TITLE:
Enhancement of Process Capability for the Vision-Guided Robot
AUTHORS:
Yongjin Kwon
KEYWORDS:
Process Capability, Assembly Robot, Vision Calibration, Positioning Accuracy
JOURNAL NAME:
Journal of Computer and Communications,
Vol.3 No.11,
November
19,
2015
ABSTRACT: This study addresses a
critical problem in the control of process capability as to the positioning
accuracy of vision-guided robot. Depending on the calibration accuracy, the
process capability varies widely, which renders the precise control of assembly
tasks difficult. Furthermore, some vision sensors prohibit the programming
access to rectify the lens distortion effects, which even complicates the
problem. This study proposes a method of circumventing the lack of programming
access by implementing the lens optical center alignment. Three different
calibration methods are compared as to the process capability, and the proposed
method shows a very good accuracy. The method can be easily adopted on the shop
floor since it doesn’t require a complex setup and mathematical derivation
process. Therefore, the practitioners can benefit from the proposed method,
while maintaining a high level of precision in terms of robot positioning
accuracy.