| 过套管电阻率测井仪信号调理电路的设计 |
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| 引用本文： | 耿敏.过套管电阻率测井仪信号调理电路的设计[J].科学技术与工程,2011,11(6). |
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| 作者姓名： | 耿敏 |
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| 作者单位： | 中国石油大学(北京)地球物理与信息工程学院,北京,102249 |
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| 摘 要： | 超低频、纳伏级信号的检测以及强干扰的抑制是过套管地层电阻率测井需要解决的关键问题。根据待测信号的特点，选用超低噪声、低漂移元器件，设计了相应的信号调理电路。测试结果表明，调理电路能有效抑制干扰信号、准确提取有用信号、实现了50nV信号的可靠测量。
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| 关 键 词： | 过套管电阻率测井仪，信号调理电路，低噪声前置放大，低通滤波 |
| 收稿时间： | 2010/12/6 0:00:00 |
| 修稿时间： | 2010/12/6 0:00:00 |
Design of Signal Conditioning Circuits for Cased-Hole Resistivity Logging Tool |
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| Geng Min.Design of Signal Conditioning Circuits for Cased-Hole Resistivity Logging Tool[J].Science Technology and Engineering,2011,11(6). |
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| Authors: | Geng Min |
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| Institution: | GENG Min,LIANG Hua-qing,CAO Xu-dong,YIN Hong-dong,ZHANG Xiao-liang(College of Geophysics and Information Engineering,China University of Petroleum-Beijing,Beijing 102249,P.R.China) |
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| Abstract: | As far as cased-hole formation resistivity logging, the key problems needed to be solved are detection of ultra-low frequency and extremely weak signals, as well as reduction of strong interferences. Based on the features of signals to be measured, the corresponding signal conditioning circuits are designed with the components of ultra-low noise and low distortion. Experimental results demonstrate that the signal conditioning circuits can reduce interference signals effectively, extract useful signals accurately and realize the reliable measurement of 50nV signal. |
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| Keywords: | cased-hole resistivity logging tool signal conditioning circuit low-noise pre-amplification low-pass filtering |
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