Ultrasonic differential measurement

Details Ultrasonic differential measurement Ultrasonic differential measurement

1993-06-10

1995-04-25

Williams, Hezron E.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

G01H 1300

Patent

active

054088801

ABSTRACT:
A method and apparatus for ultrasonic resonance testing of an object is shown and described. Acoustic vibrations are applied to an object at a plurality of frequencies. Measurements of the object's vibrational response are made simultaneously at different locations on said object. The input frequency is stepped by using small frequency changes over a predetermined range. There is a pause interval or ring delay which permits the object to reach a steady state resonance before a measurement is taken.

REFERENCES:
patent: 3659456 (1972-05-01), Marshall
patent: 4061017 (1977-12-01), Sloane

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