利用数字图像处理技术测量浓度场的实验研究  

Experimental study on concentration field using digital image processing technology

作　　者：顾杰[1] 郑宇华[1] 

机构地区：[1]上海海洋大学海洋科学学院,上海201306

出　　处：《水动力学研究与进展（A辑）》2016年第6期681-688,共8页Chinese Journal of Hydrodynamics

基　　金：国家重点基础研究发展计划(2012CB957704)~~

摘　　要：利用数字图像处理技术是当前研究环境污染物扩散机理的重要手段。该文通过水槽实验,分析了污染物图像的灰度与污染物的浓度、光源的距离以及排放口所在水深的关系,并建立了污染物浓度与图像灰度关系的方程。利用该方程对射流在横流中测量的图像进行了浓度场计算,得到的结果与实际情况吻合较好,因此,该方法能广泛应用于物质扩散机理的研究。Digital image processing technology is an important method in study on mechanism of pollutant diffusion in water environment. In this study, through the physical experiments on a jet discharging into different ambient flows in a flume, the pollutant concentrations are recorded by digital images. The relationships of image intensity with pollutant concentration, distance between light source and jet, and water depth at jet location are analyzed. The equations between pollutant concentration and image intensity are setup. These equations are used to calculate the pollutant concentration from recorded image of a jet in crossflow, which demonstrate that the calculation values are in good agreement with experimental measured values. Hence, this method can be widely applied to research the fields on diffusion mechanism.

关 键 词：浓度场 灰度 射流 数字图像处理技术 

分 类 号：O353.5[理学—流体力学]