基于EEMD分解法对北武当观测站形变资料受气压干扰特征分析  

Analysis of the Disturbance Characteristics of Atmospheric Pressure on the Deformation Data of North Wudang Observation Station Based on EEMD Decomposition Method

作　　者：王晓霞[1,2] 高翠珍[1,2] 史双双[1,2] 薛锦明[1,2] 薛生瑞[1,2] WANG Xiaoxia;GAO Cuizhen;SHI Shuangshuang;XUE Jinming;XUE Shengrui(Taiyuan Earthquake Monitoring Center Station,Shanxi Seismological Bureau,Taiyuan 030025,China;Shanxi Seismological Bureau,Taiyuan 030021,China)

机构地区：[1]山西省地震局太原地震监测中心站,山西太原030025 [2]山西省地震局,山西太原030021

出　　处：《科技创新与生产力》2024年第7期94-96,共3页Sci-tech Innovation and Productivity

基　　金：山西省地震局科研项目(SBK—2308);中国地震局2023年监测、预报、科研三结合课题(3JH-202301010)。

摘　　要：本文通过选取北武当观测站的水平摆、伸缩仪,对观测数据受气压干扰明显的典型事件进行分析,研究气压变化如何对观测数据变化产生的影响,并对原始观测数据采用EEMD分解出含有干扰信息的IMF分量;对IMF分量进行Hilbert变换得出Hilbert时频图。结果表明,水平摆和伸缩仪受气压干扰明显,且气压干扰具有延时性。总之,通过EEMD方法对北武当观测站测向资料的分析,说明这种方法对气压干扰的研究有较好的效果,提高了识别干扰信息的能力。By selecting typical events with significant atmospheric pressure interference in the horizontal pendulum,water pipe instrument,and telescopic instrument observation data at the North Wudang Observation Station,this paper analyzes and studies how atmospheric pressure changes affect the observed data changes;using Set Empirical Mode Decomposition(EEMD)to extract the Intrinsic Mode Function(IMF)components containing interference information from the original observation data;performs Hilbert transform on the IMF components to obtain the Hilbert time-frequency map.The results show that the horizontal pendulum and telescopic instrument are significantly affected by air pressure interference,while the water pipe instrument is less affected by air pressure interference,and the air pressure interference has a time delay.In summary,the analysis of the direction finding data from the North Wudang Observation Station using the EEMD method shows that this method has a good effect on the study of atmospheric pressure interference and improves the ability to identify interference information.

关 键 词：形变资料 EEMD分解 气压 

分 类 号：P315.7[天文地球—地震学]