摘要
采用直接时差法,以TMS320F2812为控制单元控制超声波的发射与接收,实现了超声波风速风向仪的设计。该超声波风速风向仪利用模拟开关设计驱动电路,减少了电磁干扰对电路的影响;利用限幅、放大、正弦脉冲转换的方法设计接收电路,减少了A/D转换波动对信号捕获以及时间点判断的影响。
An ultrasonic anemometer is designed using direct time difference method. TMS320F2812 is used as the control unit for trans- mitting and receiving ultrasonic. Driving circuit is implemented using analog switches, reducing the impact of electromagnetic interference in the circuit. Receiving circuit is designed by using limiting amplification sine pulse transfer, reducing the effect of A/D conversion fluc- tuations on signal acquisition and time point estimation.
出处
《单片机与嵌入式系统应用》
2011年第12期54-56,60,共4页
Microcontrollers & Embedded Systems
