Title :
Thickness gauge for dielectric materials
Author_Institution :
Boeing Airplane Company, Seattle, Wash
Abstract :
THE instrumentation described in this paper is based upon the variation of mutual inductance between two coils when brought near a metal surface. A type of thickness gauge employing this principle was first publicized by M. L. Greenough1¿4; he stated that the signal obtained from a mutual inductance was ¿greater and more linear¿ than from self-inductance. Since then applications of the principle have been extended to the measurement of distance and vibration.
Keywords :
Coils; Companies; Dielectric measurements; Dielectrics; Inductance; Instruments; Relays;
Journal_Title :
American Institute of Electrical Engineers, Part I: Communication and Electronics, Transactions of the
DOI :
10.1109/TCE.1954.6372161
