光诱渔船金属卤化物集鱼灯海面光场分布计算方法优化研究  

Optimization on calculation method of horizontal illuminance for metal halide fish lamp around fishing boats

作　　者：王伟杰[1] 万荣[1,2] 孔祥洪 肖俞辰 WANG Weijie;WAN Rong;KONG Xianghong;XIAO Yuchen(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;National Engineering Research Center for Oceanic Fisheries/Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Shanghai 201306,China)

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]国家远洋渔业工程技术研究中心/大洋渔业资源可持续开发重点实验室,上海201306

出　　处：《南方水产科学》2022年第5期138-144,共7页South China Fisheries Science

基　　金：国家重点研发计划项目(2019YFD0901503)。

摘　　要：蒙特卡罗模拟是一种有效的计算光场分布的数值模拟方法,通过将光束离散成大量光子,追踪光子路径计算目标区域的光照强度。为准确计算集鱼灯的海面光场分布情况,以金属卤化物集鱼灯为例对蒙特卡罗模拟求解过程中的光子数取值和光子辐射模型展开分析和优化。针对光子数取值问题,通过设定不同光子数进行数值模拟,探讨光子数差异对模拟结果稳定性的影响。针对光子辐射模型问题,根据灯具光度分布数据提出光子辐射优化模型,通过实测数据进行验证。结果显示:(1)模拟光子数取值越大,模拟结果的稳定性越好;以与灯具水平距离5 m的计算点为例,当取值设为10^(8)时结果的差异系数为0.07%,光子数取值继续增加至10^(10),则差异系数为0.05%;(2)模型优化后,模拟计算结果与实测的相对误差均值从0.0512减少至0.0453。此外,应用优化模型计算了渔船在实际作业环境的光场照度情况,计算结果与实测值的平均误差约为0.0523。Monte Carlo simulation is an effective numerical simulation approach to calculate illuminance at target region by discretizing beam into photons and calculating illuminance based on tracking photon path.In order to calculate the horizontal illumination distribution of the fish lamp accurately,taking the metal halide fish lamp as an example,we analyzed and optimized the photon number and photon emission model in the process of Monte Carlo simulation.For the photon number,we carried out the numerical simulation by setting different photon numbers to analyze its influence on the stability of simulation results.Meanwhile,we presented a photon emission optimization model based on the luminosity distribution data of fish lamp and verified by the measured data.The results show that:(1)The larger the number of the simulated photon,the better the stability of the simulation result.Taking the calculation point with a horizontal distance of 5 m from the lamp as an example,when the value exceeded 10^(8),the coefficient variance(CV)was 0.07%and when the value exceeded 10^(10),the CV was 0.05%.(2)By using the optimized model,the mean relative error(MRE)between the simulated and measured data reduced from 0.0512 to 0.0453.In addition,we calculated the light field illumination of fishing boats in the actual working environment by using the optimized model,and the average error between the calculated value and measured value was about 0.0523.

关 键 词：金属卤化物集鱼灯 海面光场分布 光子辐射模型 蒙特卡罗模拟 

分 类 号：S972.632[农业科学—捕捞与储运]