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http://dx.doi.org/10.3795/KSME-A.2009.33.5.529

Developement of a System for Glass Thickness Measurement  

Park, Jae-Beom (충북대학교 대학원 기계공학부)
Lee, Eung-Suk (충북대학교 기계공학부)
Lee, Min-Ki (충북대학교 대학원 기계공학부)
Lee, Jong-Gun (충북대학교 대학원 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.33, no.5, 2009 , pp. 529-535 More about this Journal
Abstract
This paper describes a measuring device of glass thickness using machine vision and image processing techniques on real-time. Today, the machine vision enable to inspect fast and exactly than human's eyes. The presented system has advantages of continuous measurement, flexibility and good accuracy. The system consists of a laser diode, a CCD camera with PC. The camera located on the opposite side of the incident beam measures the distance between two reflected laser beams from the glass top and bottom surface. We apply a binary algorithm to convert and analyze the image from camera to PC. Laser point coordination by border tracing algorithm is used to find the center of beam circle. The measured result was compared with micrometer and showed 0.002mm accuracy. Finally, the errors were discussed how to minimize the influence of glass wedge angle and angular error of moving stage.
Keywords
Machine Vision; Snell's Law; Glass Thickness;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 0
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1 Yamauchi, H. and Nakayama, M., 1980, 'An Automatic Measurement of Glass Thickness,' Journal of Non-Crystalline Solids, V.38/39 pt.2, pp. 955-960   DOI   ScienceOn
2 Lin, X., Klette, G., Klette, R., Craig, J. and Dean, S., 2003, 'Accurately Measuring the Size of the Pupil of the Eye,' Image and Vision Computing New Zealand
3 Gander, W., Golub, G. H. and Strebel, R., 1994, 'Least Squares Fitting of Circle and Ellipse,' BIT Numerical Mathematics, Springer. pp. 987-996   DOI
4 Lee, C. H. and Cho, T. D., 2003, 'A Study on the End Mill Wear Detection by the pattern Recognition Method in the Machine Vision,' Journal of the Korean Society of Precision Engineering, Vol. 20, No. 4, pp. 223-229   과학기술학회마을
5 Takashi Fukano and Ichirou Yamagunchi., 1999, 'Wavelength Scanning Confocal Interference Microscope For Separate Measurement Of Refractive Index And Geometrical Thickness,' SPIE, Vol. 3740, Issue 6, pp. 30-33   DOI
6 Tam, A.C. and Schroeder, H., 1989, 'Development of Noncontact Optical Measurement System for Gap,' Thickness and Vibration, Vol. 25, pp. 2629-2638
7 Jeon, H. M. and Choi, W. Y., 2001 'A Fast Algorithm for the Circular Object Detection Using the Hough Transform,' Journal of Research Institute of Industrial Technology, Vol. 20, pp. 721-726
8 May, A. D. and Stephan, G., 1989, 'Stability of Polarized Modes in a Quasiisotropic Laser,' J. Opt. Soc, Am. B, Vol. 8, pp. 1236-1243   DOI