顾及面积差的层内等效二段线替代法优化声速剖面  

In-layer equivalent two-segment line substitution method for sound velocity profile considering area difference

作　　者：肖元弼 彭认灿[3] 董箭[3] 马政伟[1,2] 刘聚 XIAO Yuanbi;PENG Rencan;DONG Jian;MA Zhengwei;LIU Ju(Institute of Operation Software and Simulation,Dalian Naval Academy,Dalian 116018,China;Postdoctoral Programme,Dalian Naval Academy,Dalian 116018,China;Department of Military Oceanography and Surveying,Dalian Naval Academy,Dalian 116018,China;Troops 91388,Zhanjiang 524000,China)

机构地区：[1]海军大连舰艇学院作战软件与仿真研究所,辽宁大连116018 [2]海军大连舰艇学院战术学博士后科研流动站,辽宁大连116018 [3]海军大连舰艇学院军事海洋与测绘系,辽宁大连116018 [4]91388部队,广东湛江524000

出　　处：《测绘学报》2023年第12期2028-2038,共11页Acta Geodaetica et Cartographica Sinica

基　　金：中国博士后科学基金(2022M723888);国家自然科学基金(42071439)。

摘　　要：声速剖面是多波束测深系统中至关重要的参数,针对声速剖面简化层内精度不高的问题,本文提出一种顾及层间面积差的声速剖面自适应分层优化方法——层内等效二段线替代法。基于声速最大偏移量方法,构建了一种优化替代声速剖面的最优层内等效二段线计算模型,并利用实测多波束测深数据对该算法进行了验证。通过实例分析发现该方法在多处地形起伏较大的区域,还原效果更好,更有效地保留了声速剖面特征点。统计结果表明,该方法可将整体水深数据和层间水深数据的标准差百分比控制在1%以内,在声速剖面等效面积差较大的深度,其计算的水深值更加接近原始声速剖面的计算结果。该方法可对复杂多层海水声速进行精确简化,在起伏较大的特殊海底地形的高精度测量中具有重要工程应用价值。Sound velocity profile is an important parameter in multi-beam sounding system.In this paper,an adaptive layering optimization method of sound velocity profile considering the area difference between layers is proposed,which is the in-layer equivalent two-segment line substitution method.Based on the method of maximum acoustic velocity offset,a calculation model of the equivalent two-segment line in the optimal layer is constructed through model analysis and derivation.The algorithm is validated by using measured multi-beam sounding data.The results show that this method can control the percentage of standard deviation of water depth between the whole water depth data and the interlayer water depth data within 1%.Because the method can accurately calculate the sound velocity of complex multilayer seawater,it has important engineering application value in high precision measurement of special seabed topography with large fluctuation.

关 键 词：声速剖面 多波束测深数据 声速剖面简化 层内等效二段线替代法 等效面积差 

分 类 号：P229[天文地球—大地测量学与测量工程]