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本文论述了岩体声波穿透信号的数字处理方法及原理。用快速富氏分析提取信号振幅谱及相位谱,用希尔伯特变换提取包络、瞬时频率和相位,并在此基础上定量评价岩体吸收衰减特性。笔者提出用相关分析方法提取岩体声波信号的横波及纵波速度,这就为计算岩体动弹性模量、泊桑比等一系列动力学参数提供了可靠数据。最后简单介绍了声波穿透信号及人工合成声波记录数字处理实例。
This paper discusses the digital processing methods and principles of rock sound wave penetration signals. The Fourier spectrum analysis was used to extract the signal amplitude spectrum and phase spectrum. The Hilbert transform was used to extract the envelope, instantaneous frequency and phase. Based on this, the rock mass absorption and attenuation characteristics were quantitatively evaluated. The author proposes to extract the transverse wave and P-wave velocity of rock acoustic wave signals by correlation analysis method, which provides reliable data for calculating a series of dynamic parameters such as dynamic elastic modulus and Poisson’s ratio of rock mass. Finally, the digital processing examples of acoustic wave penetration signals and synthetic acoustic wave recordings are briefly introduced.