. The Fabry-Perot interferometer reverses the wind speed through the movement of fine and sharp fringes, which has ultra-high measurement accuracy and stability, but has extremely high requirements on the flatness of the etalon, and has a small luminous flux and a large volume. The Michelson interferometer reverses the wind speed through the intensity of four ...

AI Technical Summary

Problems solved by technology

[0004] (1) The wind speed in the middle and upper atmosphere varies in the range of 0-150m / s, and the existing experimental device can only simulate the situation of low wind speed;

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