Estimation of uncertainty in three-dimensional coordinate measurement by comparison with calibrated points


This paper details a method of estimating the uncertainty of dimensional measurement for a three-dimensional coordinate measurement machine. An experimental procedure was developed to compare three-dimensional coordinate measurements with calibrated reference points. The reference standard used to calibrate these reference points was a fringe counting interferometer with a multilateration-like technique employed to establish three-dimensional coordinates. This is an extension of the established technique of comparing measured lengths with calibrated lengths. Specifically a distributed coordinate measurement device was tested which consisted of a network of Rotary-Laser Automatic Theodolites (R-LATs), this system is known commercially as indoor GPS (iGPS). The method was found to be practical and was used to estimate that the uncertainty of measurement for the basic iGPS system is approximately 1 mm at a 95% confidence level throughout a measurement volume of approximately 10 m × 10 m × 1.5 m. © 2010 IOP Publishing Ltd.

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Divisions: Aston University (General)
Additional Information: © 2010 IOP Publishing Ltd. Results given in this paper were obtained using the original Workspace software and a typical 4 transmitter setup. Further testing has shown that uncertainty may be reduced by using newer software versions, and more complicated configurations with more hardware.
Uncontrolled Keywords: CMM,coordinate measuring machine,coordinate uncertainty,IGPS,indoor GPS,spatial analyzer,USMN,Applied Mathematics,Instrumentation
Publication ISSN: 1361-6501
Last Modified: 18 Mar 2024 08:14
Date Deposited: 21 Sep 2015 14:35
Full Text Link: http://iopscien ... 233/21/2/025106
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2010-01-19
Authors: Muelaner, J.E.
Wang, Z.
Martin, O.
Jamshidi, J.
Maropoulos, P.G. (ORCID Profile 0000-0001-6525-6216)



Version: Accepted Version

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