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为了快速反演获得浅海声速剖面,利用匹配波束构造了反演代价函数,在此基础上研究了浅海声速剖面的匹配波束反演方法(MBI)。并运用东中国海的实验数据进行实际反演,验证了MBI的可行性和鲁棒性。利用垂直线列阵接收的29个不同位置的爆炸声信号进行了声速剖面反演, MBI反演的结果与实验中直接测量的声速剖面一致,且反演声速剖面的均方根误差小于2 m/s。研究结果表明,MBI比常规匹配场反演(MFI)获得浅海声速剖面更快速、更准确,并且对底质参数的失配具有较高的鲁棒性。
In order to obtain the velocity profile of the shallow sea quickly, the inversion cost function is constructed by using the matching beam. Based on this, the matching beam inversion (MBI) method for shallow sea sound velocity profile is studied. The actual inversion of the experimental data from the East China Sea is used to verify the feasibility and robustness of MBI. The acoustic velocity profiles were retrieved from 29 different positions of the acoustic signals received by the vertical line array. The results of MBI inversion are consistent with the sound velocity profiles directly measured in the experiment. The root mean square error of the retrieved sound velocity profiles is less than 2 m / s. The results show that MBI is faster and more accurate than conventional matching field inversion (MFI) in obtaining shallow sea sound velocity profiles and has high robustness to mismatch of sediment parameters.