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本文提出一种垂直入射声脉冲遥测海底表层沉积物类型的方法。一些作者已经指出,海底反射系数可以作为特征量用于识别沉积物类型。然而,回波信号的形状可能包含沉积物类型更多的信息。本文尝试从回波包络的形状提取分类特征量。作者在实验中采取了减少表面散射影响的措施,采用较高的频率(120kHz),突出了沉积物中声衰减系数对回波包络形状的作用,从而提取出一个与衰减系数相关联的分类特征量F。该特征量与海底反射系数、海底粗糙度无关,用计算机软件实现了分类器。对五类海底分类75次的成功率为77.3％。
In this paper, a method of remote acoustic pulse telemetry of submarine surface sediment types is proposed. Some authors have pointed out that seafloor reflection coefficients can be used as feature quantities to identify sediment types. However, the shape of the echo signal may contain more information on the type of deposit. This article attempts to extract the classification feature from the shape of the echo envelope. In experiments, the authors took measures to reduce the effect of surface scattering by using a higher frequency (120 kHz), highlighting the effect of acoustic attenuation coefficients in sediments on the shape of the echo envelope, and thus extracting a classification associated with the attenuation coefficient Feature F The characteristic quantity has nothing to do with the sea floor reflection coefficient and the seafloor roughness, and the classifier is realized by computer software. The success rate for the five seabed categories 75 was 77.3%.