Precise on-line non-target pose measurement for cylindrical components based on laser scanning
ISSN: 0144-5154
Article publication date: 12 June 2019
Issue publication date: 3 October 2019
Abstract
Purpose
Cylindrical components are common in industry assembly areas. It is necessary to obtain their precise positions and orientations for their assemblies. But some measurement approaches relying on measuring targets are not allowed, as they may not meet the efficiency requirement of on-line measurement or may cause surface damages to the components. Thus, this paper aims to provide a precise on-line non-target scanning method based on 3D vision.
Design/methodology/approach
First, a laser profile sensor is used to acquire point cloud of the side surface of the measured cylindrical component. Then a composite process is conducted to estimate the pose and position of the axis. Aiming at this purpose, two fitting approaches, i.e., axis fitting and generatrix fitting, are tried respectively to estimate the pose parameters from the point cloud.
Findings
The results of Monte Carlo simulations demonstrate that neither the axis fitting nor the generatrix fitting could solely obtain the needed accuracy and precisions roundly. Thus, a new synthesis method is presented. And the results of prototype experiments validate the excellent accuracy and precision of the synthesis method.
Originality/value
This proposed new synthesis method combines the advantages of both the above fitting methods and can be easily integrated into the assembly line to guide the automation assembly process of the cylindrical components precisely.
Keywords
Acknowledgements
Conflict of interests: The authors declare that there is no conflict of interests regarding the publication of this paper.
Citation
Zhang, J., Qiu, Y., Duan, X. and Yang, C. (2019), "Precise on-line non-target pose measurement for cylindrical components based on laser scanning", Assembly Automation, Vol. 39 No. 4, pp. 596-606. https://doi.org/10.1108/AA-07-2018-097
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited