Ultrasonic apparatus and method for measuring wall thickness

Details Ultrasonic apparatus and method for measuring wall thickness Ultrasonic apparatus and method for measuring wall thickness

1980-01-10

1981-12-15

Ciarlante, Anthony V.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

73602, G01N 2900

Patent

active

043052940

ABSTRACT:
Disclosed is a method for determining the thickness of an object, including the steps of generating a higher order mode ultrasonic wave at a first location on the object, varying the frequency of the generated wave, and measuring, at a second location on the object, the minimum frequency at which the generated wave will propagate in the object. Where the ultrasonic wave generated is a horizontally polarized shear wave, the thickness t may be calculated from the relationship

REFERENCES:
patent: 3504532 (1970-04-01), Muenow et al.
patent: 3996791 (1976-12-01), Niklas et al.
patent: 4061017 (1977-12-01), Sloane et al.
Aldridge, Views, Reviews, Previews, (H. Egerton Ed. 1969), pp. 46-57, "Recording Ultrasonic Micrometers".

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