海底沉积物声速-压力特性测试系统的设计与实验

文中设计基于可编程逻辑控制器(PLC)的测控平台、伺服加压控制、步进推动控制、多传感器测量、触摸屏交互等功能的温压可控声学测量系统,实现海底沉积物样品的孔隙水自动可控加压,通过声学测量功能单元测量海底沉积物在各个压力下的声速,模拟海底沉积物处于大陆坡2 000 m以浅海底表层任何深度变化时的声学特性测量,得到海底沉积物声速-压力特性,为校正实验室测量数据还原到海底原位测量数据提供一种方法。

Design and Experiment of the Velocity-Pressure Characteristic Testing System for Seafloor Sediments

This paper designs a temperature-pressure controllable acoustic measurement system based on the programmable logic controller (PLC) platform, servo pressure control, stepping drive control multi-sensor measurement, and touch screen interaction functions, and achieves automatic pressure control of pore water of seafloor sediments samples, so as to measure the sound velocity of seafloor sediments under various pressures through acoustic measurement function units. It simulates the measurement of acoustic characteristics of seafloor sediments which changes in any depth in shallow sea bottom surface on the continental slope shallower than 2000 m. Through experiments, this paper obtaineds the velocity-pressure characteristics of seafloor sediments, and thus provides a method for correcting laboratory testing data reduction to in-situ measurement data of sea floor.