近场浅海舰船目标定位精度实验研究

根据聚焦波束形成声图处理方法在实际海上测量的特点,提出用系统时延差校准、基阵倾角修正、深度测量、分频段目标定位等多种方法克服测量系统及环境的各种不利因素,实现舰船目标高精度定位。采用声图计算结果与GPS记录值对比、声图计算结果与GPS记录值的正横距对比两种方法进行了聚焦波束形成声图法精度的实验验证,经验证聚焦波束形成声图处理方法在浅海测量区有较高的定位精度。其最大正横距差值可以达到2.9 m,均值0.93 m,从而实现舰船目标高分辨精确定位。 

Experiment research on near field shallow sea warship target localization precision

According to characteristics of underwater acoustic image processing method on real-time sea measurement, several methods were proposed to overcome various disadvantage factors.These methods included system time delay error calibration,array lean angle amendment,depth measure and dividing frequency band target localization.The experiment validate of underwater acoustic image localization precision was made by two contrastive methods:underwater acoustic image result and GPS register value,abeam distance of underwater acoustic image result and abeam distance of GPS register value.By the experiment validate,underwater acoustic image is demonstrated to have better localization precision on shallow sea.The biggest abeam distance error reaches 2.9 m and mean reaches 0.93 m,consequently warship target localization with high resolution is realized.