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| An evaluation method for thick oil film on sea surface based on band ratio method |
| CUI Yong-qiang1,KONG De-ming2,KONG Ling-fu1,ZHANG Xiao-dan1,KONG De-han3,YUAN Li1,LI Chao1 |
1. School of Information Science and Engineering,Yanshan University,Qinhuangdao, Hebei 066004, China
2. School of Electrical Engineering, Yanshan University,Qinhuangdao, Hebei 066004,China
3. Hebei University of Environmental Engineering,Qinhuangdao, Hebei 066004,China |
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Abstract Oil spill has become one of the most serious problems of marine pollution, laser-induced fluorescence (LIF) technology is considered to be one of the most effective detection technologies for sea oil spill. At present, based on LIF, the oil film thickness inversion algorithm is only suitable for the thin oil film (≤20μm). In order to detect the thick oil film, a dual-band ratio model is proposed to evaluate the thickness of thick oil film, the wave characteristics of oil film fluorescence spectra are used to invert the thickness and the applicability of the method are given. The method is verified by experiments. When the oil film is thin, the inversion error is large, and it decreases gradually with the increase of the oil film thickness. When the oil film fluorescence signal tends to saturation, the inversion error is large and increases rapidly with the increase of the oil film thickness. The experimental results show that the algorithm can effectively evaluate the thickness of spill film in the range of 200~1400μm on the sea surface, and the relative error of the oil film fluorescence signal can be used to evaluate the applicability of the algorithm.
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Received: 31 March 2020
Published: 02 November 2020
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2020, Vol. 41 
