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Title: Resonant frequency method for bearing ball inspection

Abstract

The present invention provides for an inspection system and method for detecting defects in test objects which includes means for generating expansion inducing energy focused upon the test object at a first location, such expansion being allowed to contract, thereby causing pressure wave within and on the surface of the test object. Such expansion inducing energy may be provided by, for example, a laser beam or ultrasonic energy. At a second location, the amplitudes and phases of the acoustic waves are detected and the resonant frequencies' quality factors are calculated and compared to predetermined quality factor data, such comparison providing information of whether the test object contains a defect. The inspection system and method also includes means for mounting the bearing ball for inspection. 5 figures.

Inventors:
;
Issue Date:
OSTI Identifier:
5277218
Patent Number(s):
5257544
Application Number:
PPN: US 7-824001
Assignee:
Leland Stanford Junior Univ., Stanford, CA (United States)
DOE Contract Number:  
FG03-84ER45157
Resource Type:
Patent
Resource Relation:
Patent File Date: 22 Jan 1992
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; BALL BEARINGS; INSPECTION; EQUIPMENT; LASER RADIATION; NONDESTRUCTIVE TESTING; ULTRASONIC WAVES; BEARINGS; ELECTROMAGNETIC RADIATION; MATERIALS TESTING; RADIATIONS; SOUND WAVES; TESTING; 420500* - Engineering- Materials Testing

Citation Formats

Khuri-Yakub, B T, and Chungkao, Hsieh. Resonant frequency method for bearing ball inspection. United States: N. p., 1993. Web.
Khuri-Yakub, B T, & Chungkao, Hsieh. Resonant frequency method for bearing ball inspection. United States.
Khuri-Yakub, B T, and Chungkao, Hsieh. Tue . "Resonant frequency method for bearing ball inspection". United States.
@article{osti_5277218,
title = {Resonant frequency method for bearing ball inspection},
author = {Khuri-Yakub, B T and Chungkao, Hsieh},
abstractNote = {The present invention provides for an inspection system and method for detecting defects in test objects which includes means for generating expansion inducing energy focused upon the test object at a first location, such expansion being allowed to contract, thereby causing pressure wave within and on the surface of the test object. Such expansion inducing energy may be provided by, for example, a laser beam or ultrasonic energy. At a second location, the amplitudes and phases of the acoustic waves are detected and the resonant frequencies' quality factors are calculated and compared to predetermined quality factor data, such comparison providing information of whether the test object contains a defect. The inspection system and method also includes means for mounting the bearing ball for inspection. 5 figures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {11}
}