Hughes, E B; Ferrucci, M; Forbes, A B (2015) Preliminary investigation into the use of a network-based technique for calibration of 3D laser scanners. NPL Report. ENG 59

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Abstract

This report details a preliminary investigation into applying self-calibration techniques to a Surphaser 3D laser scanner in order to determine the geometrical alignment and angle encoder error parameters. The method requires a network of spherical targets to be scanned from different instrument locations and the resulting data bundled together using bespoke software that determines the target and instrument locations, the model parameters and the uncertainties associated with the results. The 18 parameter error model used to describe the scanner was developed by NIST. We show that 16 of the parameters can be determined by scanning a network of fixed targets from four or more different locations of the instrument. The remaining two parameters were found to be correlated. The scanner tested was a Surphaser model 25HSX IR-X, the network was spread over a volume of approximately 4.9 m x 6.7 m x 3.8 m. The target coordinates uncertainties ranged from 26 µm to 144 µm, and the range, azimuth and elevation uncertainties was estimated to be 107 µm, 3.8 arc seconds and 7.1 arc seconds respectively.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	ENG 59
Keywords:	3D scanner, spef calibration, network test
Subjects:	Engineering Measurements Engineering Measurements > Dimensional
Last Modified:	02 Feb 2018 13:13
URI:	http://eprintspublications.npl.co.uk/id/eprint/6813

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