| 采用M序列相关法测量材料界面的声散射特性 |
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| 引用本文： | 王卫防,盛胜我.采用M序列相关法测量材料界面的声散射特性[J].应用声学,1999,18(6):29-33. |
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| 作者姓名： | 王卫防 盛胜我 |
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| 作者单位： | 1. 上海轮胎公司轮胎研究所,上海,200082
2. 同济大学声学研究所,上海,200092 |
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| 摘 要： | 用Ｍ序列进行材料方向性声散特性的测量，其基本思路是以伪随机Ｍ序列作为测试信号利用相关的方法测得系统的脉冲响应，根据直达声和各次反射声到达时间加以相应的窗隔离出散射脉冲信号，再进行方向性对比。本文介绍了测量的基本原理和应注意的问题，并给出了一个具体的测量系统实验典型。
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| 关 键 词： | 散射特性 M序列 相关法 材料界面 声散射 |
Sound scattering measurement using the M-sequence correlation technology |
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| Wang Weifang,Sheng Shengwo.Sound scattering measurement using the M-sequence correlation technology[J].Applied Acoustics,1999,18(6):29-33. |
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| Authors: | Wang Weifang Sheng Shengwo |
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| Institution: | Institute of Acoustics, Tongji University, Shanghai, 200092;Institute of Acoustics, Tongji University, Shanghai, 200092 |
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| Abstract: | in this paper, a new concept for sound scattering measurement of the material surface is introduced: first, measure the system impulse response by correlation using the M-sequence as input signal, next, add a time-window depending on the arrival times of the direct-arrival impulse and the scattering reflected impulses to sift out the scattering impulse, and then perform the directional contrast. The above concept's basic principle and several key problems are discussed. In addition, one specific measuring system and a representative measurement are shown. |
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| Keywords: | Scattering characteristic M-sequence Correlation |
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