为有效地预防、控制海上溢油事件对经济和海洋生态环境造成的严重影响, 针对不易被早期发现的小面积溢油, 结合表面等离子体共振(Surface Plasmon Resonance, SPR)传感技术的实时性、灵敏度高、样品消耗少等特点, 提出了一种新颖的小型海上溢油监测系统。具体而言, 根据所采用的非扫描角度调制模式下的四层Kretschmann型棱镜耦合传感结构和原油样品折射率变化范围, 通过MATLAB仿真确定传感装置中各元件最优参数和相对固定位置, 得到理论检测灵敏度为6.094×10-5 RIU。依仿真结果搭建实验装置, 对蔗糖溶液和原油样品进行了实验分析。实验表明: 蔗糖溶液检测灵敏度与理论仿真灵敏度同数量级, 达到9.017×10-5 RIU, 证实实验装置有效, 原油检测结果符合SPR响应趋势, 验证了该系统方案的可行性。

In order to effectively prevent and control the serious impact of the oil spill incident on the economy and the marine environment, and aiming at the detection of small area oil spills which were not easily detected in the early stage, an original minitype offshore oil spill monitoring system combined with the characteristics of Surface Plasmon Resonance(SPR) sensing technology, such as instantaneity, high sensitivity and low sample consumption was proposed. Specifically, the optimal parameters and relative fixed positions of the components in the sensing device were determined by simulating with MATLAB on the basis of an adoptive four-layer Kretschmann prism-coupled sensing structure in a non-scanning angle modulation mode and the range of refractive index of crude oil samples. The theoretical detection sensitivity was 6.094×10-5 RIU(Unit: Refractive Index). Under the guidance of the simulation results, an experimental device was set up and the experimental analysis for sucrose solutions and crude oil samples was conducted. The experimental results show that the detection sensitivity of sucrose solution is the same as theoretical simulation sensitivity, which corresponded to 9.017×10-5 RIU. The experimental device is effective, and the crude oil detection result conformed to the SPR response trend. The feasibility of the system solution is verified.