摘要
Without prior knowledge of medium parameters,a method is proposed to detect and locate a target in layered media.Experiments were carried out for liquid/liquid and solid/liquid layered media,and the location of a target in them was obtained using three methods combined,i.e.,the least-square method,the method of finding minimum dispersal degree of target distribution,and the snapshot time reversal and reverse time migration mixed method.The medium parameters,i.e.,the acoustic velocities of upper and lower media as well as the thickness of the upper medium,were inversed simultaneously.The results show that the position of target is consistent with its actual position.Thus,the detection and location of a target in layered media are achieved without prior knowledge of medium parameters,and it overcomes the difficulty that the common time reversal method only detects the target,but cannot locate it.
作者
Jian Li
Hong-Juan Yang
Jun Ma
Xiang Gao
Jun-Hong Li
Jian-Zheng Cheng
Wen Wang
Cheng-Hao Wang
李鉴;杨红娟;马军;高翔;李俊红;程建政;王文;汪承灏(School of Electronic and Electrical Engineering,Wuhan Textile University,Wuhan 430200,China;State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;College of Mechanical Engineering and Application Electronics Technology,Beijing University of Technology,Beijing 100124,China)
基金
Supported by the Key Research Program of the Chinese Academy of Sciences(Grant No.QYZDY-SSW-JSC007)
the National Natural Science Foundation of China(Grant No.11804256)
the State Key Laboratory of Acoustics,Chinese Academy of Sciences(Grant No.SKLA201807)。
