海流测量是海洋科学研究的重要方向,文中设计了一种利用宽带信号测流的声学多普勒海流计,给出了基于STM32与OMAP(开放式多媒体应用平台)双机通信的海流计设计方案,阐明了双机通信的通信协议及软件实现方法,采用两级时变增益电路解决了回波信号动态变化大的问题.在千岛湖区采取船载DGPS走航方式完成了海流计的精度及性能测试,试验表明研发的海流计的测流精度优于 ±1%测量值,且具有较好的稳定性.%Ocean current plays a crucial role in the marine scientific research , an acoustics doppler current meter using broadband signal was developed .This paper showed the design of Doppler current meter based on communication between STM 32 with OMAP and the two-machine communication protocol and the implementation of software .A two-stage TVG ( time-variant gain) amplifier circuit was designed to solve the problem that the echo signal may become large dynamic range .The experiment shows the precision is better than ±1%of reading and good stability in Qian Dao Lake by ship-mounted DGPS method to finish current meter precise and performance test .
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