摘要
圆结构光复杂深孔内轮廓3D测量系统中,被测半径与系统成像半径之间关系存在非线性、一次测量所获取的图像中阴/阳线圆光条不属于同一被测深孔截面、膛线遮挡形成测量盲区。通过分析问题的成因,本文提出了改进设计方案。将系统扩束锥镜的半锥角由原来的45o改进为50.7o,并对系统结构参数相应进行调整,改进后消除了系统非线性误差,提高了系统测量精度;阴/阳线圆光条属于同一被测深孔截面,且消除了阴线圆端部一侧遮挡,能够提高3D重构精度与效率。
A 3D measurement system of complex deep-hole profiles based on ring-structured-light was presented. By analyzing disadvantages of the original system,such as nonlinearity between the input and output,the exterior and the interior stripe points of the image belonging to different measured profile in once measurement and existing occlusions due to rifling,an improved scheme was proposed,in which the half-angle of the conic mirror was changed from 45o to 50.7o. In the meantime,related parameters of the measurement system were also adjusted. The improved system eliminates nonlinearity error,which increases measurement accuracy. The exterior and the interior stripe points belong to the same measured profile,and one side of the occlusions of the exterior stripe is eliminated,which can increase the efficiency and the accuracy of 3D reconstruction.
出处
《光电工程》
CAS
CSCD
北大核心
2010年第1期7-12,共6页
Opto-Electronic Engineering
基金
111高等学校科技创新引智计划资助(B08043)
关键词
圆结构光
3D测量
扩束锥镜
光学检测
深孔类零件
ring-structured-light
3D measurement
reflection conic mirror
optical detection
hole-type parts
