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Displaying 53676 - 53700 of 73898

A Unique Sensor Fusion System for Coordinate Measuring Machine Tasks

October 1, 1997
Author(s)
M Nashman, Billibon H. Yoshimi, Tsai H. Hong, William G. Rippey, Martin Herman
This paper describes a real-time hierarchical system that combines (fuses) data from vision and touch sensors to simplify and improve the operation of a coordinate measuring machine (CMM) used for dimensional inspection tasks. Our emphasis is on sensory

Accuracy of Resonant Ultrasound Spectroscopy: An Experimental Study

October 1, 1997
Author(s)
M C. Renken, Sudook A. Kim, K W. Hollman, C M. Fortunko
We use Resonant Ultrasound Spectroscopy (RUS) to routinely determine elasticstifftness coefficents. To establish the uncertaintly of RUS, we determined the longitudinal wave velocity in a cylinder (25.6 mm x 25.4 mm diam.) of fused silica using three

An Ultrasonic Measurement of Magnetostriction

October 1, 1997
Author(s)
B Igarashi, G A. Alers, P T. Purtscher
The amplitudes of shear horizontal plate waves generated by EMATs (electromagnetic acoustic transducers) are measured to obtain estimated of the magnetostriction of a steel specimen. The wave amplitude is linked to magnetrostriction through an existing

ATP Motor Vehicle Manufacturing Technology [MVMT] Public Workshop

October 1, 1997
Author(s)
J C. Boudreaux, T R. Lettieri
The ATP Motor Vehicle Manufacturing Technology [MVMT] program focuses on technology advances that strengthen manufacturing capabilities along the entire automotive production chain. Extensive, and continuing, contacts with industry have made it clear that

Chapter 6: Virtual Environments for Design and Manufacture

October 1, 1997
Author(s)
Kevin W. Lyons, Scott Angster, Sankar Jayaram
The technology of computer-aided design and computer aided manufacturing (CAD/CAM) has progressed significantly from the two-dimensional wireframe drafting systems of the 1970''s to the parametric and feature-based solid modelers of the 1990''s. There are

Cumulative Seismic Damage of Reinforced Concrete Bridge Piers

October 1, 1997
Author(s)
S K. Kunnath, A El-Bahy, A W. Taylor, William C. Stone
A comprehensive experimental study was undertaken in this research effort to investigate cumulative damage in reinforced concrete circular bridge piers. Twelve identical quarter-scale bridge columns, designed and fabricated in accordance with current

Display Forum '97

October 1, 1997
Author(s)
John W. Roberts
The proceedings of the Display Forum '97 Workshop was held at the Gaithersburg, MD, Hilton on October 20, 1997. The Workshop was jointly hosted by the Video Electronics Standards Association (VESA) and the Information Technology Laboratory (ITL), NIST. The

Display Reflection Characterization

October 1, 1997
Author(s)
George R. Jones Jr.
Reflected luminance from a display surface is usually characterized as being diffuse (lambertian) and specular. Is this accurate? Does the focus length and aperture of the measuring lens have an effect on the measured reflected luminance?

Electromagnetic Signal Attenuation in Construction Materials

October 1, 1997
Author(s)
William C. Stone
Laboratory studies of electromagnetic (EM) signal propagation through construction materials were carried out as part of the NIST initiative in Non-Line-of-Sight surveying technology. From these data it is possible to determine several important material

Integrated Vision and Touch Sensing for CMMs

October 1, 1997
Author(s)
Billibon H. Yoshimi, Tsai Hong Hong, Martin Herman, M Nashman, William G. Rippey
This paper describes a calibrated and an uncalibrated method for integrating a vision system with touch sensors and a Coordinate Measuring Machine (CMM). Traditionally, vision systems are used to measure machined parts and to localize manufacturing defects

Make Me a Match

October 1, 1997
Author(s)
Isabel M. Beichl, F Sullivan
This is a tutorial article on the Hopcroft-Karp algorithm for finding a maximal matching in an undirected graph.
Displaying 53676 - 53700 of 73898
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