Linear calibration for on-machine measurement of laser probe pose

被引：6

作者：

Zhang L.-Y. ^{[1
]}

Yi H.-M. ^{[1
]}

Liu S.-L. ^{[1
]}

机构：

[1] College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing

来源：

Guangxue Jingmi Gongcheng/Optics and Precision Engineering | 2016年 / 24卷 / 04期

关键词：

Error compensation; Laser scanning measurement; Linear calibration; On-machine measurement; Probe calibration;

D O I：

10.3788/OPE.20162404.0681

中图分类号：

学科分类号：

摘要：

A calibration method suitable for a laser probe in on-machine laser scanning measurement was proposed to eliminate the measuring errors from installation pose. A prototype system for the on-machine laser scanning measurement was built and a model of the laser probe moved with a machine tool was established. The center of a standard ball was fitted by scanning the ball surface with multi-perspective, and a linear algorithm to solve the installation pose parameters of the laser probe was given to overcome the heavy computation and un-robustness of the existing nonlinear algorithms. The influence of the machine tool movement error on the measurement was also analyzed and an error model was established and a compensation method for the machine tool error was proposed. The experimental results show when the standard ball with a known diameter was measured, its diameter error measured by the laser probe at different angles is less than 0.05 mm, and the position error of the standard ball center is reduced by 83% with the compensation method. The results illustrate the feasibility of the calibration method as well as the validity of the error model and the compensation method. © 2016, Science Press. All right reserved.

引用

页码：681 / 689

页数：8

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