摘要
海底沉积物的声学特性（最重要的是声速和声衰减）以及它们与物理（包括土力学）特性之间的关系是沉积物声学中两个重要的研究项目．介绍了新研制的实时监控多频海底声学原位测试系统．该系统可测量浅表层沉积物的声速．探测频率为8，10，12，15kHz，可根据实际情况选择发射波形、接收增益和采样长度，采样率为0．5～2．0MHz，工作水深为300m．系统具有倾斜传感器、8通道扩充等功能．用该系统在杭州湾测得了四种频率的沉积物原位声速．
The marine sediment acoustic characteristics （such as sound speed and attenuation） as well as their relationship with physical characteristics （including soil mechanics） are two important research topics in marine sediment acoustics. A new developed real time monitoring multi-frequency in situ sediment geoacoustic measuring sysem was introduced. The geoacoustic measuring system is designed for sound speed measurements of the seabed measuring. The measuring frequencies are 8, 10, 12 and 15 kHz. A transmitting waveforms, receiving gain and sampling length could be changed according to sediments. A sampling rate is designed from 500 kHz to 2 MHz, and an operating depth is 300 m. The geoacoustic measuring system has a tilt sensor and eight channels expansion. A set of in situ sound speeds of four different frequencies is observed in the Hangzhou Bay.
出处
《海洋学报》
CAS
CSCD
北大核心
2006年第2期46-50,共5页
基金
国家"863"计划资助项目(2002AA615130)
国家自然科学基金资助项目(NSFC49906004)
国家海洋局重点青年基金资助项目(20005002)
浙江省151工程资助项目
关键词
海底沉积物
声学原位测试
声速
marine sediment
in-situ measurement
sound speed
