一种液面微形貌测量技术及在微浮力和表面张力研究中的应用  

A measurement technology of micro-topography of liquid surface and its application to evaluating micro buoyancy and surface tension

作　　者：刘战伟[1] 杨晓波[1] 方志军[1] 谢惠民[2] 

机构地区：[1]北京理工大学宇航学院力学系,北京100081 [2]清华大学航天航空学院力学系,北京100084

出　　处：《光学技术》2011年第6期641-646,共6页Optical Technique

基　　金：国家自然科学基金资助项目(11072033)

摘　　要：应用改进的云纹法测量微小物体漂浮在水面上所产生的水面凹陷曲面的三维形貌,并根据此三维形貌来定量测量微小物体受到的微浮力和表面张力,分析其与水面的相互作用。通过对不同大小的硬币浮在水面上所形成的液面三维形貌的测量以及进一步的分析表明:硬币浮在水面上是表面张力和浮力共同作用的结果,其中浮力起主要作用。该实验验证了所提出的技术可以方便地应用在液面微形貌测量以及表面张力和微浮力等研究中。An improved moire method is developed.The Micro 3-D topography of curved liquid surface caused by small objects floating on it can be measued with this method.The micro buoyancy and surface tension can be further investigated from the obtained 3-D topography.3-D topography of curved liquid surface caused by coins with different size is measued,the surface tension and buoyancy are analysized based on the 3-D topography.The obtained results show that coins floating on water is supplied by both the surface tension and buoyancy,especially buoyancy playing an essential role.The validation tests verify that the proposed method is feasible in 3-D topography measurement and quantitative analysis of the micro surface tension and buoyancy force.

关 键 词：光学测量 云纹法 表面张力 液面三维形貌 

分 类 号：O435[机械工程—光学工程]