华南地震2025，Vol.45Issue(4)：34-41,8.DOI:10.13512/j.hndz.2025.04.05
加速度计与地震计同台基记录背景噪声特征对比研究
A Comparative Study on the Characteristics of Background Noise Recorded by Collocated Accelerometers and Seismometers
摘要
Abstract
This study utilizes observational data from collocated accelerometers and seismometers at 61 earthquake early warning reference stations in Inner Mongolia.Under the assumption of negligible seismometer self-noise,a comparative analysis was performed using the probability density function(PDF)method to investigate the characteristics of background noise in terms of root mean square(RMS),power spectral density(PSD),and PDF.The results indicate that in the high-frequency band,variations in accelerometer RMS are strongly correlated with instrument models,whereas seismometer RMS variations are more closely linked to local environmental conditions.Moreover,accelerometer RMS values consistently exceed those of seismometers at the same station,which is primarily attributable to the higher intrinsic self-noise of accelerometers.In the mid-to-low frequency bands,seismometers demonstrate a superior capability in recording background noise,while accelerometers lack such capacity;both instruments exhibit relatively concentrated PSD distributions in the mid-frequency range.In the low-frequency band,seismometer performance is significantly affected by the velocity measurement principle,whereas accelerometers,which measure acceleration,remain unaffected.Analysis of instrument self-noise reveals a hierarchical pattern,with TDA-33M accelerometers exhibiting the lowest self-noise,followed by JS-A2,and QA-2g showing the highest noise levels.Consequently,this study recommends that future accelerometer designs prioritize the reduction of self-noise.关键词
加速度计/地震计/RMS/PSD/背景噪声Key words
Accelerometer/Seismometer/RMS/PSD/Background noise分类
天文与地球科学引用本文复制引用
安全,张荣莲,贾鹏,哈斯塔娜..加速度计与地震计同台基记录背景噪声特征对比研究[J].华南地震,2025,45(4):34-41,8.基金项目
内蒙古自治区地震局局长基金(2023MS08) （2023MS08）
地震监测预警课题(CEA-JCYJ-202502002)联合资助. （CEA-JCYJ-202502002）
