Task Specific Uncertainty in Coordinate Measurement

Wilhelm, Robert G.; Hocken, Robert J.; Schwenke, H.

doi:10.1016/s0007-8506(07)62995-3

Cited by 177 publications

(94 citation statements)

References 66 publications

(72 reference statements)

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“…According to Taylor and Kuyatt [4] measurement outcome should include a quantitative statement of its uncertainty for completeness and valid judgment of final results. When measurement uncertainty is associated with measurement of particular feature using specific measurement plan, it is known as task specific uncertainty [5]. Task specific uncertainty depends on number of factors such as sampling strategies, measuring object, probing technique, environmental conditions, evaluation software, measuring equipment, etc.…”

Section: Measurement Uncertainties Associated With Cmmmentioning

confidence: 99%

“…For instance, work of Weckenmann et al [6], where contributions of different uncertainties have been identified on CMM measurement results through measurement of car body. A comprehensive review of techniques in which Wilhelm et al [5] estimated task specific uncertainty for CMMs represent significant contribution in this area. Butler [9] identified measuring probe as one of the most important sources of error in CMM measurement results.…”

Section: Measurement Uncertainties Associated With Cmmmentioning

confidence: 99%

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New developments in coordinate measuring machines for manufacturing industries

Mian

Al-Ahmari

2014

Int. J. Metrol. Qual. Eng.

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Abstract. There have been substantial improvements in measurement systems in order to meet fluctuating market demands. This rapid change and development in measurement technology has primarily been governed by demands of accuracy and precision from aerospace, automotive and other manufacturing industries. Coordinate measuring machines (CMMs) available with different technologies and configurations has efficiently been fulfilling customer demands for more than a decade. Though, current CMMs can meet needs of rapid and increased demands of customers to a greater extent but still there is lot of scope for improvement and development in CMMs. The globalization of manufacturing has resulted in development of variety of complex products and miniaturization of mechanical components. The technology of micro/nanoscale 3D measurement is still a bottleneck for industries. Therefore, precise and accurate system which is flexible enough to deal with complexities of parts and micro & nano range products has to be investigated. In this paper, comprehensive review concerning CMMs with capabilities to measure micro/nano features has been presented. This work has also discussed different methods to estimate measurement uncertainty, as well as performance evaluation of CMMs. Moreover, novel concepts such as intelligent CMM, multi-sensor CMM, virtual CMM have been presented.

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Section: Measurement Uncertainties Associated With Cmmmentioning

confidence: 99%

Section: Measurement Uncertainties Associated With Cmmmentioning

confidence: 99%

New developments in coordinate measuring machines for manufacturing industries

Mian

Al-Ahmari

2014

Int. J. Metrol. Qual. Eng.

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show abstract

“…In the case study, coordinate measuring machines dominate the system of measurement, and experiments are carried out on the same machines that will be used in production to evaluate their capability; simulation of measurement capability is rarely used within an industrial context [28]. However, these experiments cannot be performed until prototypes have been manufactured, and the results cannot easily be generalised because they are highly sensitive to the measuring task [29]. It is therefore difficult to know whether a design change is likely to challenge the measurement system, even when employing the same technology.…”

Section: -Knowing What To Reusementioning

confidence: 99%

Identifying measurement knowledge and its relationship to engineering design

Saunders

Giudice

Swart

2014

Int. J. Metrol. Qual. Eng.

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Abstract. Capable measurement of the size and shape of components is a prerequisite for precision manufacturers. However, the design community may not fully consider measurement issues that could arise when components are manufactured, and the manufacturing community may not wholly appreciate the value that measurement data can bring to design. This paper investigates measurement knowledge in this relationship to find out if there are specific knowledge types that could be developed to improve the likelihood of fulfilling design intent. A proven systems-based approach was applied to an illustrative case to develop a model of knowledge flows and identify key knowledge types. For this case study, it was found that knowledge about measurement is dispersed and managed through a variety of practices which are relatively isolated from design. Furthermore, conflict was uncovered between the knowledge types, reinforcing the view that a more inclusive and integrated approach is required. In the course of the research, a novel methodology was developed in which group modelling was used to generate questions, rather than the more typical approach of grounding a systems model on interview data.

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“…Several methods for determining the measurement uncertainty of a specific measurement task were described in the review paper [4]. Some of these methods are documented in the ISO 15530 series of standards: the use of multiple strategy measurements without calibrated workpiece 15530-2 (deleted), the use of calibrated workpieces or standards 15530-3 [5], and the use of computer simulation 15530-4 [6].…”

Section: Introductionmentioning

confidence: 99%

Different Approaches in Uncertainty Evaluation for Measurement of Complex Surfaces Using Coordinate Measuring Machine

Vrba

Palenčár

Hadžistević

et al. 2015

Measurement Science Review

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This paper describes a methodology for uncertainty assessment for Coordinate Measuring Machine measurement of complex real work pieces from industry. The study applied two approaches (in scanning mode only) for estimating the measurement uncertainty with the support of Taguchi plan in the experiment containing five factors: scanning speed, sample density, probe configuration, scanning direction, and position of measuring object. In the first approach the uncertainty was estimated by measuring the basic geometric objects (primitives like sphere and torus) representing the decomposition of complex surfaces and in the second one a complex surface was treated as an unknown quantity. Calculated uncertainty Type A for both measurement tasks was in the range from 0.65 µm to 6.47 µm. Evaluation of the uncertainty Type B covered specifications of the machine and standard uncertainties derived from temperature effects. Total u B component was found to be in order of 0.4 µm. Future research will be directed towards the development and application of simulation methods

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Task Specific Uncertainty in Coordinate Measurement

Cited by 177 publications

References 66 publications

New developments in coordinate measuring machines for manufacturing industries

New developments in coordinate measuring machines for manufacturing industries

Identifying measurement knowledge and its relationship to engineering design

Different Approaches in Uncertainty Evaluation for Measurement of Complex Surfaces Using Coordinate Measuring Machine

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