快照的时间反转和逆时偏移法对含有固体分层介质中目标的超声检测  

Ultrasonic detection of a target in layered media containing solid using the snapshot time reversal and reverse time migration method

作　　者：杨红娟 李鉴 马军[1] 高翔[5] 李俊红[1] 王文[1,2] 汪承灏[1,2] YANG Hongjuan;LI Jian;MA Jun;GAO Xiang;LI Junhong;WANG Wen;WANG Chenghao(Institute of Acoustics,Chinese Academy of Scicnces ,Beijing 100190;University of Chinese Academg of Sciences ,Beijing 100049;Wuhan Teatile University, Wuhan 430200;State Key Laboratory of Aeoustics,,Institute of Acoustics,Chimese Academy of Sciences,Beijing 100190;Faculty of Materials and Manufacturing,Beijing University of Technology ,Beijing 100124)

机构地区：[1]中国科学院声学研究所,北京100190 [2]中国科学院大学,北京100049 [3]武汉纺织大学,武汉430200 [4]中国科学院声学研究所声场声信息国家重点实验室,北京100190 [5]北京工业大学材料与制造学部,北京100124

出　　处：《声学学报》2022年第1期95-104,共10页Acta Acustica

基　　金：中国科学院重点部署项目(QYZDY-SSW-JSC007);国家自然科学基金项目(11804256)资助。

摘　　要：快照的时间反转和逆时偏移方法已实现了液-液分层介质中目标的超声检测和定位,现进一步推广到含有固体分层介质情形。由于在含有固体分层介质中,都存在多种的反射波和散射波,因此提出一种筛选方法,首先从中筛选出散射波以及所属波型,再利用快照的时间反转和逆时偏移方法进行处理。实验分别研究了固-液、液-固和固-固分层介质3种情况。利用快照的时间反转和逆时偏移法进行处理,在空间就形成了一个峰状的分布,其峰顶的位置与实际目标的位置比较吻合,误差在一个波长左右。因而,实现了含有固体分层介质中目标的超声检测和定位。The ultrasonic detection and location of a target in liquid-liquid layered media have been achieved using the snapshot time reversal and reverse time migration method.Here,this method is applied to layered media containing solid.Due to the existence of a large number of reflected and scattered waves for layered media containing solid,a screening method is proposed.Firstly,the scattered wave and its wave mode are screened out,and then it can be processed using the snapshot time reversal and reverse time migration method.Experimental researches include three cases of solid-liquid,liquid-solid,and solid-solid layered media.After processing by the snapshot time reversal and reverse time migration method,a peak-like distribution in space is formed.The position of the summit is in agreement with the actual position of the target,and the error is about one wavelength.Therefore,the ultrasonic detection and location of a target in layered media containing solid can be achieved.

关 键 词：分层介质 快照 时间反转 逆时偏移 散射波 超声检测 反射波 检测和定位 

分 类 号：TB553[理学—物理]