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针对高速动态的气液两相流动对象,基于双目体视原理,采用单台高速摄像机和反射镜组,对虚拟立体视觉传感器进行了优化设计;对气泡发生装置中竖直向上的气泡特征参数进行三维测量。建立虚拟立体视觉传感器三维测量模型,综合考虑实际视场、传感器结构和测量误差等因素,通过结构参数对3方面性能影响的仿真分析,最终确定传感器的结构参数。实验结果表明,传感器测量空间距离误差优于0.14 mm,相对误差优于0.49%,适于气液两相流动态测量,可以实现气泡运动的三维重建。
For the high-speed dynamic gas-liquid two-phase flow object, based on the binocular vision principle, a single high-speed camera and a mirror set are used to optimize the virtual stereo vision sensor. The vertical bubble parameters in the bubble generation device Make three-dimensional measurements. The three-dimensional measurement model of virtual stereo vision sensor is established. Considering the actual field of view, the structure of the sensor and the measurement error, the structural parameters of the sensor are finally determined through the simulation analysis of the influence of the structural parameters on the three aspects. The experimental results show that the error of the measuring distance of the sensor is better than 0.14 mm and the relative error is better than 0.49%. It is suitable for the dynamic measurement of gas-liquid two-phase flow and can realize the 3D reconstruction of bubble motion.