Author:
Miyashita Leo,Ishikawa Masatoshi, ,
Abstract
In this paper, we propose a measurement system that employs a camera array based on a non-telecentric optical system and an accompanying measurement algorithm to measure the straightness, length, diameter, and appearance of a rod. Measurements using telecentric optical systems, which employ orthogonal projection to preserve the dimensional ratios regardless of distance, are common in image-based inspection of the dimensional or geometrical tolerances of industrial products. However, some cases depend on the size of the target or inspection item, wherein it is difficult to configure a measurement system using telecentric optical systems. As an example, this study considers the measurement of straightness of a long rod and shows that it is possible to achieve high measurement accuracy using non-telecentric optical systems by introducing methods to calibrate miniscule errors and distortions that remain uncorrected in conventional image calibration methods. We also show that the same measurement allows for the measurement of other inspection items and evaluation of their respective measurement accuracies, thereby proving that a flexible image-based inspection process can be constructed using the proposed system and method.
Publisher
Fuji Technology Press Ltd.
Subject
Electrical and Electronic Engineering,General Computer Science
Reference19 articles.
1. J. P. Yun, W. C. Shin, G. Koo, M. S. Kim, C. Lee, and S. J. Lee, “Automated defect inspection system for metal surfaces based on deep learning and data augmentation,” J. of Manufacturing Systems, Vol.55, pp. 317-324, 2020.
2. K. Morishita, T. Hayakawa, Y. Moko, H. Kameoka, and M. Ishikawa, “Tunnel inspection system using high-speed moving visual inspection vehicle,” Proc. of 25th ITS World Congress, AP-TP1421, 2018.
3. T. Hayakawa and M. Ishikawa, “Development of Motion-Blur-Compensated High-Speed Moving Visual Inspection Vehicle for Tunnels,” Int. J. Struct. Civ. Eng. Res., Vol.5, No.2, pp. 151-155, 2016.
4. T. Ishizawa, N. Kanamori, T. Nakamura, and M. Mizoguchi, “An Attempt to Detect Microscopic Scratches on Glossy Curved Surfaces by Camera Images,” Proc. of JSME annual Conf. on Robotics and Mechatronics (Robomec), 2A1-R01, 2019.
5. C. Park, S. Choi, and S. Won, “Vision-based inspection for periodic defects in steel wire rod production,” Opt. Eng., Vol.49, No.1, 017202, 2010.
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