基于STM32与OMAP双机通信的多普勒海流计  

Doppler Current Meter Based on Two-machine Communication Between STM32 and OMAP

作　　者：孙正元 栾新[1] 李国栋[1] 彭东立 贾鹏飞[1] 宋大雷[1] 周丽芹[1] 

机构地区：[1]中国海洋大学,山东青岛266100 [2]中国科学研究院声学研究所东海站,上海200032

出　　处：《仪表技术与传感器》2017年第9期34-37,共4页Instrument Technique and Sensor

基　　金：国家高技术研究发展计划(863计划)资助项目(2012AA091802)

摘　　要：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 STM32 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.

关 键 词：海流计 多普勒 双机通信 时变增益 STM32 OMAP 

分 类 号：TH766[机械工程—仪器科学与技术]