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Development of a high-accuracy multi-sensor, multi-target coordinate metrology system using frequency scanning interferometry and multilateration
Author(s): B. Hughes; M. A. Campbell; A. J. Lewis; G. M. Lazzarini; N. Kay
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Paper Abstract

We present a novel coordinate measurement system based on a combination of frequency scanning interferometry and multilateration. The system comprises a number of sensors (minimum of four) that surround the measurement volume. Spherical glass retro-reflectors act as targets that are used to define the points in space to be measured. The sensors all measure the absolute distance to all targets simultaneously. The resulting distances are then used to compute the coordinates of the targets and other systematic parameters such as the sensor locations. Initial experimental comparison with a commercial laser tracker has shown that the proposed system is capable of achieving coordinate uncertainties of the order of 40 μm in a measurement volume of 10 m × 5 m × 2.5 m. The system is self-calibrating, inherently traceable to the international system of units (the SI) and computes rigorous coordinate uncertainty estimates.

Paper Details

Date Published: 26 June 2017
PDF: 9 pages
Proc. SPIE 10332, Videometrics, Range Imaging, and Applications XIV, 1033202 (26 June 2017); doi: 10.1117/12.2273644
Show Author Affiliations
B. Hughes, National Physical Lab. (United Kingdom)
M. A. Campbell, National Physical Lab. (United Kingdom)
A. J. Lewis, National Physical Lab. (United Kingdom)
G. M. Lazzarini, National Physical Lab. (United Kingdom)
N. Kay, National Physical Lab. (United Kingdom)


Published in SPIE Proceedings Vol. 10332:
Videometrics, Range Imaging, and Applications XIV
Fabio Remondino; Mark R. Shortis, Editor(s)

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