【作者】 张振华； 汪素萍； 宫先仪；

【Author】 Zhang Zhenhua Wang Suping Gong Xianyi (Hangzhou Applied Acoustics Research Institute,Hangzhou City,Zhejiang Province,China)

【机构】 杭州应用声学研究所；

【摘要】 利用时反可以在声源位置得到空时聚焦。时反聚焦的分辨力给出了该条件下匹配场处理的性能上限。本文推导了自由场的分辨力,并利用镜像法来计算波导中的时反分辨力,同时得到有效孔径的表达式.对实验室波导数据进行了简要的分析,并与理论值作比较,进行验证。更多还原

【Abstract】 Space-time focusing on the probe source can be achieved using time reversal.The focus size realized with a TRM can be considered as the maximum achievable resolution of MFP.in this paper,we formulate the equations describing time reversal focusing in free space and ocean waveguides with an image method.And also we derived the equations of effective aperture of TRM.Time reversal experiments in waveguide are briefly described and the measured foci are presented and compared with the theory.更多还原