Ultrasonic tire testing apparatus

Details Ultrasonic tire testing apparatus Ultrasonic tire testing apparatus

1981-03-09

1982-07-06

Gill, James J.

Measuring and testing

Vibration

By mechanical waves

G01N 2904

Patent

active

043376606

ABSTRACT:
An ultrasonic, non-destructive inspection system for detecting separations and/or holes in vehicle tires. The system employs a through transmission method at ultrasonic inspection in which the ultrasonic transmitter array and the ultrasonic receiver array are both mounted in air and in a non-contacting, non-critical relationship with the tire undergoing inspection. The inspection is performed in one revolution of the tire.
The ultrasonic transmitters are pulsed and the receivers are sampled during predetermined time intervals which are related to the transmitter/receiver/tire geometry. This eliminates the problems of talk-around and standing waves. The problem of transmitter--transmitter interference is eliminated by transmitter frequency separation and transmitter array pointing geometry. The problem wherein tread pattern fluctuations in the received signal interfere with flaw detection is eliminated by the use of a finite sampled data filter whose period is adjusted to the period of the tread pattern.

REFERENCES:
patent: 3794964 (1974-02-01), Katakura
patent: 3918025 (1975-11-01), Koshikawa et al.
patent: 4279157 (1981-07-01), Schomberg et al.

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