丰宁台FHD仪背景噪声减小措施分析  

Analysis of Background Noise Reduction Measures of FHD Instrument in Fengning Station

作　　者：李庆武[1] 胡秀娟[2] 张玉林[1] 郭亚亚[1] 陈立强[1] 孙彭涛[1] Li Qing-wu;Hu Xiu-juan;Zhang Yu-lin;Guo Ya-ya;Chen Li-qiang;Sun Peng-tao(Chengde Seismic Station,Hebei Earthquake Agency,Chengde,Hebei 067000,China;Hongshan Reference Seismic Station,Hebei Earthquake Agency,Xingtai,Hebei 054000,China)

机构地区：[1]河北省地震局承德地震台,河北承德067000 [2]河北省地震局红山基准地震台,河北邢台054000

出　　处：《山西地震》2019年第4期48-51,共4页Earthquake Research in Shanxi

摘　　要：针对丰宁台FHD仪记录曲线毛刺较多、背景噪声偏大的问题,对观测环境、供电、信号线、仪器自身性能等逐一排查,发现主要是受交流供电干扰和信号线过长的影响。经过处理后,降低了背景噪声,提高了观测的精度。通过该分析,总结出降低FHD仪背景噪声的部分经验,有望在其他地磁台站推广应用。In view of the problems of many burrs and large background noise in the recording curve of the FHD instrument in Fengning station,the observation environment,power supply,signal line and the performance of the instrument were checked one by one,and it was found That the recording was mainly affected by the interference of AC power supply and the long signal line.After processing,the background noise is reduced and the observation accuracy is improved.Based on this analysis,some experience of reducing the background noise of FHD instrument is summarized,which is expected to be applied in other geomagnetic stations.

关 键 词：FHD仪 背景噪声 影响因素 

分 类 号：P315.62[天文地球—地震学]