东南大学学报（英文版）2005，Vol.21Issue(1)：20-23,4.
基于DSP的超声风速测量
Ultrasonic wind velocity measurement based on DSP
摘要
Abstract
Ultrasonic transmitting,receiving and amplifying circuits are designed.The received signals are sampled with the high speed ADC (analog-to-digital converter),and dealt with the DSP (digital signal processing).A forward-backward IIR (infinitive impulse response) filter with no delay is designed to filter the sampled data,and series A and B are achieved by narrow and wide band filtering,respectively.In series A,the start point of the cycle first exceeding the threshold is calculated accurately by interpolation,and the start cycle is detected by fitting cycles in series A and its inversion A'to cycles in B with variance analysis.Therefore,the start point of the start cycle is calculated precisely.By deriving the relationships between the travel time in the opposite directions of three axes and the airflow velocities,the wind velocity and direction are calculated.Experiments show that the reliability and the precision are improved,and the circuits are simplified.关键词
超声波/IIR滤波器/DSP/风速Key words
ultrasonics/IIR (infinitive impulse response) filter/DSP (digital signal processing)/wind velocity分类
信息技术与安全科学引用本文复制引用
唐慧强,黄惟一,李萍,吕清华..基于DSP的超声风速测量[J].东南大学学报（英文版）,2005,21(1):20-23,4.基金项目
The Natural Science Foundation of Higher Education Institutions of Jiangsu Province (No.02KJD460005). （No.02KJD460005）
