光学精密工程2012，Vol.20Issue(1)：124-130,7.DOI:10.3788/OPE.20122001.0124
基于虚拟立体视觉的气液两相流三维测量系统的标定
Calibration of three-dimensional measurement system for gas-liquid two phase flow based on virtual stereo vision
摘要
Abstract
A calibration technique for the three-dimensional measurement system of gas-liquid two phase flow based on a virtual stereo vision was researched. Firstly, a single high-speed camera and two groups of mirrors were used to construct the virtual stereo vision system and to establish a perspective transformation model for the high-speed camera and a virtual stereo vision three-dimensional measurement model. Then, the camera and the virtual stereo vision sensor in the virtual stereo vision system were calibrated. Finally, the distribution of the bubble in the water was simulated by a target standard ball and its space distance was regard as the measurement standards. Furthermore, the impacts of different calibration methods on the accuracy of three-dimensional reconstruction were compared. Experimental results indicate that the accuracy of the three-dimensional reconstruction is the best when the calibration reference is placed in a water tank and the left and right virtual cameras andsensors are calibrated, respectively. The absolute error and the relative error of the measurement distance are better than 0. 13 mm and 0. 49% , respectively. It suggests that the impact of the light splitting path and tube wall refraction on the calibration accuracy should be taken full account of in the calibration of the gas-liquid two-phase flow three-dimensional measurement system based on the virtual stereo vision system.关键词
气液两相流/三维测量系统/虚拟立体视觉/标定/误差分析Key words
gas-liquid two phase flow/ three-dimensional measurement system/ virtual stereo vision/ calibration/ error analysis分类
信息技术与安全科学引用本文复制引用
薛婷,曹兆峰,金俞鑫..基于虚拟立体视觉的气液两相流三维测量系统的标定[J].光学精密工程,2012,20(1):124-130,7.基金项目
国家自然科学基金资助项目(No.60902084,61172120) （No.60902084,61172120）
教育部博士点新教师基金资助项目(No.200800561059) （No.200800561059）
精密测试技术及仪器国家重点实验室开放基金资助项目(No.PIL0902) （No.PIL0902）
天津大学自主创新基金资助项目 （）
