Verification of an articulated arm coordinate measuring machine using a laser tracker as reference equipment and an indexed metrology platform

Acero, R.; Brau, A.; Santolaria, Jorge; Pueo, M.

doi:10.1016/j.measurement.2015.03.023

Cited by 30 publications

(22 citation statements)

References 34 publications

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“…(5) (6) where n is the number of repetitive measurements, j is the serial number of a repetitive mea- In formula (4), the mean is calculated from derivative sequence of random values. In general, we work with the sequence , from which we get the sequence .…”

Section: New Proceduresmentioning

confidence: 99%

“…12). Deviation borders can be also roughly estimated according to formula (6). They are shown in dashed lines ±2s.…”

Section: Principle Of Drawing the Deviation Chartmentioning

confidence: 99%

“…More details are provided by Castro and Burdekin [5]. Articulated Arm Coordinate Measuring Machine (AACMM) system uses increase in number of measured positions over shorter time [6]. Positioning accuracy is also influenced by the direction of impacting forces.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Elimination of Thermal Drift in Measuring the Positioning Accuracy of a Three Axis Milling Machine

Stejskal

Dovica

Demeč

et al. 2017

Adv. Sci. Technol. Res. J.

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The aim of this paper is to draw attention to more reliable verification method of positioning accuracy. The improvement lies in mathematical elimination of thermal impact during the measurement process. This thermal impact, always present during the motion of movable parts, is of a special systemic character. It increases the indefiniteness of measurement of the classic measurement method. This measurement uncertainty can be reduced by implementing the procedure introduced in this paper. The reduction can be achieved by separating the temperature impact from other sources of inaccuracy. Such separation is a very new solution. The methodology relies on mathematical processing and does not depend on the manner of accuracy measurement. The evaluation method also yields diagnostic information on the machine's condition. The experiments were performed with the use of laser interferometer.

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Section: New Proceduresmentioning

confidence: 99%

“…12). Deviation borders can be also roughly estimated according to formula (6). They are shown in dashed lines ±2s.…”

Section: Principle Of Drawing the Deviation Chartmentioning

confidence: 99%

See 1 more Smart Citation

Elimination of Thermal Drift in Measuring the Positioning Accuracy of a Three Axis Milling Machine

Stejskal

Dovica

Demeč

et al. 2017

Adv. Sci. Technol. Res. J.

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show abstract

“…The common digital measuring instrument includes a laser tracker [3,4], theodolite [5], iGPS [6,7], industrial camera [8,9], coordinate measuring machine (CMM) [10,11], and so on, which depends on transforming the relevant points into the reference coordinate system of a third party to fit the R-P&O of components [12]. Because of the indirect acquisition of R-P&O, this method involves a complex coordinate system transformation and unnecessary error [13].…”

Section: Introductionmentioning

confidence: 99%

A Parallel Ranging-Based Relative Position and Orientation Measurement Method for Large-Volume Components

2018

Journal of Sensors

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In this paper, a novel relative position and orientation (R-P&O) measurement method for large-volume components is proposed. Based on the method, the parallel distances between the cooperative point pairs (CPPs) are collected by multiple pairs of wireless ranging sensors which are installed on respective components and finally turned into the R-P&O. Accordingly, a measurement model is built and an algorithm is designed to solve the model, in which the radial basis function neural network (RBFNN) produces a preliminary solution by offline training and the differential evolution (DE) strategy finds the accurate solution by online heuristic searching. Furthermore, the crucial parameters and the performance of the algorithm are analyzed through simulating a virtual alignment process which proves that the RBFNN-DE algorithm can quickly and accurately find the global optimal solution in the whole effective workspace. Besides the theory study, a ranging device based on ultrasound has been developed along with a calibration method. Depending on the device, an experiment of actual alignment is implemented to verify the algorithm. Experimental results indicate that the error of R-P&O is no more than 4.1 mm and 0.32° when the ranging error is 0.1 mm, compared with the measurement result of indoor GPS (iGPS).

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“…The above-mentioned virtual geometric gauges are applied to reduce the number of test positions, avoid the measurement points randomly sampled on the virtual geometrical gauges surfaces according to the norms and improve the efficiency of verification procedure for PACMM. Acero et al [22] presented an indexed metrology platform combined with a calibrated ball bar gauge, which was applied in evaluating the performance of PACMM. A simplified and low-price length gauge [23] was applied in calibrating the kinematic structural parameters of PACMM and it had three degrees of freedom (DOFs) and a coefficient of low-thermal expansion.…”

Section: Introductionmentioning

confidence: 99%

A New Kinematic Model of Portable Articulated Coordinate Measuring Machine

Jia

et al. 2016

Applied Sciences

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Portable articulated coordinate measuring machine (PACMM) is a kind of high accuracy coordinate measurement instrument and it has been widely applied in manufacturing and assembly. A number of key problems should be taken into consideration to achieve the required accuracy, such as structural design, mathematical measurement model and calibration method. Although the classical kinematic model of PACMM is the Denavit-Hartenberg (D-H) model, the representation of D-H encounters the badly-conditioned problem when the consecutive joint axes are parallel or nearly parallel. In this paper, a new kinematic model of PACMM based on a generalized geometric error model which eliminates the inadequacies of D-H model has been proposed. Furthermore, the generalized geometric error parameters of PACMM are optimized by the Levenberg-Marquard (L-M) algorithm. The experimental result demonstrates that the measurement of standard deviation of PACMM based on the generalized geometric error model has been reduced from 0.0627 mm to 0.0452 mm with respect to the D-H model.

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Verification of an articulated arm coordinate measuring machine using a laser tracker as reference equipment and an indexed metrology platform

Cited by 30 publications

References 34 publications

Elimination of Thermal Drift in Measuring the Positioning Accuracy of a Three Axis Milling Machine

Elimination of Thermal Drift in Measuring the Positioning Accuracy of a Three Axis Milling Machine

A Parallel Ranging-Based Relative Position and Orientation Measurement Method for Large-Volume Components

A New Kinematic Model of Portable Articulated Coordinate Measuring Machine

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