Resonant frequency method for bearing ball inspection

Details Resonant frequency method for bearing ball inspection Resonant frequency method for bearing ball inspection

1992-01-22

1993-11-02

Williams, Hezron E.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

73593, 73643, 73657, 73659, G01H 1300

Patent

active

052575446

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.

REFERENCES:
patent: 4255971 (1981-03-01), Rosencwaig
patent: 4567769 (1986-02-01), Barkhoudarian
patent: 4928527 (1990-05-01), Burger et al.
patent: 4995259 (1991-02-01), Khuri-Yakub et al.
patent: 5005417 (1991-04-01), Kawasaki et al.
patent: 5062296 (1991-11-01), Migliori

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