Method for measurement of velocity of surface acoustic wave

Details Method for measurement of velocity of surface acoustic wave Method for measurement of velocity of surface acoustic wave

1983-09-06

1985-06-25

Levy, Stewart J.

Measuring and testing

Vibration

By mechanical waves

73606, G01N 2900

Patent

active

045246211

ABSTRACT:
The velocity of the surface acoustic wave of a test piece is determined by projecting an acoustic wave in the form of pulses through an acoustic lens onto the test piece thereby allowing the acoustic wave to form a focal point within the test piece, causing the projected acoustic wave to be separated into a component returned in consequence of specular reflection on the surface of the test piece, a component returned after having been propagated in the form of a leaky surface acoustic wave along the surface of the test piece, and a component returned in consequence of inner reflection on the boundary of the acoustic lens, measuring the intervals separating the times at which these three components are received at a common wave receiver, and calculating the velocity based on the time intervals thus found.

REFERENCES:
patent: 4459852 (1984-07-01), Chubachi et al.
patent: 4462256 (1984-07-01), Moffett
R. D. Weglein, "A Model for Predicting Acoustic Material Signatures", Applied Physics Letters, vol. 34, No. 3, Feb. 1, 1979, pp. 179-181.

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