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

Jody E. Muelaner, Zhijin Wang, Oliver Martin, Jafar Jamshidi, Paul G. Maropoulos

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)
175 Downloads (Pure)

Abstract

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.
Original languageEnglish
Article number025106
Number of pages9
JournalMeasurement Science and Technology
Volume21
Issue number2
Early online date19 Jan 2010
DOIs
Publication statusPublished - Feb 2010

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