摘要
本文提出一种新的声波时差检测方法,即从两个接收信号的相位差中计算出声波时差。这种方法可以用来检测后续波的声波时差,可以避免首波幅度小的影响,使直接用硬件电路检测纵波、横波、斯通利波等后续波的传播速度成为可能。这种方法所需电路简单,抗干扰能力强,纵向分辨率高,有助于薄层的解释。
A new method for calculating acoustic travel time from phase difference between two-receiver signals is presented in this paper. The method can also be used to detect the slowness of late arrivals since the amplitude of first wave is too small. Thus direct detection of compressional wave, shear wave and Stonely wave velocities by hardware become possible. The circuitry required is simple and interference-free. Its vertical resolution is high. It is helpful for thin bed interpretation.
