Journal of Institute of Convergence Technology (융복합기술연구소 논문집)
- Volume 2 Issue 1
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- Pages.43-48
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- 2012
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- 2233-8667(pISSN)
Measuring Method of In-plane Position Based On Reference Pattern
레퍼런스 패턴 기반 면내 위치 측정 방법
- Jung, Kwang Suk (Department of Mechanical Engineering, Korea National University of Transportation)
- 정광석 (한국교통대학교 기계공학과)
- Received : 2012.04.12
- Accepted : 2012.05.02
- Published : 2012.05.31
Abstract
Generally, in-plane position of moving object is measured referring to the reference pattern attached to the object. From optical camera to magnetic reluctance probe, there are many ways detecting a variation of the periodical pattern. In this paper, the various operating principles developed for in-plane positioning are reviewed and compared each other. And, a novel method measuring large rotation as well as x, y linear displacements is suggested, including a detailed description of the overall system layout. It is a modified version of the surface encoder, which is a robust digital measuring method. From the surface encoder, the rotation of an object is measured indirectly through a compensated input of optical servo and independently of linear displacements. So, the operating range can be extended simply by enlarging the reference pattern, without magnifying the decoding units.