摘要
Abstract
To address signal attenuation and reduced sensitivity in traditional ultrasonic anemometers under adverse conditions,such as precipitation,high-velocity winds,and dust,an ultrasonic anemometer featuring adaptive signal gain adjustment has been developed.The hardware architecture integrates driving and receiving stages,a programmable gain amplification and adjustment circuit,a filtering circuit,an analog-to-digital(AD)acquisition,and a central MCU.The system leverages a robust software suite combining time-differ-ence,ringing,and cross-correlation methods,alongside a binary-search-based adaptive adjustment algorithm to calculate wind speed and direction.The experimental validation demonstrates that the anemometer maintains high precision and stability across challenging envi-ronmental conditions.It achieves an error of±0.5 m/s within the 0～15 m/s range,while maintaining an error margin of within±3%for speeds between 15～40 m/s.Across the full 0～40 m/s spectrum,the absolute wind direction error remains consistently below 3°.关键词
超声波/风速风向仪/时差法/互相关/信号增益Key words
ultrasonic wave/anemometer/time-difference method/cross-correlation/signal gain分类
信息技术与安全科学
