Design and Experiment of In-situ Layered Acoustic Measurement Simulator
[Objective]In order to study the measurement characteristics of the in-situ survey device and the changing mechanism of the acoustic properties of seafloor sediments in different environments,this paper designed a seafloor in-situ layered acoustic survey simulator.[Method]The device was mainly composed of three parts:a hierarchical motion control unit,an acoustic measurement unit and a computer control unit.The electric cylinder controlled the hierarchical positioning motion and continuous motion of the acoustic measurement probe rod to realize the accuracy analysis of the motion of the acoustic measurement probe rod;By measuring and calibrating in water,the corrected distance difference and diffusion attenuation coefficient of the acoustic measurement probe of the device were obtained;by simulating in-situ layered acoustic measurement experiments,the acoustic properties of different types of seabed sediments were measured.[Results and Conclusions]The corrected distance difference between the acoustic measurement probe rods is 77.14 mm,and the average diffusion attenuation coefficient of the sound wave emitted by this device is(34.30±0.46)dB/m;the motion control accuracy of the acoustic measurement probe is sufficient,and it can accurately move into different layers for layered measurement of acoustic properties.Both positioning measurement and continuous measurement can obtain reliable experimental data.
国家科技期刊平台
NSTL
万方数据
