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| 缆控式海底沉积物声温同步探测取样系统研发与应用 |
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王浩森1,2, 张建兴1,3, 刘玉斌1,2, 郭常升1,2,3, 栾振东1,2,3
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1.中国科学院海洋研究所, 中国科学院海洋地质与环境重点实验室, 山东 青岛 266071;2.中国科学院大学, 北京 100049;3.中国科学院海洋大科学研究中心, 山东 青岛 266071
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| 摘要: |
| 为精确测量海底浅表层沉积物声学及温度参数, 自主研发了一种缆控式海底沉积物声温同步原位探测取样系统。与国内外传统的沉积物声学原位探测系统相比, 该系统能够完成深海浅表层沉积物声速、声衰减等声学参数以及多点位温度的原位实时测量, 同时实现了可视化同步精准取样。整套系统以5个单元为基础构建,包括声学参数原位测量系统、多点位温度梯度探测系统、浅表层沉积物取样系统、固定组件以及实时通讯控制系统, 实现了声波发射和接收、沉积物取样、多点位温度探测等关键技术的融合。本套系统于2022年5月在台西南盆地进行了海试应用, 成功获取了试验区域海底浅表层沉积物的声速、声衰减系数、温度梯度等原位参数。海试结果表明, 该系统工作稳定,声速测量精度小于2%, 原位温度梯度精度误差小于0.001 ℃。同时, 获取低扰动高保真的原位柱状沉积物样品共计超过3 m, 用于后期实验室与原位测量的对比分析。该系统的成熟应用, 有助于提高海底浅表层沉积物声学参数的探测效率与精度。 |
| 关键词: 海底沉积物 原位测量 声速 衰减 温度梯度 |
| DOI：10.11759/hykx20220921001 |
| 分类号:P715;P716.41;P716.43;P733.23 |
| 基金项目:中国科学院先导专项项目子课题(XDA22050502,XDA19060402);中国科学院关键技术人才项目(2018-2021) |
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| Development and application of a cable-controlled marine sediment acoustic, temperature - based, and sampling system |
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WANG Haosen1,2, ZHANG Jianxing1,3, LIU Yubin1,2, GUO Changsheng1,2,3, LUAN Zhendong1,2,3
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1.Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.University of Chinese Academy of Sciences, Beijing 100049, China;3.Center For Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
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| Abstract: |
| To accurately measure the acoustic and temperature parameters of subsurface sediments, a cable-controlled, marine sediment, acoustic, temperature, and sampling system is independently developed for the synchronous detection of subsea sediments. The system can measure the acoustic parameters, such as the sound velocity and attenuation, and multipoint temperatures in real time. Furthermore, it realizes in-situ visualization and more accurate sampling compared with the traditional in-situ acoustic measurement technique used globally. The system comprises five units: an in-situ acoustic parameter measurement system, a multipoint temperature gradient detection system, a shallow sediment sampling system, a real-time communication control system, and fixed components. The basic construction of the system realizes the integration of key technologies, along with a scientific layout and coordination among various systems. The technique was successfully tested in the Southwest Tainan Basin in May 2022, following which the in-situ parameters (such as the sound velocity, attenuation coefficient, and temperature gradient) of shallow seabed sediments in the test area were obtained. The following observations are derived from the aforementioned test: the system works in a stable manner, sound velocity measurement accuracy is about 2%, and in-situ temperature gradient accuracy error is <0.001 ℃. Moreover, low-disturbance, high-fidelity in-situ columnar sediment samples totaling >3 m in length are obtained for later comparative analysis between the laboratory and in-situ measurements. The mature application of this system will help increase the detection efficiency and accuracy of the acoustic parameters of shallow seabed sediments. |
| Key words: marine sediment in situ measurement sound velocity attenuation temperature gradient |