利用高频矢量声场和海洋背景噪声的被动地声反演技术

项目名称： 利用高频矢量声场和海洋背景噪声的被动地声反演技术

项目编号： No.61471327

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 蒋飚

作者单位： 中国船舶重工集团公司第七一五研究所

项目金额： 80万元

中文摘要： 本项目研究基于高频矢量水听器和海洋背景噪声的被动地声反演技术。利用矢量水听器的指向性和振速分量尤其是垂直振速分量中包含的地声信息，研究小孔径高频矢量阵地声反演的性能，包括海底参数反演的灵敏度和估计方差的理论性能限。利用海面薄层噪声自上而下的传播模型，研究其海底反射损失匹配反演的性能，并研究高分辨海底反射损失估计方法。同样基于海洋背景噪声，研究矢量阵或单/双矢量水听器的被动回音测深技术，对海底和各地层反射界面的深度进行估计。本项目的研究立足理论和试验数据验证，推动高频矢量水听器被动反演的发展，为水下便携式海洋参数观测提供一种有效途径，在水下自主航行器的快速海洋勘测以及水面/水下目标分辨方面将有应用前景。

中文关键词： 矢量阵；地声反演；海底反射损失；参数灵敏度；回音测深仪

英文摘要： Passive geoacoustic inversion using high frequency vector sensor and ocean ambient noise will be investigated in this project. Utilizing the directivity and the geoacoustic information included in the particle velocities, especially inside the vertical velocity component, we will study the performance of geoacoustic inversion by a small aperture high frequency vector sensor array (VSA), including the seabed parameter sensitivity and the theoretical performance limits of the estimation variance. Using the propagation model of the surface sheet noise travelling downwards, the matched bottom reflection loss (BRL) inversion method will be studied. Furthermore,the high resolution BRL estimation algorithms will be examined. Also based on the ambient noise, the fathometer method using a VSA or single/twin vector sensor will be investigated to estimate the depths of the seabed and the subbottom reflective interfaces. The research in this project is established in theoretical analysis and real data verification,aiming to push forward the vector sensor based passive geoacoustic inversion method. It would provide an effective approach for compact ocean obseverations, and it is promising to be used in autonomous underwater vehicles (AUVs) for rapid ocean explorations and finds applications in surface/subsurface target classifications.

英文关键词： Vector sensor array;Geoacoustic inversion;Bottom reflection loss;Parameter sensitivity;Fathometer