Method for dynamic interference pattern testing
AssigneeThe Goodyear Tire & Rubber Company
InventorsWilliam Frank Dunn, John Michael Maloney, Michael Lynn Hooper, Wayne David Maas
Life of this patent
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Abstract
When the pressure on a reinforced rubber object is varied, weaker portions of the object expand more than surrounding areas of the object. By (a) illuminating the object with single phase monochromatic light which is separated into more than one beam, (b) causing the object to distort by abrasion or expansion, (c) observing the interference patterns on the object as it distorts and (d) analyzing stress patterns revealed by the interference patterns, these physical changes can be detected, recorded and analyzed.
Claims14
A method of detecting anomalies in a distortable object comprising the steps of:
- (a) illuminating said object with single phase monochromatic light which is separated into at least two different beams
- (b) causing said object to distort by percussion, abrasion or expansion
- (c) observing the interference patterns created by reconstruction of the light beams on the object dynamically as the object distorts and
- (d) analyzing stress patterns revealed by the interference patterns.
A method of detecting anomalies in a tire comprising the steps of:
- (a) mounting a tire on a wheel or split rim
- (b) inflating said tire
- (c) illuminating said tire with single phase monochromatic light
- (d) applying a stress that causes distortion of said tire
- (e) observing the change in light interference patterns developed on the tire dynamically as the tire is distorted.
Dependencies are inferred from the claim text.