基于CCD的轴径检测方法  

Shaft diameter measuring method based on CCD

作　　者：孙秋成[1,2] 谭庆昌[1] 唐武生[1,3] 郑福胜[1] 侯跃谦[1,3] 

机构地区：[1]吉林大学机械科学与工程学院,长春130022 [2]长春工业大学基础科学学院,长春130012 [3]长春大学机械工程学院,长春130022

出　　处：《吉林大学学报（工学版）》2010年第5期1273-1277,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：吉林省科技发展计划项目(20070306)

摘　　要：给出了一种CCD相机标定与亚像素边缘检测相结合的轴径测量方法。该方法在修改了张正友标定方法中的畸变模型的基础上,利用专门设计的夹具夹持标定板进行CCD相机的外部参数标定,有效地保证了被测轴的夹持状态与标定的外部参数一致。使用拟合形式的亚像素边缘检测算法确定轴的两条边缘的位置,同时给出了利用伪直径确定真实轴径的函数关系式。通过与精密量具的测量结果对比,当轴径的基准尺寸在35～75mm时,该方法测量的平均误差为0.02mm。A non-contact, high-precision shaft diameter measuring technique was proposed combining the CCD camera calibration and sub-pixel edge detection. Based on the improved distortion model of ZHANG Zheng-you, the parameters of the CCD camera were calibrated fixing the calibration board by a specially designed fixture to ensure the agreement between the clamped state of the measure shaft and the calibrated external parameters. A fitting form of sub-pixel edge detection algorithm was used to localize the two edges in the shaft image. An expression to determine the real shaft diameter from the pseudo-diameter was derived. The comparison of the measuring results with those obtained by the traditional precision measuring tool showed that for the basic dimension of measured shaft diameter 35~75 mm the average error of the proposed technique is about 0.02 mm.

关 键 词：仪器仪表技术 轴径测量 CCD相机 非接触测量 

分 类 号：TH124[机械工程—机械设计及理论]