声学多普勒流速剖面仪近底有效流速数据处理初步研究

通过分析声学多普勒流速剖面仪(Acoustic Doppler Current Profiler,ADCP)的声强垂向剖面分布特征,利用数学极值定理,确定床面边界位置,进而确定出ADCP记录的所有在水中的流速单元,将ADCP处理软件"丢弃"的部分近底流速数据或由于底跟踪丢失而损失的流速数据确定出来。利用"六点法"同时、同高度的电磁海流计流速数据对提取出来的ADCP近底流速数据进行验证。验证结果表明,提取出来的ADCP近底流速数据可信、可用。

Near bed velocity treatment of Acoustic Doppler Current Profiler

The paper gives the detailed instruction on the data acquirement of the valid cells of Acoustic Doppler Current Profiler(ADCP)near bed1 According to the analysis of the vertical distribution of the signal amplitude with the extremum theorem,the location of the bed is fixed and the velocity data are extracted which was once lost due to the disadvantage of ADCP software and the errors of the bottom track algorithm. The validity of the extracted data is verified by using the synchronous data with the same depth of electric current meter. The data acquirement of valid cells of ADCP near bed provides a kind of convenient and effective measurement of the velocity near bed and enriches the vertical velocity data,too.