| 低频交流电法的试验和研究 |
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| 引用本文： | 桂燮泰,戴经安,关华平.低频交流电法的试验和研究[J].西北地震学报,1988,10(2):22-28. |
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| 作者姓名： | 桂燮泰 戴经安 关华平 |
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| 作者单位： | 国家地震局分析预报中心
(桂燮泰，戴经安)，国家地震局分析预报中心(关华平) |
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| 摘 要： | 本文介绍了关于低频交流电法的试验和研究结果: (1) 现场观测证实,低频交流电法与直流电法观测的电阻率数据(包括ρ,曲线变化)是同步的和相近的。(2) 交流电法的抗干扰(噪声)能力比直流电法有所增强。采用交流电法守将干扰(噪声)背景由通常的100μv压低到10μv,並可以完全消除风扰。(3) 采用交流电法可以提高观测精度,其观测精度为10~(-3)(直流电法精度为10~(-2),还可有效地分辨1—2%的地电前兆异常。(4) 探测同样深度,交流电法可比直流电法功耗减少一倍。
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| 收稿时间： | 1987/7/9 0:00:00 |
EXPERIMENT AND DISCUSSION ON THE LOWFREQUENCY A.C. METHOD |
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| Gui Xietai,Dai Jingan and Guan Huaping.EXPERIMENT AND DISCUSSION ON THE LOWFREQUENCY A.C. METHOD[J].Northwestern Seismological Journal,1988,10(2):22-28. |
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| Authors: | Gui Xietai Dai Jingan and Guan Huaping |
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| Institution: | Center for Analysis and Prediction, State Seismological Bureau,Center for Analysis and Prediction, State Seismological Bureau and Center for Analysis and Prediction, State Seismological Bureau |
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| Abstract: | A. C. Method began to be applied in the geoelectrical observations by using a set of equipments of type Mark-4 with accuracy of 10-3 in 1976, The results of experimental observations in terms of A. C. Method are presented in this paper as the following:(1) The results from A. C. and D. C. method are agreeable.(2) Signal-to-noise ratio can be increased in one digit number.(3) The accuracy of A. C. method is 10-3 but D. C. method is 10-2. The resistivity anomalous of precursor phenomena up to 1-2% may be determined.(4) For same depth, power consumption may be decreased by A. C. method. |
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