Bestimmung der Messunsicherheit für Koordinatenmesssysteme

Abstract

ZusammenfassungKoordinatenmesssysteme sind vielseitig einsetzbar zur Prüfung geometrischer Merkmale an komplexen, dreidimensionalen Werkstücken. Eine wirkungsvolle Qualitätssicherung ist allerdings nur dann möglich, wenn ihre Eignung für die konkrete Messaufgabe nachgewiesen ist. Die DIN EN ISO 14253

Convergence Behaviour of Numerical Measurement Uncertainty Evaluation using a Virtual Metrological Computed Tomography System

“…For the numerical uncertainty evaluation of tactile measurements, a number of 200 trials was used until instabilities of the results were detected. Therefore, the approach has been amended by a dynamic stability criterion [3]. This shows the need of analysing convergence behaviour for numerical uncertainty evaluation -especially in the case of a reduced number of trials.…”

“…is regarded as the measurand for which the associated measurement uncertainty should be evaluated, then the approach of GUM Supplement 1 [5] can be applied directly 3 . If p y cor , p y and p −b are the respective probability densities, then [10,Theorem 14.19]:…”

“…systematic error correction [12] or numerical uncertainty evaluation according to GUM Supplement 1 [5]. The latter is state of the art for tactile coordinate measurements [3]. For Computed Tomography (CT), this is currently not the case [18].…”

“…3.1] which is currently not state of the art for dimensional CT measurements. Therefore, we discuss both the case of uncorrected measured 10th…”

“…Which might again include systematic effects and might in the future be evaluated based on experience in the sense of a Type B evaluation according to the GUM[4] 3. This implicitly assumes that b has no systematic effects -which an imperfect digital twin of a measurement device can in general be expected to have.…”