Report on the May 2016 ASTM E57.02 Instrument Runoff at NIST, Part 2 �  NIST Realization of Test Procedures and Uncertainties in the Reference Lengths

Muralikrishnan, Balasubramanian; Rachakonda, Prem K.; Shilling, Katharine Meghan; Lee, Vincent D.; Blackburn, Christopher J.; Sawyer, Daniel S.; Cheok, Geraldine S.; Cournoyer, Luc

doi:10.6028/nist.ir.8153

Cited by 5 publications

(4 citation statements)

References 1 publication

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“…A detailed uncertainty budget is presented in Ref. [14], but all terms do not apply in this case because the measurement is quick and temperature variation is therefore not as much of a factor as was the case in Ref. [14].…”

Section: Using a Stable Grid Of Nestsmentioning

confidence: 99%

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Laser tracker interim testing per the ASME B89.4.19-2021 and ISO 10360-10:2021 standards

Muralikrishnan¹

2023

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The recently revised ASME B89.4.19-2021 and ISO 10360-10:2021 standards for laser trackers include a new interim test that is comprehensive and more sensitive to systematic errors than the interim tests in the previous versions of the standards, i.e., the ASME B89.4.19-2006 and ISO 10360-10:2016. This interim test can be performed by users periodically in the field to assess the health of their trackers. There are two components to this interim test - the first is designed to detect geometric errors in laser trackers while the second is designed to assess the performance of the inclination sensor. In this report, we present an overview of the interim test for geometry errors, describe four methods of realizing the test, present performance evaluation data on a laser tracker from the different methods, and compare the methods in terms of their advantages and disadvantages.

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Section: Using a Stable Grid Of Nestsmentioning

confidence: 99%

“…[14], but all terms do not apply in this case because the measurement is quick and temperature variation is therefore not as much of a factor as was the case in Ref. [14]. We then performed the interim tests using these nests.…”

Section: Using a Stable Grid Of Nestsmentioning

confidence: 99%

Laser tracker interim testing per the ASME B89.4.19-2021 and ISO 10360-10:2021 standards

Muralikrishnan¹

2023

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“…factory calibration appeared to somewhat increase the zero-error). Muralikrishnan et al [71] performed the zero error test using specialized sphere targets that centrally house a 38.1 mm (1.5 in) SMR nest, see figures 6(c) and (d). These sphere targets are available commercially (and referred to as integration spheres), and the concentricity between the outer sphere and the center of the SMR was found to be within 0.01 mm.…”

Section: Zero Errormentioning

confidence: 99%

Performance evaluation of terrestrial laser scanners—a review

Muralikrishnan¹

2021

Meas. Sci. Technol.

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Terrestrial laser scanners (TLSs) are increasingly used in several applications such as reverse engineering, digital reconstruction of historical monuments, geodesy and surveying, deformation monitoring of structures, forensic crime scene preservation, manufacturing and assembly of engineering components, and architectural, engineering, and construction applications. The tolerances required in these tasks range from few tens of millimeters (for example, in historical monument digitization) to few tens of micrometers (for example, in high precision manufacturing and assembly). With numerous TLS instrument manufacturers, each offering multiple models of TLSs with idiosyncratic specifications, it is a considerable challenge for users to compare instruments or evaluate their performance to determine if they meet specifications. As a result, considerable efforts have been made by research groups across the world to model TLS error sources and to develop specialized performance evaluation test procedures. In this paper, we review these efforts including recent work to develop documentary standards for TLS performance evaluation and discuss the role of these test procedures in establishing metrological traceability of TLS measurements.

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“…The report offers detailed analyses of the complexities surrounding material characterization, process modeling, in situ measurement, performance, and other cross‐cutting challenges for polymer‐based AM. [ 33 ] It offers a future vision for polymer‐based additive manufacturing that implements a digital thread starting from process modeling and is carried into material characterization and in situ measurement to performance of printed parts. In particular, it discussed the development of models to describe and predict the effect of additives to the AM process, listed as a long‐term (>5 years) goal.…”

Section: Introductionmentioning

confidence: 99%

Best of Both Worlds: Synergistically Derived Material Properties via Additive Manufacturing of Nanocomposites

Carrola

Asadi

Zhang

et al. 2021

Adv Funct Materials

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With an exponential rise in the popularity and availability of additive manufacturing (AM), a large focus has been directed toward research in this topic's movement, while trying to distinguish themselves from similar works by simply adding nanomaterials to their process. Though nanomaterials can add impressive properties to nanocomposites (NCs), there are expansive amounts of opportunities that are left unexplored by simply combining AM with NCs without discovering synergistic effects and novel emerging material properties that are not possible by each of these alone. Cooperative, evolving properties of NCs in AM can be investigated at the processing, morphological, and architectural levels. Each of these categories are studied as a function of the amplifying relationship between nanomaterials and AM, with each showing the systematically selected material and method to advance the material performance, explore emergent properties, as well as improve the AM process itself. Innovative, advanced materials are key to faster development cycles in disruptive technologies for bioengineering, defense, and transportation sectors. This is only possible by focusing on synergism and amplification within additive manufacturing of nanocomposites.

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Report on the May 2016 ASTM E57.02 Instrument Runoff at NIST, Part 2 � NIST Realization of Test Procedures and Uncertainties in the Reference Lengths

Cited by 5 publications

References 1 publication

Laser tracker interim testing per the ASME B89.4.19-2021 and ISO 10360-10:2021 standards

Laser tracker interim testing per the ASME B89.4.19-2021 and ISO 10360-10:2021 standards

Performance evaluation of terrestrial laser scanners—a review

Best of Both Worlds: Synergistically Derived Material Properties via Additive Manufacturing of Nanocomposites

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