title: Error Ellipsoid Analysis for the Diameter Measurement of Cylindroid Components Using a Laser Radar Measurement System.
abstract: The use of three-dimensional (3D) data in the industrial measurement field is becoming increasingly popular because of the rapid development of laser scanning techniques based on the time-of-flight principle. However, the accuracy and uncertainty of these types of measurement methods are seldom investigated. In this study, a mathematical uncertainty evaluation model for the diameter measurement of standard cylindroid components has been proposed and applied to a 3D laser radar measurement system (LRMS). First, a single-point error ellipsoid analysis for the LRMS was established. An error ellipsoid model and algorithm for diameter measurement of cylindroid components was then proposed based on the single-point error ellipsoid. Finally, four experiments were conducted using the LRMS to measure the diameter of a standard cylinder in the laboratory. The experimental results of the uncertainty evaluation consistently matched well with the predictions. The proposed uncertainty evaluation model for cylindrical diameters can provide a reliable method for actual measurements and support further accuracy improvement of the LRMS.
authors.affiliation: School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200030, China. zcdu@sjtu.edu.cn.
authors.forename: Zhengchun
authors.initials: Z
authors.lastname: Du
authors.affiliation: School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200030, China. wzy19901108@163.com.
authors.forename: Zhaoyong
authors.initials: Z
authors.lastname: Wu
authors.affiliation: School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200030, China. jgyang@sjtu.edu.cn.
authors.forename: Jianguo
authors.initials: J
authors.lastname: Yang
keywords: 3D acquisition; error ellipsoid; laser radar; point cloud; uncertainty model