Sensitivity Of A 3-D Surface Mapping System
To Environmental Perturbations
Author(s)
J. W. McBride, M Hill, J. Loh & D. Zhang
Abstract
Sensitivity of a 3-D surface mapping system to
environmental perturbations
J.W. McBride, M. Hill, J. Loh & D. Zhang
Mechanical Engineering, University of Southampton, UK
Abstract
A newly developed three-axes coordinate measurement machine, coupled with a
confocal laser sensor, has been housed in a temperature-controlled laboratory.
Initial results of three-dimensional (3-D) measurements taken off a NAMAS
(TVational Accreditation of Measurement and Sampling) certified sphere were
found to vary significantly with large errors. Evaluation of the possible sources
of errors included drift in ambient temperature, positioning inaccuracies, and
mechanical set-up errors such as orthogonality and straightness of axes. This
paper investigates the sensitivity of the measurement system towards
environmental perturbations, looking particularly at the influence of temperature
drift. The laboratory's temperature was logged over a period of time and the
data subsequently charted. Bas
Keywords
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