| 反馈地震计低频扩展方法研究 |
| |
| 引用本文： | 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):429-432. |
| |
| 作者姓名： | 吕永清 周云耀 马 鑫 吴 欢 齐军伟 杜 兴 |
| |
| 摘 要： | 根据反馈地震计的反馈模型推导传递函数，并将其频率特征分解为低频端和高频端两部分。基于反馈模型中低频端频率特性的二阶高通滤波器传递函数，提出低频截止频率扩展的方法，包括降低机械固有角频率ω0、增加摆的质量m、降低灵敏度Sv、增大反馈线圈阻值或减少线径、选用更高电阻率的线圈材料、使用更弱的磁场。通过井下反馈地震计实验，验证了其低频端扩展与理论推导的一致性。
|
| 关 键 词： | 反馈地震计 传递函数 低频端扩展 |
Study on Low Frequency Expansion Method of Feedback Seismometers |
| |
| LU Yongqing,ZHOU Yunyao,MA Xin,WU Huan,QI Junwei,DU Xing.Study on Low Frequency Expansion Method of Feedback Seismometers[J].Journal of Geodesy and Geodynamics,2017,37(4):429-432. |
| |
| Authors: | LU Yongqing ZHOU Yunyao MA Xin WU Huan QI Junwei DU Xing |
| |
| 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, increase 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. |
| |
| Keywords: | feedback seismometer transfer function low frequency extension |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《大地测量与地球动力学》浏览原始摘要信息 |
| 点击此处可从《大地测量与地球动力学》下载免费的PDF全文 |
|
