The Study Of Ocean Surface Wind Field Simulation And Detection Methods

In the wind field study, mutations are often caught off guard, what brings great harmto human activities in many cases, especially the small-scale wind shear under clear skies.The accuracy of conventional microwave radar detection can not meet the humansecurity requirements. Laser wind radar has higher detection accuracy and spatialresolution, which can be combined with the microwave to measure wind speed in spaceto achieve better results.This paper analyzes the working principle of laser radar, and analyzes objectdetection and detection methods with theoretical analysis, simulation and experimentalresearch data. Firstly, started from the environmental characteristics, according to thescale of tracer particles, the band and detection methods were selected, which was finallydetermined to use the1.55m coherent detection systems. Secondly, we studied severalclassification of wind fields which were harmful to the aircraft, then established aphysical model of the wind field, and carried out mathematical simulation, and resultsshowed the structure of the reproduction of the wind field to some extent. Finally, we dida detailed study for the heterodyne detection methods. From improving the signal tonoise ratio of heterodyne detection system perspective, the effects of different factors, theinfluence of external differential efficiency, balanced detection principle and the LOsignal to noise ratio of the optical power were studied. We built a1.55um coherentdetection test system, and do the best local oscillator optical power test and balanceddetection and contrast detection unit test respectively, which turned out the test results areconsistent with the theoretical analysis.