Acoustic method and apparatus for measuring thickness of a coati

Details Acoustic method and apparatus for measuring thickness of a coati Acoustic method and apparatus for measuring thickness of a coati

1984-01-03

1985-09-10

Ciarlante, Anthony V.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

73622, 73638, G01N 2900

Patent

active

045398470

ABSTRACT:
A method or system for measuring thickness of a coating layer on a substrate. It employs acoustic energy and involves transmitting a sweep of frequencies covering a predetermined range through the substrate and its coating. The energies reflected back by the substrate and coating are determined as a function of the frequencies in said range, and the transmission pattern provides a basis for determining the coating thickness.

REFERENCES:
patent: 3577981 (1971-05-01), Kuris
patent: 3872443 (1975-03-01), Ott
patent: 4128011 (1978-12-01), Savage

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