Large-Scale Metrology – An Update

Estler, William T.; Edmundson, K. L.; Peggs, G.N.; Parker, David H.

doi:10.1016/s0007-8506(07)61702-8

Cited by 219 publications

(128 citation statements)

References 63 publications

Supporting

Mentioning

122

Contrasting

Order By: Relevance

“…Practitioners and instrument vendors in large volume metrology have been aware of these limitations for some time [2][3][4]. The laser tracker is one of the most widely used instruments for coordinate measurement over several tens of metres.…”

Section: Introductionmentioning

confidence: 99%

Thermal compensation for large volume metrology and structures

Yang

Ross-Pinnock

Muelaner

et al. 2017

Int. J. Metrol. Qual. Eng.

View full text Add to dashboard Cite

Abstract. Ideally metrology is undertaken in well-defined ambient conditions. However, in the case of the assembly of large aerospace structures, for example, measurement often takes place in large uncontrolled production environments, and this leads to thermal distortion of the measurand. As a result, forms of thermal (and other) compensation are applied to try to produce what the results would have been under ideal conditions. The accuracy obtained from current metrology now means that traditional compensation schemes are no longer useful. The use of finite element analysis is proposed as an improved means for undertaking thermal compensation. This leads to a "hybrid approach" in which the nominal and measured geometry are handled together. The approach is illustrated with a case study example.

show abstract

Section: Introductionmentioning

confidence: 99%

Thermal compensation for large volume metrology and structures

Yang

Ross-Pinnock

Muelaner

et al. 2017

Int. J. Metrol. Qual. Eng.

View full text Add to dashboard Cite

show abstract

“…Last decades has shown a great deal of applications of LSDM, involving different arenas of technology, ranging from civil and industrial architecture to aerospace engineering. [1][2][3][4][5][6][7][8][9] Typical applications refer to the measurement of large machines and structures, such as for example in the aeronautic and shipbuilder industry, but also in the field of topographical and architectural surveying. [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] A branch of application, which is often neglected by the scientific literature when referring to LSDM, concerns the tracking of objects in movement in large spaces, such as for examples warehouses or industrial plants, or even over the territory.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Large-scale dimensional metrology (LSDM): from tapes and theodolites to multi-sensor systems

Franceschini

Galetto

Maisano

et al. 2014

Int. J. Precis. Eng. Manuf.

View full text Add to dashboard Cite

Last decades witness an increasing interest in Large-Scale/Large-Volume Dimensional Metrology (LSDM). Many fields of application, ranging from construction to shipbuilding and aerospace, have shown more and more accurate and versatile systems for geometric control and tolerancing. Especially in the last ten years, optical technology has registered a fundamental step forward both in terms of metrological performances, versatility and convenience of use. This is further demonstrated by the current large diffusion of laser tracker and photogrammetric systems. The growth is also complemented by the development of new standards, even though a comprehensive body specific for LSDM is still lacking. The twofold aim of the present survey is to present a bibliographical and bibliometric analysis of the field and to propose a scheme of classification of the main current approaches. As an output of this paper, a "LSDM Multi-perspective Model" is introduced, according to which dominant technologies and restrictions are analyzed with the aim of individuating current lacks and defining the roadmap for future development of new instruments and systems.

show abstract

“…Commonly used instruments include laser trackers, electronic theodolites, photogrammetry systems and laser radar. Industrial applications necessitate either a combination of various measurement devices or the relocation of a single instrument throughout the measurement process in order to acquire complete data [1]. The foremost reason for using a combination of measurement systems is to overcome physical constraints.…”

Section: Introductionmentioning

confidence: 99%

“…The transformation between two Cartesian coordinate systems can be thought of as the result of a rigid-body motion. Therefore, the transformation parameters can be decomposed into a 3 3 × rotation matrix R and a 1 3 × translation vector T. There are three degrees of freedom to translation vector T. Rotation matrix R has another three degrees of freedom (direction of the axis about which the rotation takes place plus the angle of rotation about this axis). Singular Value Decomposition (SVD) presents a mature closed-form solution to the least-squares problem of absolute orientation [16].…”

mentioning

confidence: 99%

Fusion Estimation of Point Sets from Multiple Stations of Spherical Coordinate Instruments Utilizing Uncertainty Estimation Based on Monte Carlo

Zhang¹,

Qu²

2012

Measurement Science Review

View full text Add to dashboard Cite

Multiple instrument stations, based on spherical coordinate measurements, are often used in the measurement of large objects. A data fusion method is proposed to derive optimal estimations of the positions of the object features, measured by more than one device. First, each device has a dedicated coordinate system that is linked together through the measurement of common points. Second, the weighted mean coordinates are derived. The covariance matrix of the sensory, covering of the radial distance and the angles, is propagated to get a weight matrix. Third, a nonlinear function is minimized to determine the optimized coordinate of the points. Monte Carlo error propagation is utilized to estimate the uncertainty of the fusion points. Simulation of the fusion algorithms is performed using laser tracking and laser radar. The fusion algorithm experiments are performed using two laser tracking stations. Simulation and experiments prove that the fusion method improves the precision of the measurements of an object's location, due to incorporating the degree of uncertainty for each measurement point.

show abstract

Large-Scale Metrology – An Update

Cited by 219 publications

References 63 publications

Thermal compensation for large volume metrology and structures

Thermal compensation for large volume metrology and structures

Large-scale dimensional metrology (LSDM): from tapes and theodolites to multi-sensor systems

Fusion Estimation of Point Sets from Multiple Stations of Spherical Coordinate Instruments Utilizing Uncertainty Estimation Based on Monte Carlo

Contact Info

Product

Resources

About