文章摘要
石靖鹏,彭东立,朱安珏.OMAP平台嵌入式声学多普勒流速剖面仪系统设计与实现[J].声学技术,2014,33(3):199~203
OMAP平台嵌入式声学多普勒流速剖面仪系统设计与实现
Design and implementation of embedded acoustic Doppler current profiler system based on OMAP platform
投稿时间:2014-03-28  修订日期:2014-05-02
DOI:10.3969/j.issn1000-3630.2014.03.003
中文关键词: 开放式多媒体应用平台  复相关测频  中频正交采样
英文关键词: OMAP  complex correlation algorithm  quadrature sampling of intermediate frequency signal
基金项目:
作者单位E-mail
石靖鹏 中国科学院声学研究所东海研究站, 上海 200032 sjpstone@126.com 
彭东立 中国科学院声学研究所东海研究站, 上海 200032  
朱安珏 中国科学院声学研究所东海研究站, 上海 200032  
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中文摘要:
      在TI公司OMAP-L137双核平台的基础上,对嵌入式声学多普勒测流系统进行设计和实现,并通过实验对系统测流精度和性能进行验证。先通过中频正交采样构建回波复包络信号,再采用复相关算法检测信号的频移进行流速测量。在文中对算法进行了研究和原理分析。OMAP中的DSP核主要负责回波处理,系统设计包括系统控制、数据通信、信号处理等。结合仿真测试,并通过某湖水下实验对设备进行了精度和性能验证,获得了良好的测流效果并且系统具有很好的稳定性,达到了预期的设计指标。对于嵌入式平台水声设备的研制有一定的参考价值。
英文摘要:
      The embedded Acoustic Doppler Current Profiler (ADCP) system has been developed on the basis of TI OMAP-L137 dual-core platform, and the measurement precision and performance are verified by experiments. Building complex echo signal first through intermediate frequency quadrature sampling, and then deriving water velocities by detecting the frequency shifts with complex correlation algorithm, and the principle of the algorithm is studied in the paper. The DSP core of OMAP is mainly responsible for echo processing, system design including system control, data communication, signal processing, etc. Combining the simulation tests, precision and performance of the equipment are verified by underwater experiment in Qian Dao Lake. Good results of flow measurement and stability of system are obtained, and the desired design index is achieved, which has a certain reference value for the development of the embedded platform sonar equipment.
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