基于EEMD方法的爆破振动信号去噪研究  

De-noising Technology for Blasting Vibration Signal Based on EEMD Method

作　　者：张树标[1] 王柳[1] 饶运章[2] 饶睿[1] 

机构地区：[1]赣州有色冶金研究所,江西赣州341000 [2]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《中国钨业》2015年第4期15-20,共6页China Tungsten Industry

基　　金：国家自然科学基金项目(51364010)

摘　　要：鉴于小波类去噪法存在小波基和分解层数的选择问题、EMD类去噪法受限于端点震荡和模态混叠效应,将EEMD方法引入,对爆破振动原始信号进行去噪研究。在EEMD分解的基础上,通过波形和频谱分析,得到IMF4~IMF8属于爆破振动真实信号分量,将其重构,获取了爆破振动真实波形。与EMD去噪法相比,EEMD去噪法避免了端点震荡和模态混叠效应的影响,不仅有效去除了噪声,还保留了爆破真实波形的真实性和完整性。EEMD method was introduced for the de-noising of blasting vibration signal, for the disadvantages of the two traditional de-noising methods, namely, choice of wavelet basis and decomposition level for the wavelet based de-noising method, endpoint shock and modal aliasing effects for EMD class de-noising. On the basis of EEMD decomposition, waveform and spectrum analysis determined that IMF4 -IMF8 were components of real blasting vibration signal. Real blasting vibration wave were obtained by reconstructing IMF4-IMF8 components. Compared with EMD de-noising method, EEMD De-noising method avoid the effects of the endpoint shock and mode mixing by effectively removing the noise and retaining the blast wave of real authenticity and integrity.

关 键 词：爆破振动信号 EMD EEMD 去噪 

分 类 号：TD235[矿业工程—矿井建设]