Measuring and testing – Tire – tread or roadway – Tire inflation testing installation
Patent
1979-04-19
1981-06-30
Ciarlante, Anthony V.
Measuring and testing
Tire, tread or roadway
Tire inflation testing installation
73600, 73618, G01N 2904
Patent
active
042755891
ABSTRACT:
A pulsed through-transmission ultrasonic non-destructive inspection of the internal structure in a tire wall is effected. The transmitted acoustic signals preferably have a frequency of least 40 Khz, are transduced to electrical form, amplified with a relatively long time constant AGC, rectified and integrated during only the initial or leading edge portions of each pulse or burst. The resulting integrated analog signal values thus provided have relative magnitudes which may be displayed or otherwise processed to detect structural anomalies within the tire wall. If plural acoustic transmitters are utilized, they are preferably multiplexed such that only a single transducer is activated at a given time.
The ultrasonic inspection is preferably carried out through the walls of a rotating inflated tire with the ultrasonic transducers being automatically moved toward the inner and outer tire wall surfaces to optimum relative distances of separation during an inspection cycle. The transducers disposed inside the inflated tire are preferably mounted for automatic retraction into a protected space during tire mounting and demounting operations. Such ultrasonic inspection techniques may be combined with conventional tire buffing methods and apparatus as practiced in tire retreading operations.
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Proceedings of the 1973 Symposium on Nondestructive Testing of Tires by Paul E. J. Vogel dated 10-12 Apr. 1973, published by the DOD (NTIAC), Army Materials and Mechanics Research Center, Watertown, Mass.-pp. 47, 49-68.
Proceedings of the Second Symposium on Nondestructive Testing of Tires by Paul E. J. Vogel dated 1-3 Oct. 1974, published by the DOD (NTIAC), Army Materials and Mechanics Research Center, Watertown, Mass.-pp. 39-55, 143-145, 147-153, 155-158, 159-163.
Proceedings of the Third Symposium on Nondestructive Testing of Tires by Paul E. J. Vogel, dated 27-29 Jan. 1976, published by the Army Materials and Mechanics Research Center, Watertown, Mass.-pp. 1, 3, 5, 6-7, 45-59, 90-96, 109, 110.
Dugger Doyle L.
Ho Morris D.
Bandag Incorporated
Ciarlante Anthony V.
Nixon Larry S.
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