Form measurement of a 0.1 mm diameter wire with a chromatic confocal sensor, with associated uncertainty evaluation

Sanz, Claude; Giusca, Claudiu; Morantz, Paul; Marín, A. F. García; Chérif, Ahmed; Schneider, Jürgen; Mainaud-Durand, H; Shore, Paul; Steffens, Norbert

doi:10.1088/1361-6501/aac352

Cited by 8 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The wire is measured using a touchless probe and the fiducials using a traditional probe. A new touchless probe that takes into account the wire's form error was developed [30]. All measurement data are directly in the same CS, which limits uncertainty.…”

Section: Fiducializationmentioning

confidence: 99%

CLIC pre-alignment — status and remaining challenges

Kemppinen

Rude

Durand

et al. 2021

Meas. Sci. Technol.

View full text Add to dashboard Cite

The Compact Linear Collider (CLIC) is a study of a 3 TeV linear electron-positron (e + e − ) accelerator and is a successor candidate for CERN's Large Hadron Collider. The CLIC luminosity target is 5.9 × 10 34 cm −2 s −1 , which causes unprecedented pre-alignment requirements of its main linear accelerator (main linac). Along the 50 km long tunnel, the main components of any 200 m long section have to be positioned within 10 µm from a straight reference line. The pre-alignment challenge has been studied at CERN since the 1990s, and the main technical challenges have been solved. This article summarizes the positioning strategy and presents it to an audience outside the particle accelerator community. The methods can be of interest especially in the field of large-scale metrology. The positioning strategy consists of several steps or subsystems. The development of a straight reference line over tens of kilometers allows absolute positioning of accelerator components, while a process called fiducialization defines component reference axes with regard to alignment targets. Emphasis is on a support pre-alignment network that acts as a link between the straight reference line and fiducialization. The subsystems and remaining challenges in their development are presented. The chosen strategy's potential is demonstrated experimentally by building a short test setup.

show abstract

Section: Fiducializationmentioning

confidence: 99%

CLIC pre-alignment — status and remaining challenges

Kemppinen

Rude

Durand

et al. 2021

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Parameters are also listed in Table 5. If the measuring demand of the transparent media measuring, like glass and plastics, the CCS is the most suitable non-contact sensor to meet the quickly scanning demand and avoid contact between sensor and surface [21,22]. The CCS on the market contains a point sensor and line sensor.…”

Section: Standard Sphere Calibration Experimentsmentioning

confidence: 99%

Modeling and sphere constrained calibration of a vision coordinate measurement machine

Huang¹,

Yan²,

Zhang³

et al. 2021

Meas. Sci. Technol.

View full text Add to dashboard Cite

A new vision coordinate measurement machine (v-CMM) is proposed by integrating a binocular stereo vision tracking device and a 1D distance sensor to measure the surface. Using a standard sphere, the calibration process is carried out in two steps. Fewer points on the sphere are measured and the linear calibration model is used to calculate the approximated transformation. More points are collected and the radius-difference based optimization model is used to calculate the accurate transformation. Using the Monte Carlo method, the calibration uncertainty is analyzed by deriving the relationship between calibration uncertainty and tracking random errors. The effectiveness of the calibration algorithm is verified by analyzing the situation where the center error and tracking error mix. Two experiments are carried out: One is the calibration experiment, which will obtain the structure parameters of v-CMM with uncertainty. In the experiment, the measured runout error of the sphere is 0.024 mm, which is able to evaluate the accuracy of the calibration process. The other experiment is that a part with three cylindrical bars is measured. Key sizes of the part are calculated, containing bars radiuses and the distances between them. The experimental results show that after calibrating, the measuring precision of v-CMM is highly improved. The v-CMM is suitable in specific scenarios, like transparent media surface measuring.

show abstract

“…However, an alternative cost-effective and wellestablished method is to use CMM. Modern CMM's are highly accurate and capable to measure complex; small to large components [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Task‐specific measurement uncertainty budget of Curvic‐coupling using analytical methods

Gashi¹,

Toman²,

Matharu³

2019

19th International Congress of Metrology (CIM2019)

View full text Add to dashboard Cite

A number of Industrial reference components manufactured by grinding to achieve tight dimensional tolerances. In this paper, we present an uncertainty budget of a reference forty-tooth #Curvic measured using an accurate Coordinate Measuring Machine (CMM) in a temperature-controlled laboratory. A number of measurements conducted on Curvicto assess measurement repeatability and reproducibility. Expanded uncertainty budget evaluated from twenty-one Influencing factors, giving8.7 µm (7.1 µm from Type A) and 11 µm (9.6 µm from Type A), respectively, for repeatability and reproducibility test (k >2). Measurement uncertainty due to steady-state thermal effects is 2.2 µm. An adaptable model is presented to evaluate transient thermal effects, a factor often neglected in measurement uncertainty. Thermal time constant uncertainty associated with transient thermal effects is evaluated u(τ)= ±398 s, which corresponds to ±15 % of thermal time constant expanded uncertainty, u(τ)= ±2570 s. #Curvic® (Curvic is a trademark of The Gleason Works, 1000 University Avenue, Rochester, NY, 14603, USA)

show abstract

Form measurement of a 0.1 mm diameter wire with a chromatic confocal sensor, with associated uncertainty evaluation

Cited by 8 publications

References 7 publications

CLIC pre-alignment — status and remaining challenges

CLIC pre-alignment — status and remaining challenges

Modeling and sphere constrained calibration of a vision coordinate measurement machine

Task‐specific measurement uncertainty budget of Curvic‐coupling using analytical methods

Contact Info

Product

Resources

About