Sphericity determination using resonant ultrasound spectroscopy
Abstract
A method is provided for grading production quantities of spherical objects, such as roller balls for bearings. A resonant ultrasound spectrum (RUS) is generated for each spherical object and a set of degenerate sphereresonance frequencies is identified. From the degenerate sphereresonance frequencies and known relationships between degenerate sphereresonance frequencies and Poisson's ratio, a Poisson's ratio can be determined, along with a "best" spherical diameter, to form spherical parameters for the sphere. From the RUS, finestructure resonant frequency spectra are identified for each degenerate sphereresonance frequency previously selected. From each finestructure spectrum and associated sphere parameter values an asphericity value is determined. The asphericity value can then be compared with predetermined values to provide a measure for accepting or rejecting the sphere.
 Inventors:

 Los Alamos, NM
 Santa Fe, NM
 Issue Date:
 Research Org.:
 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 OSTI Identifier:
 869554
 Patent Number(s):
 5355731
 Assignee:
 Regents of University of California, Office of Technology (Alameda, CA)
 Patent Classifications (CPCs):

G  PHYSICS G01  MEASURING G01H  MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
 DOE Contract Number:
 W7405ENG36
 Resource Type:
 Patent
 Country of Publication:
 United States
 Language:
 English
 Subject:
 sphericity; determination; resonant; ultrasound; spectroscopy; method; provided; grading; production; quantities; spherical; roller; balls; bearings; spectrum; rus; generated; set; degenerate; sphereresonance; frequencies; identified; relationships; poisson; ratio; determined; diameter; form; parameters; sphere; finestructure; frequency; spectra; previously; selected; associated; parameter; values; asphericity; value; compared; predetermined; provide; measure; accepting; rejecting; resonant ultrasound; resonant frequency; predetermined value; resonance frequency; predetermined values; parameter values; ultrasound spectroscopy; spherical diameter; determined values; frequency spectra; /73/
Citation Formats
Dixon, Raymond D, Migliori, Albert, and Visscher, William M. Sphericity determination using resonant ultrasound spectroscopy. United States: N. p., 1994.
Web.
Dixon, Raymond D, Migliori, Albert, & Visscher, William M. Sphericity determination using resonant ultrasound spectroscopy. United States.
Dixon, Raymond D, Migliori, Albert, and Visscher, William M. Sat .
"Sphericity determination using resonant ultrasound spectroscopy". United States. https://www.osti.gov/servlets/purl/869554.
@article{osti_869554,
title = {Sphericity determination using resonant ultrasound spectroscopy},
author = {Dixon, Raymond D and Migliori, Albert and Visscher, William M},
abstractNote = {A method is provided for grading production quantities of spherical objects, such as roller balls for bearings. A resonant ultrasound spectrum (RUS) is generated for each spherical object and a set of degenerate sphereresonance frequencies is identified. From the degenerate sphereresonance frequencies and known relationships between degenerate sphereresonance frequencies and Poisson's ratio, a Poisson's ratio can be determined, along with a "best" spherical diameter, to form spherical parameters for the sphere. From the RUS, finestructure resonant frequency spectra are identified for each degenerate sphereresonance frequency previously selected. From each finestructure spectrum and associated sphere parameter values an asphericity value is determined. The asphericity value can then be compared with predetermined values to provide a measure for accepting or rejecting the sphere.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}