Publications

Displaying 1 - 14 of 14

Physical Models and Dimensional Traceability of WR15 Rectangular Waveguide Standards for Determining Systematic Uncertainties of Calibrated Scattering-Parameters

August 10, 2020

Author(s)

Jeffrey A. Jargon, Dylan F. Williams, Angela C. Stelson, Christian J. Long, Aaron M. Hagerstrom, Paul D. Hale, John R. Stoup, Eric S. Stanfield, Wei Ren

In this report, we document the models and dimensional traceability of our WR15 rectangular waveguide standards for performing multiline thru-reflect-line

X-ray computed tomography instrument performance evaluation, Part II: Sensitivity to rotation stage errors

July 11, 2019

Author(s)

Balasubramanian Muralikrishnan, Katharine M. Shilling, Steven D. Phillips, Wei Ren, Vincent D. Lee, Felix H. Kim

The development of standards for evaluating the performance of X-ray computed tomography instruments is ongoing within ASME and ISO working committees. A key

X-ray computed tomography instrument performance evaluation, Part I: Sensitivity to detector geometry errors

July 11, 2019

Author(s)

Balasubramanian Muralikrishnan, Katharine M. Shilling, Steven D. Phillips, Wei Ren, Vincent D. Lee, Felix H. Kim

X-ray computed tomography (XCT), long used in medical imaging and defect inspection, is now increasingly used for dimensional measurements of geometrical

X-ray computed tomography instrument performance evaluation: Detecting geometry errors using a calibrated artifact

April 30, 2019

Author(s)

Balasubramanian Muralikrishnan, Katharine M. Shilling, Steven D. Phillips, Wei Ren, Vincent D. Lee, Felix H. Kim, Gabriel Alberts, Valentina Aloisi

X-ray computed tomography (XCT) is uniquely suitable for non-destructive dimensional metrology of delicate or internal features generated from the additive

A radial calibration window for analytical ultracentrifugation

July 20, 2018

Author(s)

Thomas W. LeBrun, Peter Schuck, Wei Ren, Justine Yoon, Xianghui Dong, Nicole Y. Morgan, Jeffrey A. Fagan, Huaying Zhao

Analytical ultracentrifugation (AUC) is a first-principles based method for studying particles in solution by monitoring the evolution of their radial

Characterization of the Dimensions of Internal Gap in a Glass Artifact Using a Laser Triangulation Probe

August 12, 2017

Author(s)

Wei Ren, Theodore D. Doiron, John R. Stoup, Eric S. Stanfield

High-accuracy Coordinate Measuring Machine (CMM) is always a good option to measure the dimensions on a variety of artifacts. However, due to the large length

On The Feasibility of Performing Line Scale Measurements on a High Accuracy Coordinate Measuring Machine

July 26, 2016

Author(s)

Wei Ren, Roy E. Sundahl, Theodore D. Doiron

This paper describes recent work in transitioning line scale measurements from an old LSI machine to a vision probe equipped Moore-M48 Coordinate Measuring

Towards the Development of a Documentary Standard for Derived-Point to Derived-Point Distance Performance Evaluation of Spherical Coordinate 3D Imaging Systems

October 30, 2015

Author(s)

Balasubramanian Muralikrishnan, Katharine M. Shilling, Prem K. Rachakonda, Wei Ren, Vincent D. Lee, Daniel S. Sawyer

This paper describes ongoing research work within the Dimensional Metrology Group (DMG) at the National Institute of Standards and Technology (NIST) in support

Applications of Profile Filtering in the Dimensional Metrology of Fuel Cell Plates

May 14, 2013

Author(s)

Balasubramanian Muralikrishnan, Wei Ren, Eric S. Stanfield, Dennis S. Everett, Xiaoyu A. Zheng, Theodore D. Doiron

We describe the application of several surface profile filters as an enabling tool in the dimensional measurements of an engineering artifact, namely, a fuel

High Accuracy Measurements Using a Scanning System with a Single Point Triangulation Sensor

May 13, 2013

Author(s)

Theodore D. Doiron, Wei Ren, Eric S. Stanfield, Balasubramanian Muralikrishnan, Christopher J. Blackburn

The capabilities of non-contact laser spot triangulation sensors for high accuracy measurements have slowly increased over the past decade, and now have usable

Assessing Ranging Errors as a Function of Azimuth in Laser Trackers and Tracers

April 18, 2013

Author(s)

Balasubramanian Muralikrishnan, Vincent D. Lee, Christopher J. Blackburn, Daniel S. Sawyer, Steven D. Phillips, Wei Ren, Ben Hughes

Tilt and radial error motion of a laser tracker head as it spins about the two axes results in small but measurable ranging and angle errors. The laser tracer

Performance Evaluation Experiments on a Laser Spot Triangulation Probe

November 25, 2011

Author(s)

Balasubramanian Muralikrishnan, Wei Ren, Dennis S. Everett, Eric S. Stanfield, Theodore D. Doiron

Laser triangulation probes are increasingly used for dimensional measurements in a variety of applications. At the National Institute of Standards and

NON-CONTACT DIMENSIONAL MEASUREMENTS OF BIPOLAR FUEL CELL PLATES

November 15, 2011

Author(s)

Balasubramanian Muralikrishnan, Wei Ren, Dennis S. Everett, Eric S. Stanfield, Theodore D. Doiron

Non-contact dimensional measurement of fuel cell plates is critical to the eventual rapid manufacture by supporting in-process measurement and control. This

Dimensional Metrology of Bipolar Fuel Cell Plates Using Laser Spot Triangulation Probes

March 22, 2011

Author(s)

Balasubramanian Muralikrishnan, Wei Ren, Dennis S. Everett, Eric S. Stanfield, Theodore D. Doiron

As in any engineering component, manufacturing a bipolar fuel cell plate for a polymer electrolyte membrane (PEM) hydrogen fuel cell power stack to within its

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