Study On Near Space Wind Measurement By Airship Acoustic Technic Technology

The flight of a stratospheric airship requires real-time acquisition of data from the air wind field in the region.The current detection method is difficult to meet the needs of in situ and real-time measurement of the atmospheric wind field.This paper proposed the board acoustic wind technology for the first time,which places the measuring device on the stratospheric airship.This technology can not only achieve real-time measured data in situ detection of the atmospheric wind field around the airship,but also provide the atmospheric wind field data for airship and the accumulation of near space atmospheric dynamics and environmental warning.It also provides continuous data of wind field for the near space atmospheric dynamics and environmental warning for a long time.The measurement method has very strong novelty and feasibility.According to the environmental characteristics of near space,through the comparison and analysis of different wind measurement methods,the improved time difference method is adopted to measure wind speed and the design of the wind measurement method is achieved.This scheme can meet the accuracy of 0.1m\/s wind speed measurement.At the same time,the simulation analysis is carried out.Finally,the signal-to-noise ratio of the signal is determined,which provides a basis for the selection of the acoustic probe.Finally,a more complete wind measurement scheme is obtained.