应用FIR滤波器消除天津数字地震记录中的干扰  

Application of FIR Filter to Eliminate the Interference in the Digital Seismic Records of Tianjin

作　　者：许可[1] 刘瑞瑞[1] 孔繁旭[1] 朱宏[1] 

机构地区：[1]天津市地震局,天津300201

出　　处：《华南地震》2015年第3期102-107,共6页South China Journal of Seismology

基　　金：天津市地震局科研项目(20131012)资助

摘　　要：数字地震记录中包含大量的干扰信号,影响数据质量,需要加以排除。针对天津数字地震记录中存在的干扰信号,介绍了FIR数字滤波器的原理与方法,并详细阐述了利用汉宁窗函数的带阻滤波器、高通滤波器滤除天津数字地震记录中的干扰,从而达到突出地震信号特征、消除干扰的目的。实践表明:这种方法设计简单、方便、实用性强、具有良好的效果。Digital seismic records contain a lot of interference signal, which affects the data quality and needs to be ruled out. To solve the interference signal existing in the digital seismic records of Tianjin, this paper introduces the principle and method of FIR digital filter, and expounds in detail on the use of hanning window function of band-stop filter, filter high-pass filter interference in the digital seismic records of Tianjin, so as to prominent the seismic signal characteristics and eliminate interference. Practice shows that this method is simple, convenient and practical design, and has good effect.

关 键 词：数字地震记录 FIR数字滤波器 消除干扰 窗函数 

分 类 号：P315.62[天文地球—地震学]