Three-dimensional measurement of bubble volume based on dual perspective imaging  

作　　者：XUE Ting ZHANG Shao-jie WU Bin 薛婷;张少杰;吴斌(School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China;State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China)

机构地区：[1]School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China [2]State Key Laboratory of Precision Measuring Technology and Instruments, Tianfin University, Tianfin 300072 China

出　　处：《Optoelectronics Letters》2017年第1期70-73,共4页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61372143 and 61671321)

摘　　要：This paper presents a new three-dimensional(3D) volume measurement approach of bubble in gas-liquid two-phase flow. According to the dual perspective imaging principle,bubble feature images can be captured from two different view angles. The least square ellipse fitting algorithm is used to figure out the feature parameters from the captured images. Then the 3D volume of bubble can be quantitatively measured. Compaerd with the traditional volume estimation methods based on single perspective imaging,it can effectively reduce the loss of bubble feature information. In the experiment,the 3D volume reconstruction of bubbles from dual perspective images is conducted,and the variation of bubble volume in the bubble rising process is studied. The results show that the measurement accuracy based on the proposed 3D method is higher than those based on traditional methods. The volume of rising bubble is periodically changed,which indicates that bubble achieves periodic rotation and deformation in the rising process.

关 键 词：bubble captured fitting rotation projection camera figure periodically quantitatively directional 

分 类 号：O359.1[理学—流体力学]