海底底质声学性质原位测量技术研究

Development of in situ marine sediment acoustic measurement technique

系统介绍了海底底质声学性质原位测量技术,提出了新的原位测量方法,并根据这一测量方法,初步设计制作了相应的海底原位测量仪器。利用初步制作的测量仪器在实验室内对砂质沉积物进行了模拟测量试验,仪器测量得到的沉积物声速与直接透射法测量获得的声速基本一致。在宁波近海海域进行了海上实际测量试验,获得了该测量区域海底底质的声速,验证了此测量技术的可行性,为进一步研发先进的海底原位测量仪器奠定了基础。

In this paper, we systematically introduce the measuring principle of in situ marine sediment acoustic measurement technique, and present a new in situ measuring method. According to this measuring method, we assemble an in situ marine sediment acoustic measurement system. At first, we have a test on different sediments such as arentilla sediment in the laboratory, the acoustic velocity obtained by in situ test accords well with the acoustic velocity acquired by transmission method. Then we run an ocean test in Ningbo offshore in April 2006, and acquire acoustic velocity of the measuring area, which verifies the feasibility of in situ marine sediment acoustic measurement technique, and lays a foundation for advanced development of in situ marine sediment acoustic property apparatus.