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一、概述浅地层剖面测量,又称水声探测,是根据声波传播原理,探测水下地层结构(即查明地层层次及厚度)的一种地球物理方法。浅地层剖面测量原理是:探测时,人工发射声脉冲,当声波向下传播遇到具有不同波阻抗分界面时,即产生反射,接收反射回来的微弱信号,经声——电转换,放大后予以记录。其工作原理如图1。
First, an overview of shallow section profile measurement, also known as acoustic detection, is based on the principle of sound wave propagation, detection of underwater stratigraphic structure (that is, stratigraphic level and thickness) of a geophysical method. The principle of shallow formation profile measurement is: when detecting, the artificial sound pulse is emitted, when the sound wave propagates downwards, it encounters the interface with different wave impedance interface, it will produce reflection and receive the weak signal reflected back. After acoustic-electric conversion, Be recorded. Its working principle shown in Figure 1.