摘要
研究了用声点源入射波所获得的近场散射数据来成像海洋波导环境中三维未知目标的反问题.发展了一种指示器样本快速成像方法,即不需要预先知道未知目标的声学特性就能非常快速成像.数值试验表明:该方法对成像海洋波导中三维目标是有效的,即使在有限孔径的测量方式和具有噪声散射场测量数据的情况,也能够得到未知目标的一个理想成像,而且还表明了海洋波导边界的多重反射效应对成像效果具有一定的正面影响.
This paper studied the inverse problem of reconstructing a 3D unknown object in an ocean waveguide from near-field measurements of the scattered fields with many acoustic point source incidences. An indicator sampling method for fast imaging such an object was presented. A particular feature of the method is that it does not depend on any acoustic properties of the unknown object and its numerical implementation is very fast. The numerical results show that the proposed method is valid for obtaining a good reconstruction of the unknown object, even when the scattered data are measured in a limited aperture and are corrupted by noise. Moreover, in general, the multiple scattering effects between the object and the waveguide boundaries have some positive influence on the reconstruction of the unknown object.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2005年第6期983-988,共6页
Journal of Shanghai Jiaotong University
基金
高等学校全国优秀博士学位论文作者专项基金
上海市教委曙光学者计划基金资助
关键词
声散射
目标成像
海洋波导
反问题
sound scattering
object imaging
ocean waveguide
inverse problem
