| 声波测井仪感应干扰的抑制 |
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| 引用本文： | 武洪涛. 声波测井仪感应干扰的抑制[J]. 石油天然气学报, 1995, 17(4): 91-95 |
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| 作者姓名： | 武洪涛 |
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| 作者单位： | 江汉石油学院地球物理勘探系 |
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| 摘 要： | 对声波测井仪传输线感应干扰机理的分析表明，降低线路阻抗有利于减小感应干扰、提高信号传输质量。利用电压并联负反馈电路作为仪器的前置放大器，可实现信号放大、阻抗匹配和降低线路阻抗的目的，电路简单、体积小。
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| 关 键 词： | 声波测井 电磁干扰 测井仪 |
Suppression of Inductive Interference from Sonic Logging Tools |
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| Wu Hongtao. Suppression of Inductive Interference from Sonic Logging Tools[J]. Journal of Oil and Gas Technology, 1995, 17(4): 91-95 |
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| Authors: | Wu Hongtao |
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| Abstract: | An analysis of the inductive interference mechanism of transmission system in sonic logging tools shows that a lower impedance of the transmission line is favourable for reducing inductive interference and raising signal/noise ratio. Utilizing parallel votage negative feedback circuits as a preamplifier it is possible to amplify signal and reduce circuit impedance as well as to simplify circuit and lessen volume. The prcamplifier can be sealed in a transducer. Simulated tests demonstrate that the above circuits may accomplish their lasks. |
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| Keywords: | sonic logging tool preamplifier transducer electromagnetic interference impedance signal/noise ratio |
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