吉林大学学报(地球科学版) ›› 2017, Vol. 47 ›› Issue (3): 874-883.doi: 10.13278/j.cnki.jjuese.201703301
蔡剑华1, 肖晓2
Cai Jianhua1, Xiao Xiao2
摘要: 针对矿集区大地电磁(MT)信号受环境噪声和人文噪声污染严重的问题,提出一种结合了经验模态分解(EMD)和数学形态学滤波的组合滤波方法,对矿集区大地电磁信号的时域信号进行滤波处理。介绍了方法原理和计算步骤,评估了该方法的去噪效果;在与小波变换去噪效果对比的基础上,用仿真实验验证了方法的可靠性,并对某矿集区的实测数据进行了去噪处理。结果表明,组合滤波方法充分利用了EMD多尺度分解及其可重构特性和数学形态学滤波方法的优点,在滤除噪声的同时为MT信号尽可能多地保留了有用信息。去噪后,估算的响应曲线方差减小到原来的一半,为进一步正确资料处理和地质解释提供了保障。
中图分类号:
[1] Szarka. Geophysical Aspects of Man-Made Electro-magnic Noise in the Earth Review[J].Geophysics,1988,9:287-318. [2] 汤井田,李灏,李晋,等.Top-hat变换与庐枞矿集区大地电磁强干扰分离[J].吉林大学学报(地球科学版),2014,44(1):336-343. Tang Jingtian,Li Hao,Li Jin,et al.Top-Hat Transformation and Magnetotclluric Sounding Data Strong Interference Separation of Luzong Ore Concentration Area[J].Journal of Jilin University(Earth Science Edition),2014,44(1):336-343. [3] 汤井田,李晋,肖晓,等.数学形态滤波与大地电磁噪声压制[J].地球物理学报,2012,55(5):1784-1793. Tang Jingtian,Li Jin,Xiao Xiao,et al.Mathematical Morphology Filtering and Noise Suppression of Magnctotclluric Sounding Data[J].Chinese Journal of Geophysics,2012,55(5):1784-1793. [4] 朱威,范翠松,姚大为,等.矿集区大地电磁噪声场源分析及噪声特点[J]. 物探与化探,2011,35(5):658-662. Zhu Wei,Fan Cuisong,Yao Dawei,et al.Noise Source Analysis and Noise Characteristics Study of MT in an Ore Concentation Area[J].Geophysical and Geochemical Exploration,2011,35(5):658-662. [5] 蔡剑华,汤井田,王先春.基于经验模态分解的大地电磁资料人文噪声处理[J]. 中南大学学报(自然科学版), 2011,42(6):1786-1790. Cai Jianhua,Tang Jingtian,Wang Xianchun.Human Noise Elimination for Magnetotelluric Data Based on Empirical Mode Decomposition[J]. Journal of Central South University (Science and Technology),2011,42(6):1786-1790. [6] Cai J H, Tang J T,Hua X R.An Analysis Method for Magnetotelluric Data Based on the Hilbert-Huang Transform[J]. Exploration Geophysics,2009,40: 197-205. [7] Oliver R,Junge A,Dawes J K.New Equipment and Processing for Magnetotelluric Remote Reference Observations [J].Geophys,1998,132:535-548. [8] Suto N,Harada M, Izutsu J. Time Variation of the Electromagnetic Transfer Function of the Earth Estimated by Using Wavelet Transform[J]. Proc Jpn Acad: Ser B, 2006,82: 175-180. [9] Trad D O, Travassos J M. Magnetotelluric Data Ana-lysis: Robust Filter in Discrete Wavelet Analysis[C]//13th Workshop on Electromagnetic Induction in the Earth. Hokkaido: [s. n.], 1996: paper 7.13. [10] 宗永涛,沈艳霞,纪志成.