本文介绍了一种基于海底沉积物重力柱状取样器的新型原位声学一体化系统，名为海底沉积物原位声学与取样一体化系统(Sediment Acoustics and Sampling Integrated System，SASIS)，该系统可以为海底区域地声模型研究和海洋工程地质评价等提供重要数据和样品。SASIS水下结构主要包括声学测量单元和重力柱取样单元，其发射换能器、接收换能器与重力柱状取样器实现一体化集成。系统利用振动滑行纵波方式测量沉积物的声速和声衰减，声波主频为12 kHz、28 kHz可选，采用1发4收测量模式，在原位声学测量时可同步采集同一深度位置的沉积物样品。依托自然资源部第二海洋研究所-上海交通大学联合基金2023年度共享航次，SASIS在浙江舟山附近东海海域成功地进行了5站试验，试验站位水深约12。0 m，SASIS系统高效地同步采集了原位测量数据和沉积物样品。本文对沉积物声速和声衰减进行了初步数据分析，与前人测量数据、样品实验室声学测量结果对比表明，SASIS系统的原位声学数据可靠且有效。
Development of a New Integrated In-Situ Acoustic System Based on a Gravity Corer for Seabed Sediment Sampling
This paper presents the development of a new integrated in-situ acoustic system based on a gravity corer for seabed sediment sampling,named the sediment acoustics and sampling integrated system,SASIS.This system can provide important data and samples for research on acoustic models in submarine areas and the geological evaluation of marine engineering.The underwater structure of SASIS mainly includes an acoustic measurement unit and a gravity coring unit,integrating the transmitter,receiver,and gravity corer.The system measures the sound velocity and attenuation of the sediments using vibratory sliding compressional wave,with the main frequency of the sound wave being selectable between 12 kHz and 28 kHz,employing a 1-transmitter-4-receiver measurement mode.During in-situ acoustic measurements,sediment samples from the same location can be collected simultaneously.Supported by the joint fund of the Second Institute of Oceanography of the Ministry of Natural Resources and Shanghai Jiao Tong University for the shared voyage in 2023,SASIS was successfully tested at five stations near Zhoushan,East China Sea,Zhejiang.The water depth at the test sites was about 12.0m,and SASIS efficiently collected in-situ acoustic data and sediment samples simultaneously.This paper presents a preliminary data analysis of sediment sound velocity and attenuation.Comparisons with previous measurement data and laboratory acoustic measurements of samples show that the in-situ acoustic data from SASIS are reliable and effective.
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