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An SI-traceable multilateration coordinate measurement system with half the uncertainty of a laser tracker
LCM Laboratoire Commun de Métrologie, France.
LCM Laboratoire Commun de Métrologie, France.
LCM Laboratoire Commun de Métrologie, France.
RISE Research Institutes of Sweden, Safety and Transport, Measurement Technology.
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2023 (English)In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 34, no 6, article id 065016Article in journal (Refereed) Published
Abstract [en]

We have validated the performance of a prototype coordinate measurement system based on multilateration by comparing it to a laser tracker, i.e. a well-proven instrument widely used in the industry. After establishing the uncertainty budget of the different systems, we performed position measurements with both instruments on common targets. Using the estimated uncertainties associated with the measurements, we found that the multilateration system provided lower position uncertainties than the laser tracker: on average 18 µm versus 33 µm for distances up to 12 m. The uncertainties represented by confidence ellipsoids are compatible between the two systems: for confidence regions of 95% probability, they overlap as expected, i.e. in 94% of the cases. We also measured the length of a 0.8 m long reference scale bar with the multilateration system at an error of only 2 µm. This cross-comparison is a new and key step in the characterization of this SI-traceable multilateration system. © 2023 The Author(s).

Place, publisher, year, edition, pages
Institute of Physics , 2023. Vol. 34, no 6, article id 065016
Keywords [en]
coordinate measurement system, large volume metrology, laser tracker, multilateration, Budget control, Coordinate measuring machines, Uncertainty analysis, Confidence region, Coordinate measurement systems, Large volumes, Multilateration system, Performance, Position uncertainties, Uncertainty, Uncertainty budget, Time difference of arrival
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-64315DOI: 10.1088/1361-6501/acc26aScopus ID: 2-s2.0-85150897786OAI: oai:DiVA.org:ri-64315DiVA, id: diva2:1755183
Note

Funding details: Horizon 2020 Framework Programme, H2020; Funding details: European Metrology Programme for Innovation and Research, EMPIR; Funding text 1: This work was partially funded by Joint Research Project (JRP) 17IND03 LaVA, project that has received funding from the European Metrology Programme for Innovation and Research (EMPIR) co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme.

Available from: 2023-05-05 Created: 2023-05-05 Last updated: 2024-03-03Bibliographically approved

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Herbertsson, MagnusBergstrand, Sten

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