摘要
针对"蛟龙"载人潜水器深海探测中利用超声波对富钴结壳进行原位探测的问题,在实验室模拟不同地区的富钴结壳与各类型基岩,使用2.25 MHz超声波探头发射的的高频超声波信号对采用地质拖网采集的富钴结壳进行测量。首先,对不同海山的富钴结壳进行了声速的测量与回波强度的测试。然后,对富钴结壳样品的下伏基岩进行测试,通过数字示波器得到反射波形数据,并分析得到其回波强度,通过回波强度对富钴结壳下的基岩种类进行分类。实验结果表明,样品的下伏基岩蚀变玄武岩、碳酸盐沉积物、钙质远洋沉积与泥质块的反射波形不同,回波强度存在差异,高频声波能够有效地区分富钴结壳下基岩的种类,为载人潜水器的水下原位测厚提供了可能。
Aiming at the problem of in-situ detection of cobalt-rich crusts by using ultrasonic wave in the deep sea exploration of the ＂Jiaolong＂ manned submersible. In this paper, cobalt-rich crusts and various types of bedrock in different areas are simulated in the laboratory, and high-frequency ultrasonic signals transmitted by a 2.25 MHz ultrasonic probe are used to measure cobalt-rich crusts collected using geological trawls. Firstly, researchers carried out measurement of the sound velocity and the echo intensity of cobalt-rich crusts from different sea mounts. Then, cobalt-rich crust samples with bedrock were tested to obtain the reflection wave form and the echo intensities of all types of bedrock, whose types are classified by the intensity of the echoes. The experimental results show that the echogenic intensities are different for altered basahs, carbonate sediments, calcareous oceanic sediments and mud blocks＂ reflection wave form and the echo intensities. High-frequency acoustic waves can effectively distinguish the types of bedrock under the cobalt-rich crust. It＇s possible for manned submersibles to finish the aim of in-situ thickness detection.
作者
丁忠军
潘文超
林永春
DING Zhong-jun1, PAN Wen-chao2, LIN Yong-chun2(1. National Deep-Sea Base Management Center, Qingdao 266200, Shandoag Province, China; 2. College of Automation and Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266100, Shandong Province, Chin)
出处
《海洋技术学报》
2018年第1期23-27,共5页
Journal of Ocean Technology
基金
泰山学者工程专项经费资助项目(tspd20161007)
关键词
载人潜水器
富钴结壳
原位探测
高频声波
回波强度
manned submersible
cobalt-rich crusts
in-situ detection
high-frequency sound waves
echo strength
