Possibilities for minimising uncertainty of dissimilar materials gauge blocks calibration by mechanical comparison

Godina, Andrej; Vuherer, Tomaž; Ačko, Bojan

doi:10.1016/j.measurement.2011.10.018

Cited by 6 publications

(3 citation statements)

References 6 publications

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“…From Edlén's equation it can be calculated that a change of 1 °C or 380 Pa would yield an error of approximately one part per million, while the humidity would have to change by almost 100 %. Similarly, the material of line scales and gauge blocks respond to temperature change with expansion: a 1 °C change in steel would introduce an error of approximately ten parts per million in the distance measured, while with precise temperature measurement (with a resolution of 0.01 K), this error can be reduced to the level 10 -7 [26][27][28][29][30]. By using air-conditioning to maintain smoke/dust free air under normal conditions (20 °C, 101.325 kPa and 50 % humidity), precise sensing of these air parameters, and by automatic wavelength-, dead path-and material-thermal compensation, the overall uncertainty less than 1 µm/m can be attained [25].…”

Section: Resultsmentioning

confidence: 99%

Optimization of Calibrating HeNe Laser Interferometers by Sample-Period Simulation

Lipus¹,

Matus²,

Ačko³

2013

Int. j. simul. model.

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The calibration procedure for the frequency determination of HeNe laser interferometers used for length metrology is described and high-level traceability at the Metrology Institute of the Republic of Slovenia (MIRS) consistent with the Mutual Recognition Arrangement drawn up by the International Committee for Weights and Measures (CIPM MRA) is presented in the article. The analyses of radiation frequency regarding stabilization time, repeatability and reproducibility are given for a case of an industrial and of a laboratory HeNe laser interferometer. Allan-deviation calculations at different sampling periods provided information for setting the optimal sampling period and proved that 100 000 samples at onesecond or 10 000 samples at ten-second long period are usually the most appropriate sets for one-day calibration measurements.

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Section: Resultsmentioning

confidence: 99%

Optimization of Calibrating HeNe Laser Interferometers by Sample-Period Simulation

Lipus¹,

Matus²,

Ačko³

2013

Int. j. simul. model.

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“…12. The experiment data before and after compensation are listed in Tables 3 and 4 which show that within the range of (£200-£1000 mm) Â 250 mm the measurement expanded uncertainty [13][14][15][16] (k uc , k = 2, the value of k is determined by a confidence interval valued at 0.95 and a degree of freedom valued at 60 on the T distribution table) of the developed AACMM has been reduced from 150 lm to 10 lm.…”

Section: Error Compensation Of the Aacmmmentioning

confidence: 99%

The calibration and error compensation techniques for an Articulated Arm CMM with two parallel rotational axes

Chen

Qiu

2013

Measurement

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“…Geometric imperfections of end standard surfaces causes the most pronounced variation in gauge length which represents a value that should be considered. The slight deviations in end standard geometry by either imperfect flatness or parallelism of measuring faces have a gross contribution in an added uncertainty for the measured length [2,12]. Figure 3 shows a plan of three experimental sets preserved for calibration.…”

Section: The Conceptual Measurement Processmentioning

confidence: 99%

Uncertainty Estimation due to Geometrical Imperfection and Wringing in Calibration of End Standards

Ali

Naeim

2013

ISRN Optics

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Uncertainty in gauge block measurement depends on three major areas, thermal effects, dimension metrology system that includes measurement strategy, and end standard surface perfection grades. In this paper, we focus precisely on estimating the uncertainty due to the geometrical imperfection of measuring surfaces and wringing gab in calibration of end standards grade 0. Optomechanical system equipped with Zygo measurement interferometer (ZMI-1000A) and AFM technique have been employed. A novel protocol of measurement covering the geometric form of end standard surfaces and wrung base platen was experimentally applied. Surface imperfection characteristics of commonly used 6.5 mm GB have been achieved by AFM in 2D and 3D to be applied in three sets of experiments. The results show that there are obvious mapping relations between the geometrical imperfection and wringing thickness of the end standards calibration. Moreover, the predicted uncertainties are clearly estimated within an acceptable range from 0.132 µm, 0.164 µm and 0.202 µm, respectively. Experimental and analytical results are also presented.

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Possibilities for minimising uncertainty of dissimilar materials gauge blocks calibration by mechanical comparison

Cited by 6 publications

References 6 publications

Optimization of Calibrating HeNe Laser Interferometers by Sample-Period Simulation

Optimization of Calibrating HeNe Laser Interferometers by Sample-Period Simulation

The calibration and error compensation techniques for an Articulated Arm CMM with two parallel rotational axes

Uncertainty Estimation due to Geometrical Imperfection and Wringing in Calibration of End Standards

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