| 原位测量技术在黄海沉积声学调查中的应用 |
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| 引用本文： | 阚光明,刘保华,韩国忠,李官保,赵月霞. 原位测量技术在黄海沉积声学调查中的应用[J]. 海洋学报, 2010, 32(3): 88-94 |
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| 作者姓名： | 阚光明 刘保华 韩国忠 李官保 赵月霞 |
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| 作者单位： | 国家海洋局 第一海洋研究所,山东 青岛 266061;国家海洋局 第一海洋研究所 海洋沉积与环境地质国家海洋局重点实验室,山东 青岛 266061 |
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| 基金项目： | 国家"八六三"计划项目(2008AA09Z305;2008AA09Z301);海洋公益性行业科研专项经费项目(200805008);国家海洋局第一海洋研究所基本科研业务费专项基金项目(2007G14)。 |
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| 摘 要： | 介绍了最新研制的基于液压驱动贯入的自容式海底沉积声学原位测量系统及其在南黄海中部海底沉积声学调查中的应用。该系统可以实现对海底沉积物声速和声衰减系数进行原位测量,通过液压驱动装置将四根声学探杆匀速贯入到海底沉积物中,减少了对沉积物的扰动,可按照预设的工作参数在海底全自动工作,无需甲板上人员实时控制,采集的声波信号自容式存储于存储单元。系统工作水深为500 m,测量深度为1 m,测量频率为30 kHz,采样频率为10 MHz。使用该系统在南黄海中部获得了40个站位不同类型沉积物的声学特性原位测量数据,并使用CTD剖面仪对该系统声速测量进行了标定,相对误差均小于0.5%,表明该系统测量数据准确、可靠。
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| 关 键 词： | 原位测量系统 声速 声衰减系数 海底沉积物 |
| 收稿时间： | 2010-01-15 |
| 修稿时间： | 2010-03-21 |
Application of in-situ measurement technology to the survey of seafloor sediment acoustic properties in the Huanghai Sea |
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| KAN Guang-ming,LIU Bao-hu,HAN Guo-zhong,LI Guan-bao and ZHAO Yue-xia. Application of in-situ measurement technology to the survey of seafloor sediment acoustic properties in the Huanghai Sea[J]. Acta Oceanologica Sinica (in Chinese), 2010, 32(3): 88-94 |
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| Authors: | KAN Guang-ming LIU Bao-hu HAN Guo-zhong LI Guan-bao ZHAO Yue-xia |
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| Affiliation: | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of State Oceanic Administration for Marine Sedimentology and Environmental Geology, First Institute of Oceanography,State Oceanic Administration,Qingdao 26 |
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| Abstract: | A novel self-contained in situ sediment acoustic measurement system based on hydraulic driving penetration and its application in the middle area of the southern Huanghai Sea are introduced in detail. The system was designed for the in situ measurement of sound speeds and attenuation coefficients of seafloor sediments. By using a hydraulic driving device, the system drives four acoustic probes into sediments at an even speed, and this decreases disturbances to sediments introduced by the penetration of acoustic probes. It can work full-automatically on the seafloor without real-time control, and data are stored self-containedly into its storage unit. Its operating water depth and the measuring depth are 500 and 1.0 m respectively. The measuring frequency is 30 kHz, and the sampling rate of A/D converter is 10 MHz. A set of in situ sound speeds and attenuation coefficients of seafloor sediments were obtained at 40 stations in the middle area of the southern Huanghai Sea. The seawater sound speed measured by the in situ system was calibrated according to the seawater sound speed measured by a CTD profiler.The relative error is less than 0.5%. The result indicates that the data measured by the in situ sediment acoustic system are accurate and credible. |
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| Keywords: | in situ measurement system sound speed sound attenuation coefficient seafloor sediments |
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