Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1982-10-14
1985-03-26
Willis, Davis L.
Optics: measuring and testing
By particle light scattering
With photocell detection
G01B 9025
Patent
active
045069816
ABSTRACT:
Areas (49) of improper cure in the vicinity of a bead (46, 47, 52, 53) in a pneumatic tire (11) are nondestructively detected by first generating a holographic interference pattern of the interior of the tire (11) in the region of the bead (46, 47, 52, 53). The resulting holographic interference pattern has an ordered pattern of fringe lines (60) produced by the bead (46, 47, 52, 53). A determination is made if there exists a band (64) of fringe lines (60) at the edge of and separated from the ordered pattern of fringe lines (60) produced by the bead (46, 47, 52, 53), and, if so, the number of fringe lines in the band (64) are counted. If the band (64) contains three or four fringe lines the tire (11) contains areas (49) of improper cure in the vicinity of a bead (46, 47, 52, 53).
REFERENCES:
patent: 4225238 (1980-09-01), Rottenkolber
patent: 4234256 (1980-11-01), Yeager
Ralph M. Grant, Holographic Tire Testing--Comments Upon the Structural Integrity of Truck Tires as Observed by Holography, paper distributed by Industrial Holographics, Incorporated of Rochester, Mich.
Introduction and General Machine Desciption, excerpt from undated catalog of Industrial Holographics, Incorporated of Rochester, Mich.
Koren Matthew W.
The B. F. Goodrich Company
Willis Davis L.
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