基于改进的形态学滤波和EEMD方法的滚动轴承故障诊断[J]. 江南大学学报(自然科学版),2015,14(5):533-537. Zong Yongtao,Shen Yanxia, Ji Zhicheng. Fault Diagnosis for Rolling Bearing Based on the Improved Morphological Filter and EEMD Method[J]. Journal of Jiangnan University (Natural Science Edition),2015,14(5):533-537. [11] 蔡剑华,胡惟文,王先春. 基于组合滤波的鱼油二十碳五烯酸含量近红外光谱检测[J].农业工程学报,2016,32(1):312-317. Cai Jianhua,Hu Weiwen,Wang Xianchun.Near-Infrared Spectrum Detection of Fish Oil Eicosapentaenoic Acid Content Based on Combinational Filtering[J].Transactions of the Chinese Society of Agricultural Engineering,2016,32(1):312-317. [12] Huang N E, Shen Z, Long S R, et al. The Empirical Mode Decomposition and the Hilbert Spectrum for Nonlinear and Non-Stationary Time Series Analysis[J]. Proceedings of the Royal Society of London Series A,1998,454:903-998. [13] 蔡剑华, 熊锐.基于频率切片小波变换的时频分析与MT信号去噪[J].石油物探,2016,55(6):904-912. Cai Jianhua,Xiong Rui.Magnctotclluric Data De-Nosing Based on Time-Frequency Analysis of the Frequency Slice Wavelet Transform[J].Geophysical Prospecting for Petrolcum,2016,55(6):904-912. [14] 蔡剑华,肖晓.基于小波自适应阈值去噪的MT信号处理方法[J].地球物理学进展,2015,30(6):2433-2439. Cai Jianhua, Xiao Xiao.Method of Processing Magnetotelluric Signal Based on the Adaptive Threshold Wavelet[J].Progress in Geophysics,2015,30(6):2433-2439. [15] Donoho D L.De-Noising by Soft-Shresholding[J].IEEE Transactions on Information Theory,1995,41:613-627. [16] 黄进文,王威廉.平滑滤波对 ECG的R波幅值影响研究[J].云南大学学报, 2008,30 (6):559-563. Huang Jinwen,Wang Weilian.Research on the Effect of R-Peak in ECG Wave by Smoothing Filtering[J].Journal of Yunnan University,2008,30 (6):559-563. [17] 刘鹏,庞澄清,吕颖.改进平滑滤波算法在车辆组合导航系统中的仿真研究[J]. 机械与电子,2016,34(1):24-27. Liu Peng,Pang Chengqing,Lü Ying. Simulation Study of Smoothing Filtering Algorithm in Vehicle Navigation System[J]. Machinery & Electronics,2016,34(1):24-27. [18] 蔡剑华,王先春. 基于经验模态分解的近红外光谱预处理方法[J].光学学报,2010,3(1):267-271. Cai Jianhua,Wang Xianchun. Near Infrared Spectrum Pretreatment Based on Empirical Mode Decomposition[J]. Acta Optica Sinica,2010,3(1):267-271. [19] 蔡剑华,龚玉蓉,王先春.基于Hilbert-Huang变换的大地电磁测深数据处理[J]. 石油地球物理勘探,2009,10(5):617-620. Cai Jianhua, Gong Yurong,Wang Xianchu.Magnetotelluric Data Processing Based on Hilbert-Huang Transform[J]. Oil Geophysical Prospecting,2009,10(5):617-620. [20] 李夕兵,张义平,刘志祥,等.