Research On Boundary Layer Wind Field Measurement Method Using An UAV Equipped With An Anemometer

With the development of the times,accurately obtaining the boundary layer wind field condition is more and more important for building wind resistance design;with the development of science and technology,there are more and more wind measurement research methods;this article innovatively proposes a use of six rotors The new method of UAV equipped with anemometer for wind field measurement has been compared with the wind measurement tower to explore its feasibility,and then carried out field survey research on the boundary layer wind field.First of all,according to the research results at home and abroad,a wind tunnel experimental study was carried out.The appropriate height for the anemometer to be installed above the center console of the hexarotor UAV is determined.On the one hand,it does not affect the normal flight and stability of the hexarotor UAV.On the other hand,it prevents the blades of the hexarotor UAV from rotating.Affect the wind measurement accuracy of the anemometer.Furthermore,two six-rotor UAV wind measurement systems equipped with anemometers were constructed and experimental flights were carried out.Secondly,the wind measurement tower is used to evaluate and analyze the wind measurement feasibility of the six-rotor UAV wind measurement system.The results show that there is a certain difference between the measured average wind speed of the wind measurement system and the measured wind speed of the wind measurement tower.The measurement results of the wind system are corrected to be close to the wind speed of the wind measurement tower,and the wind speed error is controlled within ±3%;at the same time,the pulsating wind characteristic parameters measured by the UAV and the wind measurement tower are further compared and analyzed,and the results show that : The turbulence degree,gust factor and turbulence integral scale of the two are relatively close,and the error is controlled within ±5%.Thirdly,using the wind measurement tower and the six-rotor UAV wind measurement system,the average wind characteristics and fluctuating wind characteristics within 100 m of the measured site were analyzed,and the average wind profile,turbulence profile and turbulence integral scale profile were fitted.The ground roughness is calculated,and the results show that the accuracy of the wind profile fitted by the six-rotor UAV and the wind measuring tower is high,and it is close to the national standard B-type landform,which is in line with the landform condition of the measured site.Finally,based on the above-mentioned wind measurement system,two UAV wind measurement systems are used innovatively to conduct wind measurement research.Using dual drones to investigate the average wind characteristics and fluctuating wind characteristics within 120 m of the actual measured site,and at the same time to conduct wind profile analysis and research on the wind field under different incoming winds and different landforms.The results show that: based on dual drone measurements The wind system has high accuracy,and the accuracy of the fitted wind profile is high,which can reflect the characteristics of the wind field under different landforms more realistically and concretely,which preliminarily proves the feasibility of the wind measurement method based on dual drones.