| 分层介质声特征阻抗反演 -预处理方法实验验证与比较 |
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| 引用本文： | 郭永刚,王宁,林俊轩.分层介质声特征阻抗反演 -预处理方法实验验证与比较[J].中国海洋大学学报(自然科学版),2001,31(6):943-949. |
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| 作者姓名： | 郭永刚 王宁 林俊轩 |
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| 作者单位： | 青岛海洋大学, |
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| 基金项目： | 山东省科委中青年科学家基金资助 |
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| 摘 要： | 数值不稳定性长期困扰着声反演方法的应用.避免该问题的方法之一是进行冲激响应提取的预处理,由冲激响应反演实验材料的各层反射系数序列,重建特性阻抗剖面.该文采用不同反卷积的方法提取冲激响应,反演阻抗剖面,并就精度及运算时间进行详细比较,反演结果与实测及手册数值相当吻合.
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| 关 键 词： | 数值不稳定性 冲激响应 声阻抗 反卷积 |
| 文章编号： | 1001-1862(2001)06-943-07 |
| 修稿时间： | 2000年12月8日 |
Inverting Acoustic Impedance in Layered Medium Pre-Process Experimental Verification and Comparison |
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| Guo Yonggang,Wang Ning,Lin Junxuan.Inverting Acoustic Impedance in Layered Medium Pre-Process Experimental Verification and Comparison[J].Periodical of Ocean University of China,2001,31(6):943-949. |
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| Authors: | Guo Yonggang Wang Ning Lin Junxuan |
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| Abstract: | Numerical instability has puzzled the users of acoustic inverse methods for decades. To overcome this problem, deconvolution processing for extracting impulse response has to be done. In this paper, different deconvolution algorithms are adopted to extract the impulse response from experiment data, and then inverse the reflection coefficient sequence, so that we can reconstruct the acoustic impedance profile. The precision and computational cost for the different methods are investigated carefully, and the inverse results are quite close to the measured data and the manual data. |
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| Keywords: | numerical instability impulse response acoustic impedance deconvolution |
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