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Title: 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:
 [1];  [2];  [1]
  1. Los Alamos, NM
  2. Santa Fe, NM
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
869554
Patent Number(s):
5355731
Assignee:
Regents of University of California, Office of Technology (Alameda, CA)
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 = {1994},
month = {1}
}

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