摘要
强反射表面的高精度金属件和光学件的表面轮廓测量,是形貌检测领域的一个难点.文中提出了一种用于逆向工程领域的自由曲面非接触测量系统,其由三坐标测量机和主动式双目视觉形貌测头组成.通过摄像机标定了视觉测头,利用光学偏振技术消除了金属表面强反射光对测量的干扰.对扫描路径进行了规划,并根据金属表面加工纹理方向,选择采样策略.通过对量块表面的测量,验证了使用非接触方法测量金属强反射表面的可行性.研制测头的精度达到了0.05mm.
Measuring high reflective surfaces,such as high-accurate metallic and optical pieces,is one of the most challenging technologies in dimensional measurements.This paper introduces a non-contact measurement system for free-form surface in reverse engineering,which consists of coordinate measuring machines(CMM)and a binocular vision probe.Using camera calibration technique,the stereo vision probe is calibrated quickly and accurately.For eliminating the disturbance of specular light on metallic surfaces,optical polarization technique is adopted.The layout of scanning path is established and adaptive sampling strategy is selected based on machined traces of metallic surfaces.Through measuring surfaces of gauge blocks,this system is viable to measure high-reflective metallic surface.An accuracy of 0.05 mm is achieved in the first prototype developed probe.
出处
《天津大学学报（自然科学与工程技术版）》
EI
CAS
CSCD
北大核心
2004年第10期910-913,共4页
Journal of Tianjin University：Science and Technology
基金
国家自然科学基金资助项目(50075064)
美国联合技术公司(UTRC)容闳基金资助项目.
关键词
摄像机标定
非接触测量
视觉形貌测头
金属强反射表面
camera calibration
non-contact measurement
vision probe
high-reflective metallic surface
