虚拟密封在形变仪器降噪中的应用——以乌加河台SS-Y型伸缩仪为例  

Application of Virtual Sealing in Noise Reduction of Deformation Instrument:Using SS-Y Tensometer at Wujiahe Station as an Example

作　　者：胡玮 冯雪东 贾昊东 石伟 包文超 HU Wei;FENG Xuedong;JIA Haodong;SHI Wei;BAO Wenchao(Bayannur Earthquake Monitoring Center Station,2 West-Shuguang Street,Bayannur 015000,China;Inner Mongolia Seismic Station,80 Jirem Road,Hohhot 010010,China)

机构地区：[1]巴彦淖尔地震监测中心站,内蒙古自治区巴彦淖尔市015000 [2]内蒙古地震台,呼和浩特市010010

出　　处：《大地测量与地球动力学》2025年第2期203-207,共5页Journal of Geodesy and Geodynamics

基　　金：内蒙古自治区地震局局长基金(2023QN26)。

摘　　要：通过计算乌加河地震台SS-Y型伸缩仪采取密封措施前后数据的一阶差分、功率谱密度和均方根误差,研究其时频特征,并设计虚拟密封滤波器。结果表明,虚拟密封滤波后,0.07~0.5 min^(-1)的噪声信号抑制明显,达到了安全降噪的目的,对提高观测精度有一定的借鉴意义。We calculate the first-order difference,power spectral density and root mean square error and study its time-frequency of SS-Y extensometer data before and after the sealing measures at Wujiahe seismic station,design a virtual sealed filter.The results show that after the virtual seal filter,the noise signal of 0.07 to 0.5 min^(-1) is obviously suppressed,and the purpose of safe noise reduction is achieved,which has certain reference significance for improving the observation accuracy.

关 键 词：伸缩仪 密封 噪声 虚拟密封 

分 类 号：P315[天文地球—地震学]