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Author: steven phillips

Displaying records 11 to 20 of 59 records.
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11. Measuring Scale Errors in a Laser Tracker s Horizontal Angle Encoder through Simple Length Measurement and Two-face System Tests
Published: 11/1/2010
Authors: Balasubramanian Muralikrishnan, Christopher J Blackburn, Daniel S Sawyer, Steven David Phillips, Robert Bridges, Quan Ma
Abstract: We describe a method to estimate the scale errors in the horizontal angle encoder of a laser tracker in this paper. The method does not require expensive instrumentation such as a rotary stage or even a calibrated artifact. An uncalibrated but stable ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904221

12. Choosing test positions for laser tracker evaluation and future Standards development
Published: 7/15/2010
Authors: Balasubramanian Muralikrishnan, Daniel S Sawyer, Christopher J Blackburn, Steven David Phillips, Craig M Shakarji, Ed Morse, Robert Bridges
Abstract: A working group within the ISO TC 213 committee is developing a draft document [11] for evaluating the performance of laser trackers. The ASME B89.4.19 Standard [1] and the draft VDI/VDE 2617 part 10 [2] describe some useful tests that are incorporat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905959

13. Economics of Measurement Uncertainty and Tolerances
Published: 7/1/2009
Authors: Steven David Phillips, J.M. Baldwin, William Tyler Estler
Abstract: Productivity is considered by considering Cobb-Douglas production function and focusing on total factor productivity (TFP). We argue that developed economies like the United States need to develop TFP by utilizing advances in computation power and in ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902981

14. ASME B89.4.19 Performance Evaluation Tests and Geometric Misalignments in Laser Trackers
Published: 1/30/2009
Authors: Balasubramanian Muralikrishnan, Daniel S Sawyer, Christopher J Blackburn, Steven David Phillips, Bruce R. Borchardt, William Tyler Estler
Abstract: Small and unintended offsets, tilts, and eccentricity of the mechanical and optical components in laser trackers introduce systematic errors in the measured spherical coordinates (angles and range readings), and possibly in the calculated lengths of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824664

15. Dimensional measurement traceability of 3D imaging data
Published: 1/19/2009
Authors: Steven David Phillips, Craig M Shakarji, Michael Krystek, K Summerhays
Abstract: This paper discusses the concept of metrological traceability to the SI unit of length, the meter. We describe how metrological traceability is realized, give a recent example of the standardization of laser trackers, and discuss progress and challe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900252

16. Performance Evaluation of Laser Trackers
Published: 9/15/2008
Authors: Balasubramanian Muralikrishnan, Daniel S Sawyer, Christopher J Blackburn, Steven David Phillips, Bruce R. Borchardt, William Tyler Estler
Abstract: The American Society for Mechanical Engineers (ASME) recently released the ASME B89.4.19 Standard [1] on performance evaluation of spherical coordinate instruments such as laser trackers. At the National Institute of Standards and Technology (NIST), ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824702

17. Uncertainty Due to Finite Resolution Measurements
Published: 5/1/2008
Authors: Steven David Phillips, Blaza Toman, William Tyler Estler
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912361

18. Laser Tracker Testing at NIST Using the ASME B89.4.19 Standard
Published: 1/1/2007
Authors: Balasubramanian Muralikrishnan, Christopher J Blackburn, Daniel S Sawyer, Bruce R. Borchardt, William Tyler Estler, Steven David Phillips
Abstract: While the versatility and economics of laser trackers are quite appealing, the ability to assess their accuracy and to compare various brands has been limited by a lack of a national or international standard that encompasses testing and traceability ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824608

19. Laser Trackers: Testing and Standards
Published: 1/1/2007
Author: Steven David Phillips
Abstract: Laser trackers are now the tool of choice for large scale coordinate metrology.  They are transportable allowing reconfigurable production facilities at a lower capital cost than large CMMs.  Trackers now include absolute distance measuring ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824609

20. Large-Scale Metrology Instrument Performance Evaluations at NIST
Published: 1/1/2006
Authors: William Tyler Estler, Daniel S Sawyer, Bruce R. Borchardt, Steven David Phillips
Abstract: The ASME B89 Committee on Dimensional Metrology has approved a new American National Standard B89.4.19 - Performance Evaluation of Laser Based Spherical Coordinate Measurement Systems. This Standard, to be published in 2006, specifies test methods fo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824607



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