基于混沌蚁群优化小波阈值法地磁信号噪声压制  

Suppression of Geomagnetic Signal Noise Based on Chaotic Ant Colony Optimization Wavelet Thresholding

作　　者：刘军[1,2] 陈磊 李文灿 孟宪武 刘郁聪 刘迪仁 徐学恭 方江雄[1,2] 杨凤[1] LIU Jun;CHEN Lei;LI Wen-can;MENG Xian-wu;LIU Yu-cong;LIU Di-ren;XU Xue-gong;FANG Jiang-xiong;YANG Feng(Engineering Research Center of Nuclear Technology Application(East China University of Technology),Ministry of Education,Nanchang 330013,China;School of Geophysics and Measurement-Control Technology,East China University of Technology,Nanchang 330013,China;Longyan Tobacco Industry Co.,Ltd.,Longyan 364000,China;Beijing Xinlong Instrument LTD.,Beijing 100101,China;Tianjin Earthquake Agency,Tianjin 300201,China)

机构地区：[1]东华理工大学核技术应用教育部工程研究中心,南昌330013 [2]东华理工大学地球物理与测控技术学院,南昌330013 [3]龙岩烟草工业有限责任公司,龙岩364000 [4]北京市京核鑫隆科技有限责任公司,北京100101 [5]天津市地震局,天津300201

出　　处：《科学技术与工程》2020年第25期10177-10181,共5页Science Technology and Engineering

基　　金：国家自然科学基金(61963002,61866001);东华理工大学核技术应用教育部工程研究中心开放基金(HJSJYB2015-13,HJSJYB2016-9,HJSJYB2016-1);江西省自然科学基金(20171BAB202028)。

摘　　要：地磁信号测量广泛应用于资源勘探、地质勘查和管线探测等领域。由于实际测量地磁信号易受到外界环境因素干扰,影响后期地磁数据资料解释。针对常规去噪算法需要获取噪声信号的统计特性,难以达到较好的去噪效果,基于混沌蚁群优化的小波阈值方法,将信号小波分解后,使用广义交叉验证函数选取阈值,结合混沌蚁群算法迭代寻优,确定最优阈值,进而实现地磁信号的噪声压制。通过对合成正弦信号和实测地磁信号进行去噪处理,与常用方法去噪法对比,本文方法去噪效果明显提升。Geomagnetic signal measurement is widely used in resource exploration,geological exploration and pipeline detection.However,the actual measurement of geomagnetic signals could be easily interfered by external environmental factors,the results would affect the interpretation of geomagnetic data for future application.In a conventional denoising algorithm,it is necessary to obtain the statistical characteristics of the noise signal,and difficult to achieve a better denoising effect.Therefore,the wavelet threshold method based on chaotic ant colony optimization was proposed.In the method,after the signal wavelet is decomposed,the generalized cross-validation function is used to select the threshold,the chaotic ant colony algorithm is used and iterated.Finally,the optimal threshold was optimized and determined,and noise suppression of geomagnetic signals was achieve.By denoising the synthetic sinusoidal signal and the measured geomagnetic signal,compared with the common method denoising method,the denoising effect of this method is obviously improved.

关 键 词：地磁信号 噪声 小波阈值法 混沌蚁群优化算法 

分 类 号：P631.2[天文地球—地质矿产勘探]