摘要： 针对立体视觉测量技术在风洞试验中的应用特征,设计基于线阵CCD的三目视觉立体测量系统。利用基于双高斯物镜的组合透镜,在降低光学畸变的前提下实现点光源到线光源的变换。组合镜头可对CCD进行三自由度微调,保证测量目标成像于焦平面附近。在系统标定过程中利用三坐标测量机构建虚拟阵列靶,以最大限度地提高标定靶精度。实例应用结果表明,该系统能够实现三自由度虚拟飞行系统模型运动轨迹的追踪及自由振动系统机械阻尼的测量。

关键词: 风洞试验, 姿态测量, 三目视觉, 线阵CCD, 虚拟阵列靶

Abstract: Aiming at the application feature of the stereovision measurement in wind tunnel test,a trinocular stereovision measurement system based on linear CCD is designed.The cylindrical lens system based on biotar lens is fixed on the focal plane of CCD,which is used to convert the point light to linear light,and to reduce the lens distortion simultaneously.Adjusted by three-DOF mechanism to CCD,measurement target can form image nearby the focal plane.The virtual calibration target,constructed with coordinate measuring machines,is used to compute the transformation parameter accurately.Example application results show that the system can track the trajectory of the three-degree-of-freedom virtual flight system,and measures the mechanical dump of free-oscillation system accurately.

Key words: wind tunnel test, attitude measurement, trinocular vision, linear CCD, virtual array target

中图分类号: 

• TP391