大地测量与地球动力学2017，Vol.37Issue(4)：429-431,435,4.DOI:10.14075/j.jgg.2017.04.022
反馈地震计低频扩展方法研究
Study on Low Frequency Expansion Method of Feedback Seismometers
摘要
Abstract
The negative feedback seismometer transfer function of the feedback model is broken down into low-end and high-end of the frequency characteristics of the two parts.The low-end of the frequency characteristics of the second-order high-pass filter transfer function reveals low-frequency cutoff spreading methods.,reduce mechanical natural angular frequency ω0,increase the inertial mass,in crease the high frequency end of angular frequency ω0,reduce sensitivity Sv,increase the feedback coil resistance,reduce the diameter of the wire,use higher resistivity material coil,use a weaker magnetic field.We use the negative feedback downhole seismometer experiment to test the low end of its expansion and the theoretical derivation of consistency.关键词
反馈地震计/传递函数/低频端扩展Key words
feedback seismometer/transfer function/low frequency extension分类
天文与地球科学引用本文复制引用
吕永清,周云耀,马鑫,吴欢,齐军伟,杜兴..反馈地震计低频扩展方法研究[J].大地测量与地球动力学,2017,37(4):429-431,435,4.基金项目
Spark Program of Earthquake Technology of CEA,No.XH16028 （）
Director Fund of Institute of Seismology,CEA,No.IS201506211.中国地震局地震科技星火计划(XH16028) （XH16028）
中国地震局地震研究所所长基金(IS201506211). （IS201506211）
