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Accession Number:
AD0753503
Title:
Method for the Measurement of the Velocity of Ultrasonic Oscillations,
Corporate Author:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
Report Date:
1972-11-24
Abstract:
The invention concerns a method for the measurement of the velocity of ultrasonic oscillations by measurements of the displacement of a radiating element along the sound ray and of the full change in phase shift between a signal which has passed through an acoustic system and a reference signal. The method is distinguished by the fact that, for the purpose of achieving increased accuracy, amplitude-modulated ultrasonic waves are emitted, their passage through the medium is recorded by Toplers optical method, and the received signal is transformed by a photomultiplier into a frequency-modulated alternating current with the variable component fed to a phase comparator. The velocity of the ultrasonic oscillations is determined by the whole number of voltage periods at the comparator output and by the amount of radiator displacement.
Supplementary Note:
Edited trans. of Patent (USSR) 268 048 2p 1970, by R. J. Zeccola.
Pages:
0007
File Size:
0.00MB
