The uncertainty of diameter calibrations with the comparator for diameter and form

Neugebauer, Michael

doi:10.1088/0957-0233/9/7/008

Cited by 11 publications

(6 citation statements)

References 4 publications

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“…According the GUM, the uncertainty in diameter measurement is calculated by applying the law of propagation of uncertainty [9] to equation (1). Since the same displacement sensors are used for the measurement of the gauge block and diameter specimen, the measured displacement values are partially correlated, and their correlated and uncorrelated components are well analyzed in [5]. The magnitude of each uncertainty component can be estimated through some experiments or referencing related materials.…”

Section: The Uncertainty Of Diameter Measurementsmentioning

confidence: 99%

“…Some laboratories apply a coordinate measuring machine to diameter measurements, but its performance is usually limited because it is not specially designed for the calibration of diameter standards. Therefore, several national metrology institutes (NMIs) designed and fabricated their own calibration system using a laser interferometer [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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An interferometric Abbe-type comparator for the calibration of internal and external diameter standards

Kim¹,

Kim²,

Kang³

et al. 2010

Meas. Sci. Technol.

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We developed an Abbe-type comparator using a laser interferometer and a linear variable differential transformer (LVDT) probe as displacement sensors, which can measure the diameter of ring and plug gauges up to 300 mm. The measurement system is configured according to the Abbe principle, and consists of translation stages, a laser interferometer, an LVDT probe and an electronic controller. The main translation stage is made by using a precision ceramic guide and air bearing pads, and is driven by a backlash-free lead screw and a micro-stepping motor. The laser interferometer measures the displacement of a moving mirror aligned with the probe coaxially. The environmental effect is corrected automatically during the measurement. The effective diameter of the probe ball is calibrated using a reference gauge block. The performance of each component was evaluated through experiments and the measurement uncertainty of the overall system was analyzed. We measured three diameter artifacts, which are 11.95 mm and 100 mm ring gauges and a 98.5 mm plug gauge, and compared the measured values with the calibrated ones. They were consistent with each other within 0.3 μm, which is less than the expanded measurement uncertainty (k = 2).

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Section: The Uncertainty Of Diameter Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An interferometric Abbe-type comparator for the calibration of internal and external diameter standards

Kim¹,

Kim²,

Kang³

et al. 2010

Meas. Sci. Technol.

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show abstract

“…The distances of the various minima from center of the pattern are then given by B=±n,2n, ±3n, ........ .. (13) or The distances of the various minima from center of the pattern are then given by B=±n,2n, ±3n, ........ .. (13) or…”

Section: Theorymentioning

confidence: 99%

Measurement of Wire Diameter by Optical Diffraction

Khodier

2003

J Opt

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A combined interference and diffraction pattern, in the form of equidistant interference fringes, resulting from illuminating a vertical metallic wire by a laser beam is analyzed to measure the diameter of four standard wires. The diameters range from 170 to 450 J1In. It is found that the error in the diameter measurements increasesjor small metallic wires andfor small distances between the wire and the screen due to scattering effects. The intensity of the incident laser beam was controlled by a pair of sheet polaroids to minimize the scattered radiation. The used technique is highly sensitive, but requires controlled environmental conditions and absence of vibration effects. The expanded uncertainty is calculated and found to decrease from ±1.45 rnm for the wire of nominal diameter of 170 J. 'm, to ±0.57 Jl17Ifor the diameter, 450 J1In.

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“…The pressure is defined as the ratio of the total downward gravitational force to the A 0 , where A 0 is most commonly determined through a comparison against another DWPB or a mercury manometer, although dimensional characterizations have also been used [5][6][7][8][9]. The fact that the force can be measured with greater accuracy than area is well known.…”

Section: Introductionmentioning

confidence: 99%

The development of novel interchangeable pistons for pressure performance optimization in a gas-operated dead weight pressure balance

Mohamed¹,

Petzing²

2009

Metrologia

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The uncertainty of diameter calibrations with the comparator for diameter and form

Cited by 11 publications

References 4 publications

An interferometric Abbe-type comparator for the calibration of internal and external diameter standards

An interferometric Abbe-type comparator for the calibration of internal and external diameter standards

Measurement of Wire Diameter by Optical Diffraction

The development of novel interchangeable pistons for pressure performance optimization in a gas-operated dead weight pressure balance

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