摘要
分析了在四川省西昌数字测震台网"十五"项目中安装BBVS-60和CMG-3ESPC三分向宽频带地震计记录时遇到的零漂问题。通过实例证明了在一体化的地表观测房中,通过修建微型地下室构筑坑式摆墩的方法,能够有效解决由于环境变化产生的宽频带地震计记录时遇到的零漂问题,确保宽频带地震计正常记录工作。优点有:(1)满足了宽频带地震计对观测环境条件的要求;(2)大幅度降低了工程造价;(3)便于地震计维护;(4)有效地降低了地表噪声水平。
In order to reduce the zero shifts of digital seismographs,which are BBVS-60 and CMG-3ESPC,due to environmental affecting,we dig a deep chuckhole,in which an instrument frustum is constructed,in an observation house.We put the broadband digital seismometers on the instrument frustum.We then made a comparative test and got a satisfy result.Our test result indicate that installing BBVS-60 and CMG-3ESPC wide frequency range seismometer on the instrument frustum can effectively reduce the ground noise,ensured t...
出处
《四川地震》
2009年第1期20-24,共5页
Earthquake Research in Sichuan
