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| 广域电磁仪中的双T陷波器的优化设计 | |
| 引用本文： | 黄丹,裴婧,蒋奇云. 广域电磁仪中的双T陷波器的优化设计[J]. 物探与化探, 2011, 35(5): 626-629 |
| 作者姓名： | 黄丹 裴婧 蒋奇云 |
| 作者单位： | 中南大学信息物理工程学院,湖南长沙,410083 |
| 摘 要： | 分析了双T陷波器电路,推导出了传递函数、中心频率、带宽和Q值的表达式,通过计算、分析及仿真,针对广域电磁仪信号的特性及对工频电信号干扰的压制要求,对电阻和电容的取值进行了优化选择。实验表明优化设计的双T陷波器在带宽仅为3.62时,最低压制深度达-31.9 dB,不仅保留了有效信号,而且能最大限度地滤除工频及其谐波干扰噪声。 |
| 关 键 词： | 广域电磁仪 工频干扰 双T陷波器 |
OPTIMIZED DESIGN OF TWIN-T NOTCH FILTER IN WIDE FIELD ELECTROMAGNETOMETER |
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| HUANG Dan,PEI Jing,JIANG Ql-yun. OPTIMIZED DESIGN OF TWIN-T NOTCH FILTER IN WIDE FIELD ELECTROMAGNETOMETER[J]. Geophysical and Geochemical Exploration, 2011, 35(5): 626-629 | |
| Authors: | HUANG Dan PEI Jing JIANG Ql-yun |
| Affiliation: | HUANG Dan,PEI Jing,JIANG QI-yun (School of Info-physics & Geomatic Engineering,Central South University,Changsha 410083,China) |
| Abstract: | This paper analyzed the twin-T notch filter circuit,deduced the expressions of transfer function,center frequency,bandwidth and Q value.Through calculation,analysis and simulation,the optimal resistance and capacitance were selected for the characteristics of wide field electromagnetic signal and the suppression requirements of frequency interference.Experiments show that the optimal design of twin-T notch filter's minimum depth of suppression is-31.9 dB when the bandwidth is only 3.62,so the application of... |
| Keywords: | wide field electromagnetometer frequency interference twin-T notch filter |
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