激光全息干涉法测量液相质扩散系数数字图像处理的研究  

Investigation on Holographic Interferometry Measurement of Liquid Mass Diffusion Coefficient of Digital Image Processing

作　　者：费继友[1] 涂娟[1] 

机构地区：[1]大连交通大学机械工程学院,大连116028

出　　处：《化工自动化及仪表》2008年第5期46-50,共5页Control and Instruments in Chemical Industry

基　　金：国家自然科学基金资助项目(50676069)

摘　　要：用He-Ne激光器、CCD和图像采集系统等仪器设备,搭建了数字激光全息干涉法测量液相质扩散系数的实验系统,并测试获得了浓度为0.33 mol/l KCl水溶液在298.15 K温度下的全息干涉图像,采用了图像增强、全息干涉条纹图再现及相位展开等数字图像处理过程的关键技术对全息干涉图进行处理,得到了相位展开后物光相位差,经换算后获得了该溶液的质扩散系数。为化工工程上研究替代制冷剂急需的质扩散系数测量提供了有效的方法。An experimental optical system based on digital image holographic interferometry measurement of liquid mass diffusion coefficients was constructed by He-Ne laser, CCD, image acquisition system and other equipments, the system was tested and the interferograms of KCl aqueous solution were collected at 0.33 mol/l concentration and 298.15K. By employing such key techniques of digital image processing as the image enhancing, the interference fringes rebuilding and the phase unwrapping to process the interferograms, the phase difference was obtained, and therefore the mass diffusion coefficients of KCl aqueous solution was also gained by conversion. It can be concluded that the system can provide an effective method for measuring the mass diffusion coefficient of new refrigerants, which is urgently required in chemical engineering application.

关 键 词：数字激光全息干涉法 数字图像处理 质扩散系数 干涉图 水溶液 KCL 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]