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 sphere-resonance frequencies is identified. From the degenerate sphere-resonance frequencies and known relationships between degenerate sphere-resonance 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, fine-structure resonant frequency spectra are identified for each degenerate sphere-resonance frequency previously selected. From each fine-structure 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 Laboratory (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:
- W-7405-ENG-36
- 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; sphere-resonance; frequencies; identified; relationships; poisson; ratio; determined; diameter; form; parameters; sphere; fine-structure; 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 sphere-resonance frequencies is identified. From the degenerate sphere-resonance frequencies and known relationships between degenerate sphere-resonance 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, fine-structure resonant frequency spectra are identified for each degenerate sphere-resonance frequency previously selected. From each fine-structure 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 = {Sat Jan 01 00:00:00 EST 1994},
month = {Sat Jan 01 00:00:00 EST 1994}
}
Works referenced in this record:
On the normal modes of free vibration of inhomogeneous and anisotropic elastic objects
journal, October 1991
- Visscher, William M.; Migliori, Albert; Bell, Thomas M.
- The Journal of the Acoustical Society of America, Vol. 90, Issue 4