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한국생산제조학회 학술지 영문 홈페이지
[ Technical Papers ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 30, No. 3, pp.233-238
ISSN: 2508-5107 (Online)
Print publication date 15 Jun 2021
Received 02 Feb 2021 Revised 26 Mar 2021 Accepted 19 Apr 2021
DOI: https://doi.org/10.7735/ksmte.2021.30.3.233

Dot Grid와 카메라 영상 오차 보정 알고리즘을 이용한 이차 전지 전극 Alignment 정밀 검사

배일진a ; 박현종b ; 황보원c ; 김민식c ; 지범수c ; 이응석c, *
Precision Inspection of Secondary Cell Electrode Alignment with Camera Image Error Correction Algorithm using Dot Grid
Il-Jin Baea ; Hyeon-Jong Parkb ; Bo-Won Hwangc ; Min-Sic Kimc ; Bum-Soo Jic ; Eung-Suk Leec, *
aDepartment of Semiconductoy Equipment Engineering, Far East University
bDepartment of Advanced Material Engineering, Chungbuk National University
cGanghan Innosys, Co.

Correspondence to: *Tel.: +82-43-261-2442 E-mail address: eungsuk@cbnu.ac.kr (Eung-Suk Lee).

Abstract

Industrial cameras used in traditional machine vision are subject to errors because of the distortions induced in the images due to the camera lenses and various external factors. To calibrate these errors, a picture of the dot grid was taken and the center of the circle was calculated using the least squares circle-fitting method and the centroid method. In addition, an error map was generated using these methods, which can be used for generating a first-order equation with the least squares method. It is possible to calibrate the object point. In this work, an equation that can correct this error and perform an accurate measurement. It was applied to the stacking equipment of secondary batteries for automobiles to an algorithm that accurately measures the alignment of the cathode and the anode.

Keywords:

Calibration, Centroid, Dot grid, LSC, Secondary cell electrode

References

  • Lee, E. S., Lim, J. T., 2019, Method and System for Calibration using Dot Grid Pattern Image and Computer Readable Medium Storing a Program of the Same, KR patent 10-2019-0012960.
  • Lee, E. S., Kim, K. H., 2016, Method for Calibrating Distortion of Image in Camera, KR patent 10-2014-0079742.
  • Kim, S. H., 1998, Photo lens, SciencePlus, Republic of korea.
  • Zhang, Z., 2000, A Flexible New Technique for Camera Calibration, IEEE Trans. Pattern Anal. Mach. Intell., 22:11 1330-1334 [https://doi.org/10.1109/34.888718]
  • Kharrazi, M., Sencar, H. T., Memon, N., 2004, Blind Source Camera Identification, IEEE Int. Conf. on Image Proc. (ICIP ’04), 709-712 [https://doi.org/10.1109/ICIP.2004.1418853]
Il-Jin Bae

Assistant Professor in the Department of Semiconductor Equipment Engineering, Far East University,His research interest in Machine.

E-mail:baeiljin@gmail.com

Hyeon-Jong Park

Researcher, Department of Mechanical Engineering, Chungbuk National University.His research interest is Machine.

E-mail: phj8650@naver.com

Bo-Won Hwang

Researcher, Department of Mechanical Engineering,Ganghan Inosys.His research interest is Machine.

E-mail: dnjs20100@naver.com

Min-Sic Kim

Researcher, Department of Mechanical Engineering, Ganghan Inosys.His research interest is Machine.

E-mail: minsic16@naver.com

Bum-Soo Ji

Researcher, Department of Mechanical Engineering,Ganghan Inosys.His research interest is Machine.

E-mail: jauswi135@naver.com

Eung-Suk Lee

Researcher, Department of Mechanical Engineering, Ganghan Inosys.His research interest in Machine.

E-mail: eungsuk@cbnu.ac.kr