Design, Implementation, and Testing of Advanced Virtual Coordinate-Measuring Machines

Abstract

Advanced virtual coordinate-measuring machines (CMMs) (AVCMMs) have recently been developed at Brunel University, which provide vivid graphical representation and powerful simulation of CMM operations, together with Monte-Carlo-based uncertainty evaluation. In an integrated virtual environment, the user can plan an inspection strategy for a given task, carry out virtual measurements, and evaluate the uncertainty associated with the measurement results, all without the need of using a physical machine. The obtained estimate of uncertainty can serve as a rapid feedback for the user to optimize the inspection plan in the AVCMM before actual measurements or as an evaluation of the measurement results performed. This paper details the methodology, design, and implementation of the AVCMM system, including CMM modeling, probe contact and collision detection, error modeling and simulation, and uncertainty evaluation. This paper further reports experimental results for the testing of the AVCMM.

Automated Coordinate Measuring Machine Inspection Planning Knowledge Capture and Formalization

“…The operator uses a hand-held haptic device to input the measurement points and a collision-free inspection path is generated. Based on the previous work, Wang et al [33] attempted to address the sub-task of probe head accessibility with the aid of a haptic CMM while a capability for calculating associated uncertainties was added by Hu et al [34]. An "augmented virtuality" integrated CMM was proposed [35] which is operated either by a marker-less gesture recognition algorithm or using two joysticks.…”

Evaluación dimensional del proceso de digitalización 3D por fotogrametría de un patrón de calibración propio

“…Hoy en día existe suficiente oferta de digitalizadores 3D en el mercado, y al mismo tiempo, nuevas tecnologías emergen implementando mejores dispositivos, abaratando componentes y optimizando cálculos. Las limitaciones de algunos sistemas han sido objeto de investigaciones 1,2,3 . Aunque la implementación de la digitalización 3D ha llegado completamente a los trenes productivos 4,5,6 a partir de máquinas de coordenadas, en el caso de México no han penetrado significativamente su mercado.…”

Digital Twin of an Optical Measurement System

“…Based on a Monte Carlo method, multiple virtual measurements are performed in order to determine the measurement uncertainty. Digital twins of coordinate measuring machines (CMMs) have been extensively researched in the past [ 6 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]; however, research into digital twins of optical systems is still lacking due to the high number of error contributors [ 17 ]. This paper presents a method to obtain and simulate a digital twin of a laser line scanner (LLS) mounted on a CMM.…”