磁致液面变形及其光学测量  

Surface Deformation of Liquid in Magnetic Field and Optical Measurement

作　　者：赵文杰[1] 靳奋安[1] 

机构地区：[1]兰州交通大学数理与软件工程学院,甘肃兰州730070

出　　处：《四川大学学报（工程科学版）》2010年第1期206-210,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家863计划资助项目(2006AA11A144)

摘　　要：为获取磁场中气液界面的特性参数,提出基于镜面反射成像与结构照明相结合的方法对磁致液面变形进行测量。根据图像映射和条纹灰度矩阵提取条纹图的相位差进行液面变形量的计算,并重建三维变形液面。得到了结论:液体表面附近处的梯度磁场将引起表面张力的不均匀而使其发生变形,变形量及方向与磁场强度和梯度的空间分布有直接关系,为浮力-热毛细对流的相关研究提供一种新的途径。In order to get the characteristic parameter of gas-solution interface in magnetic field, measurement of deformation was done by the method based on mirror image combined with the structure illumination. The quantitative results of surface deformation were calculated from the phase unwrapping of gray matrie and 3D reconstruction. The present experiment demonstrated that the unhomogeneity of surface tension induced by gradient magnetic field near the surface of liquid could lead to surface deformation, the quantity and direction of deformation are directly related to the distribution of gradient filed, and a new way to the research of the kinetics of Buoyant - Thermcapillary Convection is proposed .

关 键 词：梯度磁场 液面变形 结构照明 镜面反射成像 灰度矩阵 相位展开 

分 类 号：O438[机械工程—光学工程]