| 复阻抗谱数据采集与预处理方法 |
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| 引用本文： | 刘代志. 复阻抗谱数据采集与预处理方法[J]. 桂林工学院学报, 1986, 0(4) |
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| 作者姓名： | 刘代志 |
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| 作者单位： | 中南工业大学 |
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| 摘 要： | 以双频方波作为复阻抗系统的激励(输入信号)。对时域输入和输出信号进行离散采样,作傅氏变换求得电流和电压信号之实、虚分量(或振幅、相位)谱。用电压谱与电流谱作复数除法(归一),获得复阻抗谱。用“周期分段”法或“随机分段”法作时域信号平滑预处理;用三次样条拟合作频域信号平滑预处理。
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| 关 键 词： | 电法勘探 激发极化法 复阻抗测量 频谱 数据获得 数据平滑 样条逼近 离散系统/时间域 频率域 |
THE DATA ACQUISITION AND DATA PREPROCESSING OF IP COMPLEX IMPEDANCE SPECTRUM MEASUREMENTS |
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| Liu Daizhi. THE DATA ACQUISITION AND DATA PREPROCESSING OF IP COMPLEX IMPEDANCE SPECTRUM MEASUREMENTS[J]. Journal of Guilin University of Technology, 1986, 0(4) |
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| Authors: | Liu Daizhi |
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| Affiliation: | Central South University of Technology |
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| Abstract: | A double frequency square-wave is used as the excitation(input signal)to a complex impedance system. The discrete sampling is implemented tothe input and output signals in time domain, and then Fourier trans-form is carried out to get the spectra of the real and imaginary part(or amplitude and phase) of the electric current and voltage signals.Complex division (normalization) is made with the current and voltagespectra to get the complex impedance spectrum. "Dividing-part in cycle"or "random dividing-part" method is used in time-domain smoothing pre-processing, and the cubic spline fit in frequency-domain smoothing preprocessing. |
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| Keywords: | electrical prospecting induced polarization complex impedance measurements spectra data acquisition data smoothing spline approximation discrete systems/time domain frequency domain |
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