基于光学技术的水下气泡探测实验研究  

Experimental study on underwater bubble detection based on optical technology

作　　者：秦华伟[1] 陶辰超 蔡真[2] 范相会 

机构地区：[1]杭州电子科技大学,机械电子工程研究所,浙江杭州310018 [2]浙江大学,海洋学院,浙江舟山316021

出　　处：《海洋科学》2016年第6期119-125,共7页Marine Sciences

基　　金：国家自然科学基金项目(41276092)~~

摘　　要：热液/冷泉溢出含有硫化氢、甲烷、二氧化碳等化学成分的气泡。实验室模拟海底热液/冷泉资源溢出气泡环境搭建了实验平台,以甲烷气体为实验气体,在黑暗环境下用高速光电探测器对气泡后向散射光进行接收,用拉曼光谱仪实现甲烷气体气泡后向散射光的拉曼检测,并与计算拉曼光谱比较。由结果可知激光拉曼光谱可以探测到气泡后向散射光,并识别气泡中含有的气体成分。通过探测气泡成分,从而判定这些气泡是否来自海底热液/冷泉等甲烷资源溢出。这样的探测方式,探测准确率高,缓解探测深度,同时避免探测设备直接与海底资源直接接触而造成的寿命缩减,为将来的海洋探测与实际应用打下了良好的基础。Marine scientific study has become a key strategy for our country and will be constantly enhanced in the future. In deep-sea ecosystems, hydrothermal vents and cold seeps have great scientific value. The gas they emit comprises mainly H2 S, CH4, CO2, and so on. In this paper, we set up an experimental laboratory platform to simulate the bubbles that escape from hydrothermal vent and cold seep environments. Methane gas was used as the experimental gas and the backscattered light from the bubbles was detected in a dark environment with a photoelectric detector. A Raman spectrometer was then used to detect the backscattered light from bubbles containing the CH4 gas. After comparing with the calculated Raman spectroscopy, the results showed that the laser Raman spectroscopy can detect the light backscattered from the bubbles and is able to distinguish the gas. This method can indicate the origin of gas bubbles and can show whether they are emitted from a hydrothermal vent, a cold seep, or from other sources that are not necessarily methane resources. Application of this method has the advantage of detection accuracy, resulting from the direct contact of the detection equipment with the potential marine resources.

关 键 词：甲烷气体 气泡后向散射光 光电探测器 拉曼光谱 计算拉曼光谱 

分 类 号：P736[天文地球—海洋地质]