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Displaying records 41 to 50 of 62 records.
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41. A General Quantitative Method to Validate Instrument Calibration Techniques
Published: 11/1/1999
Author: Steven David Phillips
Abstract: In this paper a method to validate proposed calibration procedures for coordinate measuring machines (CMMs) is presented. Conceptually, the validation procedure is based on a computer generated population of CMMs assumed to include any real CMM that ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820940

42. Improving Kinematic Touch Trigger Probe Performance
Published: 4/1/1999
Authors: Steven David Phillips, William Tyler Estler
Abstract: Kinematic touch trigger probes are widely used on CMMs. This article gives CMM users advice on how to minimize the systematic errors associated with this class of probes.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820943

43. A Constrained Monte Carlo Simulation Method for the Calculation of CMM Measurement Uncertainty
Published: 1/1/1999
Authors: Steven David Phillips, Bruce R. Borchardt, Daniel S Sawyer, William Tyler Estler, K Eberhardt, M Levenson, Marjorie A McClain, Ted Hopp
Abstract: We describe a Monte Carlo simulation technique where known information about a metrology system is employed as a constraint to distinguish the errors associated with the instrument under consideration from the set of all possible instrument errors. T ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820941

44. Measurement Uncertainty and Uncorrected Bias
Published: 1/1/1999
Authors: Steven David Phillips, K Eberhardt, William Tyler Estler
Abstract: This paper discusses the distinction between measurement uncertainty, measurement errors and their role in the calibration process. The issue of including uncorrected bias is addressed and a method to extend the current ISO Guide to the Expression of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820942

45. Calculation of Measurement Uncertainty Using Prior Information
Published: 11/1/1998
Authors: Steven David Phillips, William Tyler Estler
Abstract: We describe the use of Bayesian inference to include prior information about the value of the measurand in the calculation of measurement uncertainty. Typical examples show this can, in effect, reduce the expanded uncertainty by up to 85 %. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820904

46. The Estimation of Measurement Uncertainty of Small Circular Features Measured by Coordinate Measuring Machines
Published: 4/1/1998
Authors: Steven David Phillips, Bruce R. Borchardt, William Tyler Estler, J Buttress
Abstract: This paper examines the measurement uncertainty of small circular features as a function of the sampling strategy; i.e., the number and distribution of measurement points. Specifically, we examine measuring a circular feature using a three-point samp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820903

47. Guidelines for Expressing the Uncertainty of Measurement Results Containing Uncorrected Bias
Published: 9/1/1997
Authors: Steven David Phillips, K Eberhardt, B Parry
Abstract: This paper proposes a method to extend the current ISO Guide to the Expression of Uncertainty in Measurement to include the case of known, but uncorrected, measurement bias. It is strongly recommended that measurement results be corrected for bias, h ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820858

48. Practical Aspects of Touch Trigger Probe Error Compensation
Published: 7/1/1997
Authors: William Tyler Estler, Steven David Phillips, Bruce R. Borchardt, Ted Hopp, M Levenson, K Eberhardt, Marjorie A McClain
Abstract: We present extensions of our prior work in modeling and correcting for pretravel variation errors in kinematic seat touch-trigger coordinate measuring machine (CMM) probes with straight styli. A simple correction term is shown to account for a range ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820843

49. Discussion of Statistical Issues in Geometric Feature Inspection Using Coordinate Measuring Machines
Published: 2/1/1997
Authors: Steven David Phillips, K Eberhardt
Abstract: A coordinate measuring machine (CMM) is a computer controlled device that uses a probe to obtain measurements on a manufactured part''s surface, usually one point at a time. Probe movements may be programmed or determined manually by operatio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820802

50. Results of the NIST National Ball Plate Round Robin
Published: 1/1/1997
Authors: Gregory W Caskey, Steven David Phillips, Bruce R. Borchardt
Abstract: This report examines the results of the ball plate round robin administered by NIST. The round robin was part of an effort to assess the current state of industry practices for measurements made using coordinate measuring machines. Measurements of a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820994



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