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Proceedings Paper

Measurement of 6-DOF displacement of rigid bodies through splitting a laser beam: experimental investigation
Author(s): Won Shik Park; Hyungsuck Cho; Yong-Kyu Byun; Noh Yeol Park
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Paper Abstract

12 In this paper, a new measuring system is proposed which can measure 6-DOF motion of rigid bodies. Its measurement principle is based on detection of laser beam reflected from a specially fabricated mirror whose shape is a triangular pyramid having an equilateral cross-sectional shape. The 3- facet mirror is mounted on the object whose 6-DOF displacement is to be measured. The measurement is operated by a laser-based optical system composed of a 3-facet mirror, a laser source, three position-sensitive detectors (PSD). In the sensor system, three PSDs are located at three corner points of a triangular formation, which is an equilateral triangular formation lying parallel to the reference plane. From this arrangement, 6-DOF displacement of any object can be simply determined. In this paper, we model the relationship between the 6-DOF displacement of the object and the outputs of three PSDs. A series of experiments is performed to demonstrate the effectiveness of the proposed method. The experimental results show that the proposed sensing system can be an effective means of obtaining 3D position and orientation of arbitrary objects.

Paper Details

Date Published: 12 February 2001
PDF: 12 pages
Proc. SPIE 4190, Optomechatronic Systems, (12 February 2001); doi: 10.1117/12.417236
Show Author Affiliations
Won Shik Park, Mando Corp. (South Korea)
Hyungsuck Cho, Korea Advanced Institute of Science and Technology (South Korea)
Yong-Kyu Byun, Samsung Advanced Institute of Technology (South Korea)
Noh Yeol Park, Samsung Advanced Institute of Technology (South Korea)

Published in SPIE Proceedings Vol. 4190:
Optomechatronic Systems
Hyungsuck Cho; George K. Knopf, Editor(s)

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