基于面元散射体集合模型的水下复杂物体高频回波特性研究  

Studies on the characteristics of high frequency echo from complex underwater object based on area element dispersion models

作　　者：陈羽[1] 孟洲[1] 郭炜炜[2] 胡卫东[2] 

机构地区：[1]国防科技大学光电科学与工程学院,长沙410073 [2]国防科技大学电子科学与工程学院,长沙410073

出　　处：《应用声学》2012年第1期60-65,共6页Journal of Applied Acoustics

基　　金：国防科大校预研项目(JC09-04-05)

摘　　要：复杂物体的高频回波特性研究对水下三维成像具有重要意义。本文针对SYSNOISE软件计算内存不足的问题,提出了面元散射体集合模型,有效减小了网格划分产生的节点数量。通过对刚性曲面回波信号的模拟,表明仿真信号可以用来准确成像,初步论证了面元散射体集合模型的正确。波束形成成像结果表明,本文方法可在成像结果中较好地显示刚性曲面的三维形状,对于水下目标的识别有着重要的意义。tudies on the characteristics of high-frequency echo from complex objects are significant for three-dimensional underwater imaging.In order to overcome the weakness of computer memory of SYSNOISE,an area element dispersion model is put forward in this paper,It can decrease the number of meshing nodes effectively.It is indicated through the simulation of the rigid curving area that the simulated signals can be used for imaging exactly,and the primary correctness of this model is validated.The result of imaging based on beamforming shows that three-dimensional shape of a rigid curving area can be obtained using the method in this paper,and it is important to identify the underwater targets.

关 键 词：高频回波 SYSNOISE 面元散射体集合模型 

分 类 号：TB56[交通运输工程—水声工程]