摘要
矢量水听器因能够同时获取声场的声压和三维质点振速分量而倍受关注.矢量水听器在浅海环境下的研究及应用工作较多.2014年在某深海海域进行的水声综合考察实验中,矢量水听器被布放在水下3146 m深处,并成功地接收到了深度为140 m的拖曳声源发射的信号.本文首先结合实验海域环境,分析了深海近水面声源直达波区的声线到达结构以及直达声与海面反射声到达大深度接收器的掠射角,发现二者的均值随距离单调变化,且声源深度变化对其影响较小;然后对实验中两条航线上10 km范围内的信号进行分析,获取目标声源的方位角以及到达矢量水听器的直达声和海面反射声的掠射角,再根据该掠射角对目标声源的距离进行估计,实现了对目标声源在二维平面上的定位,定位结果与目标的GPS航迹符合较好.
Vector sensor has attracted extensive interests for its ability to simultaneously measure the particle velocity and the scalar acoustic pressure field, which has been widely studied in shallow-water acoustics. During a deep-water experiment held in 2014, a vector sensor located at the depth of 3146 m received the experimental signals launched by a towed transducer at 140 m depth. For the experimental environment, the arrival structure of sound rays and the arrival angles of the direct ray and the surface-reflected ray in the direct-arrival zone of a shallow source are analyzed. It is shown that the arrival angles of the direct ray and the surface-reflected ray vary greatly with range, and the variation of the shallow source＇s depth has little influence on their mean arrival angle. Based on such properties, the arrival angles of the direct rays and the surface-reflected rays at the vector sensor are extracted from the experimental signals within the range of 10 km, and then the source ranges are estimated. Moreover, the source azimuths are also estimated with the experimental signals. Combining the estimated source azimuths and ranges, the source locations on the two-dimensional plane are determined. It is shown that the estimated source locations are consistent with the GPS measurements.
出处
《中国科学：物理学、力学、天文学》
CSCD
北大核心
2016年第9期59-66,共8页
Scientia Sinica Physica,Mechanica & Astronomica
基金
国家自然科学基金(编号:11434012,41561144006)
山东省高等学校科技计划(编号:J12LJ56)
泰山学院科研启动基金(编号:Y-01-2013009)资助项目
关键词
矢量水听器
深海声源定位
直达波区
大深度接收
vector sensor, source localization in deep water, the direct-arrival zone, deep receiver
