Point-straight line distance as model for uncertainty evaluation of coordinate measurement

Płowucha, Wojciech

doi:10.1016/j.measurement.2018.11.008

Cited by 19 publications

(16 citation statements)

References 15 publications

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“…The ability to measure all the tolerances indicated on a technical drawing is the main reason why this is so. Also, measuring systems that work on the contact principle and some non-contact ones are characterized by high accuracy, precision and a narrow range of measurement uncertainty [2]. However, due to the possibility of faster measurement, CAD inspection, measurement of inaccessible places on the workpiece or measurement of small objects, the CMS with various noncontact probes is increasingly used.…”

Section: Introductionmentioning

confidence: 99%

The Analysis of Metrological Characteristics of Different Coordinate Measuring Systems

et al. 2023

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The aim of this paper is to examine the metrological characteristics of some of the most commonly used coordinate measurement systems in industry in a case study of the flatness error. The accuracy and measurement uncertainty of the coordinate measuring machine with contact probe, point by point mode and scanning mode, and with non -contact probe, then performance measuring arm, optical scanner and finally industrial computed tomography were analyzed. In order to exclude factors that affect the accuracy of measurement and measurement uncertainty, and are not part of the hardware structure of the CMS, the experiment was conducted on a reference workpiece and an independent software solution was used to estimate the error of flatness. The accuracy of measuring systems was determined as the difference between the reference value and the mean value of repeated measurements and the measurement uncertainty was determined according to the instructions for estimating the measurement uncertainty GUM. The results of the research showed high metrological performance of the coordinate measuring machine and the optical scanner for this measuring task. Also, it was found that industrial computed tomography gives a very large measurement error and that the measurement uncertainty is very difficult to determine.

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Section: Introductionmentioning

confidence: 99%

The Analysis of Metrological Characteristics of Different Coordinate Measuring Systems

et al. 2023

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“…Branko [13] investigated the effect of environment temperature on measurement uncertainty in CMM measurements and results show that temperature has significant effect dimensional measurement and less effect on roundness measurement.Płowucha [14]presented a point to straight line distance model to evaluate the measurement uncertainty using CMM. Senin et al [15]proposed a statistical model with of Monte Carlo simulation to estimate the measurement uncertainty in coordinate measuring system.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Uncertainty in Angle Measurement performed on a Coordinate Measuring Machine

Rajamani¹,

Vignesh²,

Mouliprasanth³

2021

Proceedings of the First International Conference on Combinatorial and Optimization, ICCAP 2021, December 7-8 2021, Chennai, In

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Coordinate Measuring Machine (CMM) is a universally accepted instrument that is widely used for inspection in industries and laboratories. Evaluation of uncertainty in dimensional measurement is very important for any measurement process. The components and the parts of the mechanical systems must have the accurate dimensions to meet the functional requirements. The environmental conditions and measurement methodhighly influence the accuracy of measurement process.This paper focuses on estimating the uncertaintyin angle measurementscarried out using CMM. In this study, anglegauge blocks are used as the reference materials for assessing the uncertainty in measurement using a CMM. An uncertainty estimation is carried out according to the guide to the expression of uncertainty in measurement (GUM). The influence of position accuracy, environment temperature, vibration, measurement and probing strategies are analysed and uncertainty in angle measurement is estimated as 40 arc seconds.

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“…It is well known that Part 1 of the ISO 15530 standard [6] provides clear uncertainty evaluation methods for sensitivity analysis [7], use of calibrated artefacts [8] as well as those for users of Virtual Coordinate Measuring Machines (VCMM) [9][10][11]. Practically, the best method for estimating measurement uncertainty is the one based on the use of calibrated artefacts described in [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…However, it is inherently not suitable for easing up the calculation method and still has not been implemented in measurements of calibration uncertainty for a variety of workpieces. In [16] there is presented an uncertainty evaluation model (distance between a point and a plane defined by 3 points) which enables uncertainty evaluation for different measuring tasks. The limitation of this approach is that the uncertainty assessment technique would only be applicable to estimating the discussed cases of position and out-of-plane parallelism of axes.…”

Section: Introductionmentioning

confidence: 99%

“…The conducted experiments show that precision significance of uncertainty determined by the GUM is unreliable as the expanded uncertainty increased by 11.1% compared to the actual results. The paper [7] shows an application of the sensitivity approach to evaluation of measurement uncertainty of straightness, coaxiality, concentricity, position of axis, runout and distance between axes. Task specific uncertainty assessment techniques are still up-to-date and investigated by researchers [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Metrology and Measurement Systems

2021

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Reliable measurement uncertainty is a crucial part of the conformance/nonconformance decision-making process in the field of Quality Control in Manufacturing. The conventional GUM-method cannot be applied to CMM measurements primarily because of lack of an analytical relationship between the input quantities and the measurement. This paper presents calibration uncertainty analysis in commercial CMM-based Coordinate Metrology. For the case study, the hole-plate calibrated by the PTB is used as a workpiece. The paper focuses on thermo-mechanical errors which immediately affect the dimensional accuracy of manufactured parts of high-precision manufacturers. Our findings have highlighted some practical issues related to the importance of maintaining thermal equilibrium before the measurement. The authors have concluded that the thermal influence as an uncertainty contributor of CMM measurement result dominates the overall budgets for this example. The improved calibration uncertainty assessment technique considering thermal influence is described in detail for the use of a wide range of CMM users.

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Point-straight line distance as model for uncertainty evaluation of coordinate measurement

Cited by 19 publications

References 15 publications

The Analysis of Metrological Characteristics of Different Coordinate Measuring Systems

The Analysis of Metrological Characteristics of Different Coordinate Measuring Systems

Evaluation of Uncertainty in Angle Measurement performed on a Coordinate Measuring Machine

Metrology and Measurement Systems

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