宽城台体应变更换探头前后观测资料对比分析  

Comparative Analysis of Observational Data Before and After the Replacement of the Strain Probe at Kuancheng Station

作　　者：王嘉琦 王晓霞 夏英培 杨东辉 袁国旭[1] WANG Jiaqi;WANG Xiaoxia;XIA Yingpei;YANG Donghui;YUAN Guoxu(Chengde Earthquake Monitoring Center Station of Hebei Earthquake Agency,Chengde,Hebei 067000,China)

机构地区：[1]河北省地震局承德地震监测中心站,河北承德067000

出　　处：《山西地震》2024年第2期14-18,共5页Earthquake Research in Shanxi

摘　　要：通过对宽城台体应变观测系统更换探头前后的资料进行比较分析,旨在评估探头更换对观测系统稳定性和数据准确性的影响。相对噪声水平计算、M_(2)波潮汐因子相对中误差计算和功率谱密度特征分析等多方法研究结果显示,探头更换后,体应变的相对噪声水平增加,M_(2)波潮汐因子中误差增加3倍,时频分析结果也表明噪声水平提高,统计指标变化显著,这些变化表明探头更换可能会导致观测系统的稳定性和资料准确性降低。该研究结果对于台站在进行探头更换时采取有效措施,以减小其对观测数据准确性的影响有一定的参考意义。By comparing and analyzing the data before and after the replacement of the strain probe in the Kuancheng Station's strain observation system,the study aims to evaluate the impact of probe replacement on the stability and data accuracy of the observation system.Results from multiple methods,including calculations of relative noise levels,relative errors of the M_(2)tidal factor,and power spectral density characteristics analysis,show that after the probe replacement,the relative noise level of the strain increased,the median error of the M_(2)tidal factor tripled,and time-frequency analysis results also indicated increased noise levels with significant changes in statistical indicators.These changes suggest that probe replacement could lead to decreased stability and accuracy of the observation system.These findings are meaningful for taking effective measures during probe replacement at stations to minimize its impact on the accuracy of observational data.

关 键 词：体应变 潮汐因子 小波变换 时频分析 

分 类 号：P315.63[天文地球—地震学]