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Displaying records 31 to 40 of 84 records.
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31. Laser Scanning for Construction Metrology
Published: 3/1/2001
Authors: Geraldine S Cheok, William C Stone, Robert R Lipman, Christoph Johann Witzgall, Javier Bernal
Abstract: This paper summarizes work at the National Institute of Standards and Technology (NIST) in the Non-Intrusive Scanning Technologies for Construction Assessment Project. It will briefly describe the initial proof-of-concept phase of this project, the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860748

32. 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

33. NIST Construction Automation Program Report No. 4: Non-Intrusive Scanning Technology for Construction Status Determination
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6457
Published: 1/1/2000
Authors: Geraldine S Cheok, Robert R Lipman, Christoph Johann Witzgall, Javier Bernal, William C Stone
Abstract: Approximately 2 % of all construction work must be devoted to manually intensive quality control and tracking of work completion, including operations involving earthmoving and bulk materials handling. Any technology that can reduce this burden and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860236

34. NIST LADAR Performance Evaluation Workshop, 2nd Proceedings. March 15-16, 2005.
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7266
Published: 12/1/2005
Author: Geraldine S Cheok
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101053

35. NIST LADAR Performance Evaluation Workshop, 2nd Proceedings. March 15-16, 2005.
Published: 12/1/2005
Author: Geraldine S Cheok
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101242

36. Navigation Performance Evaluation for Automated Guided Vehicles
Published: 5/12/2015
Authors: Roger V Bostelman, Tsai Hong Hong, Geraldine S Cheok
Abstract: Automatic guided vehicles (AGVs), an industrial form of mobile robot, typically navigate using a central computer commanding AGV movement on predefined paths. Although, how well they follow these paths is less defined in research articles and their ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=918241

37. Non-Intrusive Scanning Technology for Construction Assessment
Published: 9/1/1999
Authors: Geraldine S Cheok, William C Stone
Abstract: Work at the National Institute of Standards and Technology on laser radar imaging of a construction site is described. The objective of the research is to make measurements required in a construction project quicker and cheaper than current practice ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860191

38. Nondestructive Testing (NDT) and Sensor Technology for Service Life Modeling of New and Existing Concrete Structures
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7974
Published: 12/18/2013
Authors: Kenneth Alan Snyder, Li Piin Sung, Geraldine S Cheok
Abstract: Nondestructive test (NDT) methods and sensor technologies are evaluated in the context of providing input parameters to service life prediction models for reinforced concrete structures. Relevant NDT methods and sensors are identified that are based ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914232

39. Object Identification Using Bar Codes Based on LADAR Intensity
Published: 9/1/2001
Authors: William C Stone, Geraldine S Cheok, K M Furlani, David E. Gilsinn
Abstract: Tests of a novel concept for tracking construction components were carried out at the National Institute of Standards and Technology. The approach makes use of laser radar and retro-reflective barcodes attached to manufactured building materials. T ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860365

40. Obstacle Detection and Avoidance from an Automated Guided Vehicle
Published: 9/18/2014
Authors: Roger V Bostelman, William P Shackleford, Geraldine S Cheok
Abstract: Current automated guided vehicle (AGV) technology typically provides material handling flow along single or dual opposing-flow lanes in manufacturing and distribution facilities. An AGV stops for most any obstacle that may be in its path which then ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915448



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