爆破震动信号的小波分析与HHT变换[J].爆炸与冲击,2005,25(6):528-535. Li Xibing,Zhang Yiping,Liu Zhixiang,et al.Wavelet Analysis and Hilbert-Huang Transform of Blasting Vibration Signal[J].Explosion and Shock Waves,2005,25(6):528-535. [21] 蔡剑华,王先春.基于Teager-Huang的滚动轴承故障诊断方法[J]. 机械设计, 2012,29(7): 54-58. Cai Jianhua,Wang Xianchun.Rolling Bearing Fault Diagnosis Method Based on Teager Huang transform[J].Journal of Machine Design,2012,29(7):54-58. [22] 李继业,武晓军,刘长生. 前兆观测干扰信号频谱特征分析[J].中国地震,2015,31(3):574-583. Li Jiye,Wu Xiaojun,Liu Changsheng. Analysis of Frequency Spectrum Characteristics of Disturbed Signal in Earthquake Precursory Observation[J]. Earthquake Research in China,2015,31(3):574-583. |
[1] | 张聪, 石砥石, 张子亚, 陈科, 苑坤, 乔计花, 彭芳苹. 云南楚雄盆地西部高精度重磁电特征及基底特征[J]. 吉林大学学报(地球科学版), 2018, 48(3): 863-871. |
[2] | 徐泰然, 卢占武, 王海燕, 李洪强, 李文辉. 深地震反射剖面揭示的西藏娘热矿集区上地壳结构[J]. 吉林大学学报(地球科学版), 2018, 48(2): 556-565. |
[3] | 陈辉, 尹敏, 殷长春, 邓居智. 大地电磁三维正演聚集多重网格算法[J]. 吉林大学学报(地球科学版), 2018, 48(1): 261-270. |
[4] | 杨凤超, 宋运红, 赵玉岩. 辽宁盘岭矿集区花岗岩锆石SHRIMP U-Pb年龄、Hf同位素组成及地质意义[J]. 吉林大学学报(地球科学版), 2017, 47(5): 1429-1441. |
[5] | 项新葵, 尹青青, 詹国年, 曲凯, 刘行, 谭荣, 钟波. 江西大湖塘北区石门寺矿段钨矿成矿条件与找矿预测[J]. 吉林大学学报(地球科学版), 2017, 47(3): 645-658. |
[6] | 张艳, 韩润生, 魏平堂, 邱文龙. 云南会泽矿山厂铅锌矿床流体包裹体特征及成矿物理化学条件[J]. 吉林大学学报(地球科学版), 2017, 47(3): 719-733. |
[7] | 罗天涯, 熊彬, 蔡红柱, 陈欣, 刘云龙, 兰怀慷, 李祖强, 梁卓. 复杂电性结构大地电磁二维响应特征[J]. 吉林大学学报(地球科学版), 2017, 47(1): 215-223. |
[8] | 张朋, 杨宏智, 李斌, 寇林林, 杨凤超. 辽东青城子矿集区姚家沟钼矿床成矿物质来源、成矿年代及成矿动力学背景[J]. 吉林大学学报(地球科学版), 2016, 46(6): 1684-1696. |
[9] | 韩松, 刘国兴, 韩江涛. 华南地区进贤-柘荣剖面深部电性结构[J]. 吉林大学学报(地球科学版), 2016, 46(6): 1837-1846. |
[10] | 严家斌, 皇祥宇. 大地电磁三维矢量有限元正演[J]. 吉林大学学报(地球科学版), 2016, 46(5): 1538-1549. |
[11] | 陈随海, 韩润生, 申屠良义, 吴鹏, 邱文龙, 文德潇. 滇东北矿集区昭通铅锌矿区蚀变岩分带及元素迁移特征[J]. 吉林大学学报(地球科学版), 2016, 46(3): 711-721. |
[12] | 朱凯光, 李玥, 孟洋, 王凌群, 谢宾, 程宇奇. 最小噪声分离在航空电磁数据噪声压制中的应用[J]. 吉林大学学报(地球科学版), 2016, 46(3): 876-883. |
[13] | 崔永福, 李国发, 吴国忱, 尚帅, 赵锐锐, 罗莉莉. 基于面波模拟和曲波变换的去噪技术[J]. 吉林大学学报(地球科学版), 2016, 46(3): 911-919. |
[14] | 秦喜文, 刘媛媛, 王新民, 董小刚, 张瑜, 周红梅. 基于整体经验模态分解和支持向量回归的北京市PM2.5预测[J]. 吉林大学学报(地球科学版), 2016, 46(2): 563-568. |
[15] | 韩润生, 李波, 倪培, 邱文龙, 王旭东, 王天刚. 闪锌矿流体包裹体显微红外测温及其矿床成因意义——以云南会泽超大型富锗银铅锌矿床为例[J]. 吉林大学学报(地球科学版), 2016, 46(1): 91-104. |
|