海洋激光荧光雷达海面油膜种类鉴别研究

海洋激光雷达在探测海面油荧光方面的应用 ,受到广泛重视。海洋激光荧光雷达是以物质荧光谱理论为基础 ,将荧光技术应用于海面油膜检测领域。本文介绍了激光荧光原理 ,青岛海洋大学海洋激光雷达的基本结构和工作过程 ,以及该套系统进行海面油膜种类鉴别的使用方法和适用范围。通过实验证明 ,该套系统性能可靠 ,测量值稳定 ,能够进行一定程度上的油荧光测量。提出采用荧光强度 4 35 / 380 ,4 35 / 5 0 0 ,4 35 / 5 5 0 ,3个比值作为油样荧光特性的描述值进行油种鉴别。相对其他的鉴别方法 ,三比值法无须配置溶液 ,适于现场测量。根据系统响应情况提取的特征值不但更有针对性 ,而且由于特征值数量多 ,对荧光谱分布曲线的描述更加准确。

Studies on Distinguishing Oil on Surface of Ocean by Ocean Fluorescence Lidar

Based on the fact that the fluorescence spectrum is dependont on the molecular structure of a substance, ocean lidar uses fluorescence detecting technique to examint oil content on the surface of the ocean. In this paper, we introduced the principle of laser fluorescence, the basic structure and the process of work of the ocean laser radar made by Ocean Remote Sensing institution of Ocean University of Qingdao, the using method and the suitable scope that the system is used in the area. There sults show that the system is credible and stable in detecting the fluorescence. A new method to distinguish oil in whichthree specific values are used, is also presented in this paper. If the intensity of oil fluorescence at 435 nm is divided by three other intensities of oil fluorescence at 380 nm,500 nm,550 nm,a good method can be obtained to describe the character of the curve of oil fluorescence. Compared with other methods, three specific values method need not collocate the solution of oil. The choice of the three specific values is more suitable to the system. Using more eigenvalues, the new method could describe the curve of oil fluorescence better.