Browse > Article
http://dx.doi.org/10.7735/ksmte.2012.21.1.058

Surface Encoding Method Based on the Superposed Pattern  

Jung, Kwang-Suk (한국교통대학교 기계공학과)
Park, Sung-Jun (한국교통대 기계공학과)
Publication Information
Journal of the Korean Society of Manufacturing Technology Engineers / v.21, no.1, 2012 , pp. 58-64 More about this Journal
Abstract
Instead of the surface pattern arranged repeatedly in two axial direction on a plane, we propose double patterns superposing two one-axial linear patterns as a reference target for surface encoding. A upper layer of the superposed pattern is the transparent glass with grooves cut in it at a fixed pitch. The position is sensed by detecting a shift of beam due to difference of a refractive index. And a lower layer is the aluminum with color-coated grooves. The amount of beam reflected on the layer varies according to its targeting position and is detected for encoding. For the above reference pattern, we can detect two-axial positions using only the single beam. Furthermore, the pattern size can be expanded with a size of the detector kept constant, meaning that the measured range can be expanded easily. In this paper, we review the existing optical encoding methods for grid pattern, and discuss the hardware implementation of the suggested surface encoding method.
Keywords
Geometric optic; Grid pattern; Reflectivity; Refractive index; Surface encoding;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Miller, G. L., 1990, Capacitively Incremental Position Measurement and Motion Control, US Patent: 4893071.
2 Butler, Z. J., Rizzi, A. A., and Hollis, R. L., 1998, "Integrated Precision 3-DOF Position Sensor for Planar Linear Motors," Proc. Int. Conf. on Robotics and Automation, pp. 2652-2658.
3 Brennemann, A. E., and Hollis, R. L., 1995, "Magnetic and Optical Fluorescence Position Sensing for Planar Linear Motor," Proc. Int. Conf. on Intelligent Robots and Systems, Vol. 3, pp. 101-107.
4 KEYENCE Corp., Application note, .
5 Lee, S. H., and Jung, K. S., 2008, "Precision Displacement Measurement using Astigmatism," J. of Korean Society Precision Engineering, Vol. 25, No. 7, pp. 87-94.
6 Lee, S. H., Jung, K. S., Park, E. S., and Shim, K. B., 2008, "Surface Encoder based on the Half-shaded Square Patterns (HSSP)," Int. J. of Precision Engineering and Manufacturing, Vol. 9, No. 3, pp. 82-84.
7 Kim, M. S., Park, S. J., Lee, S. H., and Jung, K. S., 2011, "Surface Encoding Methodology Capable of Measuring Large Rotation," Proc. of KSMTE Autumn Conf., pp. 146.
8 Kim, Y. S., Song, I. S., Jung, J. P., Han, J. H., and Youn, W. J., 2003, "A Study on Measurement of Linear Cycle Plane Positioning Accuracy of NC Lathe," Trans. of Korean Society of Manufacturing Technology Engineers, Vol. 12, No. 2, pp. 53-58.
9 Kim, S. W., Lee, H. S., Oh, J. S., and Lee, C. W., 1995, "A Fine Motion Mechanism of Dual Servo Control for Ultraprecision Positioning," Trans. of Korean Society for Mechanical Engineering, Vol. 19, No. 11, pp. 2875-2884.
10 Kim, W. J., and Trumper, D. L., 1998, "High-precision Magnetic Levitation Stage for Photolithography," Precision Engineering, Vol. 22, No. 2, pp. 66-77.   DOI   ScienceOn
11 Cho, W., Hyun, K. I., and Kim, J. H., 2008, "A Study on Real-time Measurement Method of Precision Stage Position Errors using Directly Probing Optical Device," Proc. of KSMTE Spring Conf., pp. 465-468.
12 Gao, W., Dejima, S., Yanai, H., Katakura, K., Kiyono, S., and Tomita, Y., 2004, "A Surface Motor- driven Planar Motion Stage Integrated with an XY${\theta}$z Surface Encoder for Precision Positioning," Precision Engineering, Vol. 28, No. 3, pp. 329-337.   DOI   ScienceOn
13 Lee, J. Y., Kim, M. J., Lee, S. S., and Jeon, E. C., 2004, "A Study on Curvature Radius Measurement using Laser Interferometer," Trans. of Korean Society of Manufacturing Technology Engineers, Vol. 13, No. 6, pp. 34-40.