ADCP方向谱估计的倾斜修正算法研究  

Tilt correction algorithm of ADCP wave directional spectrum estimation

作　　者：郑威[1] 杨立[1] 惠力[1] 刘敏[1] 王志[1] 

机构地区：[1]山东省科学院海洋仪器仪表研究所,山东青岛266001

出　　处：《山东科学》2014年第4期1-7,共7页Shandong Science

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。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.

关 键 词：ADCP 倾斜修正 俯仰角 横滚角 ADCP安放深度 

分 类 号：P716[天文地球—海洋科学]