基于小波变换模极大值恢复的地磁信号处理  

Geomagnetic Signal Processing Based on Wavelet Transform Modulus Maximum Recovery

作　　者：刘檀 朱音杰[1,2] 王加敏 牛淑瑜 刘静 LIU Tan;ZHU Yinjie;WANG Jiamin;NIU Shuyu;LIU Jing(Hebei Hongshan National Observatory on Thick Sediments and Seismic Hazards,Hebei Xingtai 054000,China;Hebei Earthquake Agency,Hebei Shijiazhuang 050000,China)

机构地区：[1]河北红山巨厚沉积与地震灾害国家野外科学观测研究站,河北邢台054000 [2]河北省地震局,河北石家庄050000

出　　处：《防灾减灾学报》2023年第2期47-51,共5页Journal of Disaster Prevention And Reduction

基　　金：河北省地震局监测、预报、科研三结合课题项目(DZ201702)。

摘　　要：由于仪器设备、环境和人为因素,地磁数据信号在采集和传输过程中不可避免地要受到一定的影响,因此,如何消除信号中的干扰影响,并获得准确有用的数据信息非常重要。基于Mallat交替投影算法精确地对黄壁庄地震台2017年部分地磁数据进行了信号重构,结果表明:利用小波变换模极大值重建信号的交替投影方法重建地磁信号,可以提高地磁数据的质量,降低干扰对数据的影响。Due to the equipment,environment and human factors,geomagnetic data signal in the acquisi⁃tion and transmission process will inevitably be affected by noise.Therefore,how to eliminate the noise in the signal and obtain accurate and useful data information is very important.Mallat alternate projection algo⁃rithm is used to reconstruct geomagnetic signals accurately.The results show that the alternating projection method of wavelet transform modulus maxima reconstruction signal is used to reconstruct the geomagnetic signal,which improves the quality and accuracy of geomagnetic data,and reduces the influence of inter⁃ference on the data.

关 键 词：小波变换 模极大值 替代投影 信号重建 

分 类 号：P315.72[天文地球—地震学]