【摘要】 声学多普勒流速剖面仪(ADCP)是用来测量不同深度上海水流速的仪器,在测流基础上可以通过速度测点组成阵列反演海洋表面波浪。当ADCP倾斜时,速度测点位置发生偏移,导致方向谱估计出现误差,为提高测量精度,有必要对测点位置进行修正。本文在引入旋转矩阵的基础上给出了当ADCP倾斜时的测点位置修正方法,通过仿真和实测数据分析表明,当ADCP倾斜时,方向谱估计误差不仅和俯仰角横滚角有关,同时与ADCP安放深度有关。该倾斜修正算法,同时考虑姿态角和安放深度,提高了ADCP倾斜状态下的方向谱估计精度。更多还原

【Abstract】 Acoustic doppler current profiler( ADCP) is an instrument to measure seawater velocity at different depth. It can estimate sea surface wave directional spectrum with velocity measurement points array based on ADCP current measurement. When ADCP tilts,position offset of velocity measurement point occurs. An error will then appear for wave directional spectrum estimation,so measurement point correction is necessary to improve measurement accuracy.Simulation and data analysis indicate that directional spectrum estimation error depends on posture angle pitch and roll and ADCP setting depth. The algorithm considers pitch,roll and ADCP setting depth,so wave directional spectrum estimation precision is improved when ADCP tilts.更多还原