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应用科学学报 >

2013 , Vol. 31 >Issue 3: 266 - 270

DOI: https://doi.org/10.3969/j.issn.0255-8297.2013.03.008

信号与信息处理

根据反射声波相位信息识别分层介质结构

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  • 1. 上海大学通信与信息工程学院，上海200072
    2. 水下测控技术重点实验室，大连116013
    3. 中国科学院东海研究站，上海200032
王朔中，教授，博导，研究方向：信号处理、数字图像处理、多媒体信息安全、水声学，E-mail: shuowang@shu.edu.cn

收稿日期: 2012-11-21

  修回日期: 2013-03-12

  网络出版日期: 2013-03-12

基金资助

国家自然科学基金(No.61071187)；水下测控技术重点实验室基金(No.9140c260201110c26)资助

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Classification of Layered Structures Using Phase Information of Reflected Sound

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  • 1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China
    2. Key Laboratory for Underwater Test and Control Technology, Dalian 116013, Liaoning Province, China
    3. Shanghai Acoustics Laboratory, Chinese Academy of Sciences, Shanghai 200032, China

Received date: 2012-11-21

  Revised date: 2013-03-12

  Online published: 2013-03-12

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摘要

通过提取分层介质声回波的相频特征信息，对物理性质未知的分层材料实现了有效的分类识别. 分类对象为单层材料、包含两种不同声速和密度的两种双层材料、外层较硬中间较软的三层结构，硬和软是指两种材料c值的相对大小. 数值模拟表明该方法对4种分层结构能进行有效识别. 采用优化的分类流程可减小测量的工
作量.

关键词： 声回波; 分层介质; 相位特征; 分类

本文引用格式

王露贤1， 王朔中1， 陈云飞2， 王润田3， 邹婷婷1 . 根据反射声波相位信息识别分层介质结构[J]. 应用科学学报, 2013 , 31(3) : 266 -270 . DOI: 10.3969/j.issn.0255-8297.2013.03.008

Abstract

This paper presents a method for classification of layered materials with unknown physical properties based on the phase-frequency characteristics of acoustic reflection coefficients. Layered structures under consideration include a single layer material, double-layered plates with harder and softer materials on the two sides respectively, and a sandwich structure with a harder material as the outer layers and a softer material in the middle. A set of criteria for differentiating the types of structure is given. Numerical simulation shows effectiveness of the method with a high rate of correct classification.

Key words： acoustic reflection; layered materials; phase features; classification

参考文献

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