| 偏振分析在地震信号检测中的应用 |
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| 引用本文： | 林建民,杨微,陈蒙,吴仁豪,葛洪魁.偏振分析在地震信号检测中的应用[J].中国地震,2012,28(2):133-143. |
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| 作者姓名： | 林建民 杨微 陈蒙 吴仁豪 葛洪魁 |
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| 作者单位： | 1. 浙江海洋学院,浙江省舟山市定海区文化路105号,316004
2. 中国地震局地球物理研究所,北京,100081 |
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| 基金项目： | 国家自然科学基金，浙江省教育厅科研项目，浙江海洋学院科研启动项目共同资助 |
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| 摘 要： | 给出了一种3分量地震数据偏振分析的技术,并将其应用到人工地震勘探信号的提取中。该技术基于时域算法,通过对协方差矩阵的本征分析,在滑动时间窗内计算偏振特性,由偏振椭圆导出表征质点运动的各种属性,并利用质点运动的特征构建偏振滤波器。本文对3分量合成地震记录和野外探测实验的实际3分量记录进行偏振分析研究,并在此基础上进行偏振滤波,有效地提高了信噪比。
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| 关 键 词： | 3分量地震记录 偏振分析 偏振滤波 |
| 收稿时间： | 2012/3/15 0:00:00 |
The application of polarization analysis in seismic signal detection |
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| Lin Jianmin,Yang Wei,Chen Meng,Wu Renhao and Ge Hongkui.The application of polarization analysis in seismic signal detection[J].Earthquake Research in China,2012,28(2):133-143. |
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| Authors: | Lin Jianmin Yang Wei Chen Meng Wu Renhao and Ge Hongkui |
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| Institution: | 1) Zhejiang Ocean University, Zhoushan 316004, China 2) Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| Abstract: | The paper introduces a method of polarization analysis and its application for seismic signal detection. This method is based on Flinn’s algorithm in time domain. Calculation of the data polarization characteristics can be done through calculating the eigenstructure of the covariance matrix in each moving data window. And the polarization filter is designed according to the characteristics of the particle motion to improve the signal to noise ratio (SNR) of the seismic record. Synthetic three-component seismic data and real data from field experiment have been applied and the filtered results show the high efficiency of this method. |
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| Keywords: | Three-component record Polarization analysis Polarization filter |
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