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。
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.
出处
《桂林理工大学学报》
CAS
1986年第4期375-380,共6页
Journal of Guilin University of Technology
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
electrical prospecting
induced polarization
complex impedance measurements
spectra
data acquisition
data smoothing
spline approximation
discrete systems/time domain
frequency domain
