Measuring and testing – Tire – tread or roadway – Tire inflation testing installation
Patent
1979-05-21
1981-03-24
Myracle, Jerry W.
Measuring and testing
Tire, tread or roadway
Tire inflation testing installation
356359, G01N 2202
Patent
active
042572649
ABSTRACT:
A tire quality control arrangement for nondestructive material testing of vehicle tires, aircraft tires, and the like by way of holographic interferometry. A conical mirror arranged in the path of the object beam to examine a tire positioned in concentric relation with the conical mirror; a projecting device includes an objective positioned at the observation point for providing the interference pattern of at least one "meridian" portion of the inner surface of the tire to be examined on a screen; a light intensity measuring device ascertains the brightness distribution of the interference pattern or figure along a "meridian" cutting line of the tire being examined and an extreme value detector ascertains the position of the brightness extremes of the interference pattern succeeded by a device for determining the density or distribution of extremes along the "meridian" line. The output of the device for determining the density of extremes is connected to a comparing device for comparing the extrema density values with predetermined extrema density limit values. The comparing device produces a signal corresponding to a transgression, or corresponding to an excess value, and this signal is passed to the output of the comparing device connected, in turn, to an alarm device for the provision of an alarm signal.
REFERENCES:
patent: 3644047 (1972-02-01), Brown et al.
patent: 3976380 (1976-08-01), Rottenkolber et al.
Myracle Jerry W.
Opto Produkte AG
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