| 地电场观测中城市轨道交通干扰剔除 |
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| 引用本文： | 冯红武,颜文华,王建昌,闫俊义.地电场观测中城市轨道交通干扰剔除[J].地震地磁观测与研究,2019,40(3):70-78. |
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| 作者姓名： | 冯红武 颜文华 王建昌 闫俊义 |
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| 作者单位： | 中国西安 710068 陕西省地震局;中国西安 710068 陕西省地震局;中国西安 710068 陕西省地震局;中国西安 710068 陕西省地震局 |
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| 基金项目： | 中国地震局地震科技星火计划（项目编号：XH17035YSX）；陕西省地震局启航与创新基金（项目编号：QC201710） |
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| 摘 要： | 应用基于EMD的小波阈值去噪方法,去除地电场观测资料中轨道交通干扰,并将小波阈值去噪法和EMD去噪法的效果相比较,结果表明:该方法能够滤除地电场信号中的地铁干扰,同时保留原始信号中微小的突变,突出有用信息,提高地电场台站观测数据的使用率,有较好的去噪效果。基于EMD的小波阈值去噪方法可推广到其他地球物理观测资料的去噪分析,甚至地电场与地电阻率同场地观测中人工供电干扰信号的剔除。
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| 关 键 词： | 地电场 经验模态分解 城市轨道交通 小波阈值 信噪比 |
Interference elimination generated by urban track traffic during the geoelectric field observation |
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| Feng Hongwu,Yan Wenhua,Wang Jianchang,Yan Junyi.Interference elimination generated by urban track traffic during the geoelectric field observation[J].Seismological and Geomagnetic Observation and Research,2019,40(3):70-78. |
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| Authors: | Feng Hongwu Yan Wenhua Wang Jianchang Yan Junyi |
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| Institution: | Shaanxi Earthquake Agency, Xi'an 710068, China |
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| Abstract: | Based on empirical mode decomposition(EMD), a wavelet threshold denoising is applied to solve the signal denoising problem of geoelectric field data disturbed by urban track traffic in this paper. This method can eliminate most subway interference noise, keep minimal change of the original signal, highlight useful information in the original signal and improve the efficiency of geoelectric field data observed by the stations with the best denoising effect. As a new denoising method, the wavelet threshold denosing method based on EMD can be generalized to other precursory observation data denoising, such as the elimination of the artificial power supply interference noise from geoelectric and geoelectric resistivity observation in the same field. |
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| Keywords: | geoelectric field empirical mode decomposition urban track traffic wavelet threshold signal to noise ratio |
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