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You searched on: Author: Balasubramanian Muralikrishnan

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1. Laser Trackers for Large Scale Dimensional Metrology: A Review
Published: 3/25/2016
Authors: Balasubramanian Muralikrishnan, Steven David Phillips, Daniel S Sawyer
Abstract: Thirty years since their invention, laser trackers are now recognized as the measurement tool of choice in the manufacture and assembly of large components. While their general design, i.e., a ranging unit on a two-axis gimbal, has not changed signif ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=918617

2. Performance evaluation of a laser tracker hand held touch probe
Published: 11/5/2015
Authors: Balasubramanian Muralikrishnan, Christopher J Blackburn, Prem Kumar Rachakonda, Daniel S Sawyer
Abstract: Hand-held touch probes and laser scanners are increasing the scope and applicability of laser trackers. While methods to evaluate the performance of laser trackers in conjunction with spherically-mounted retro-reflectors (SMRs) are well established, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=919213

3. EVALUATION OF THE RANGE PERFORMANCE OF LASER SCANNERS USING NON-PLANAR TARGETS
Published: 11/1/2015
Authors: Prem Kumar Rachakonda, Balasubramanian Muralikrishnan, Craig M Shakarji, Vincent D Lee, Daniel S Sawyer
Abstract: The Dimensional Metrology Group (DMG) at the National Institute of Standards and Technology (NIST) is supporting the development of documentary standards for performance evaluation of Laser scanners. This evaluation could be performed by determinin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=919240

4. Towards the Development of a Documentary Standard for Derived-Point to Derived-Point Distance Performance Evaluation of Spherical Coordinate 3D Imaging Systems
Published: 10/30/2015
Authors: Balasubramanian Muralikrishnan, Katharine M Shilling, Prem Kumar Rachakonda, Wei Ren, Vincent D Lee, Daniel S Sawyer
Abstract: This paper describes ongoing research work within the Dimensional Metrology Group (DMG) at the National Institute of Standards and Technology (NIST) in support of the development of a documentary standard for derived-point to derived-point distance p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917419

5. Techniques to Evaluate Laser Scanners for Advanced Manufacturing Applications
Published: 7/23/2015
Authors: Prem Kumar Rachakonda, Balasubramanian Muralikrishnan, Katharine M Shilling, Daniel S Sawyer, Geraldine S Cheok, Kamel S Saidi
Abstract: Laser scanners have become indispensable tools for fast and accurate 3D image acquisition applications such as part inspection, reverse engineering, cultural heritage digitization, surveying, automotive robotic navigation etc. The Dimensional Met ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=919239

6. Volumetric Performance Evaluation of a Laser Scanner Based on Geometric Error Model
Published: 1/5/2015
Authors: Balasubramanian Muralikrishnan, Massimiliano M. Ferrucci, Daniel S Sawyer, Grant Gerner, Vincent D Lee, Christopher J Blackburn, Steven David Phillips, Yuri Yakovlev, Andrey Astrelin, Spike Milligan, John Palmateer
Abstract: We discuss a geometric error model for those large volume laser scanners that have the laser source and a spinning prism mirror mounted on a platform that can rotate about the vertical axis. We describe the terms that constitute the model, address th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916328

7. In-situ Temperature Calibration Capability for Dimensional Metrology
Published: 12/15/2014
Authors: Prem Kumar Rachakonda, Daniel S Sawyer, Balasubramanian Muralikrishnan, Christopher J Blackburn, Craig M Shakarji, Gregory F Strouse, Steven David Phillips
Abstract: The Dimensional Metrology Group (DMG) at the National Institute of Standards and Technology (NIST) has developed a new in-situ temperature calibration system. This paper discusses the system components, an in-situ calibration procedure, the uncer ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=919577

8. In-situ Temperature Calibration Capability for Dimensional Metrology
Published: 12/1/2014
Authors: Prem Kumar Rachakonda, Daniel S Sawyer, Balasubramanian Muralikrishnan, Christopher J Blackburn, Craig M Shakarji, Gregory F Strouse, Steven David Phillips
Abstract: The Dimensional Metrology Group (DMG) at the National Institute of Standards and Technology (NIST) has the capability to perform large range dimensional measurements in a facility, called the Tape Tunnel. The Tape Tunnel is equipped with a 60 m l ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915733

9. A Method of Determining Sphere Center to Center Distance Using Laser Trackers For Evaluating Laser Scanners.
Published: 11/11/2014
Authors: Prem Kumar Rachakonda, Balasubramanian Muralikrishnan, Vincent D Lee, Daniel S Sawyer, Steven David Phillips, John Palmateer
Abstract: The Dimensional Metrology Group (DMG) at the National Institute of Standards and Technology (NIST) is involved in the development of documentary standards for volumetric performance evaluation of laser scanners. Typical evaluation of these scanne ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916458

10. Laser scanner two-face errors on spherical targets
Published: 11/11/2014
Authors: Balasubramanian Muralikrishnan, Katharine M Shilling, Daniel S Sawyer, Prem Kumar Rachakonda, Vincent D Lee, Steven David Phillips, Geraldine S Cheok, Kamel S Saidi
Abstract: Geometric misalignments within the construction of a laser scanner such as offsets, tilts, and eccentricities, result in systematic errors in the measured point coordinates (range and angles). Many of these sources of error are sensitive to two-face ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916435



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