Accession Number : AD0643700

Title :   AN INSTRUMENT FOR MEASURING THE THICKNESS OF THIN NONMAGNETIC AND NONMETALLIC COVERINGS ON A FERROMAGNETIC BASE,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Svistunov,I. V. ; Bondarenko,N. L.

Report Date : 09 SEP 1966

Pagination or Media Count : 6

Abstract : The object of the invention is an instrument for measuring the thickness of thin nonmagnetic and nonmetallic coverings on a ferromagnetic base, which contains a generator, measuring and compensating bridges, a resonance amplifier, a resonance cascade, two detectors, a summing block and a measuring instrument. To exclude the effect of a change in the magnetic permeability of the base upon the accuracy of the measurements, the measuring bridge with inductive transducers and balancing elements is connected to the inputs of a two-channel resonance amplifier whose first channel is tuned to the third harmonic of the generator frequency and the second channel is tuned to the basic frequency of the generator. (Author)

Descriptors :   (*MEASURING INSTRUMENTS, THICKNESS), (*COATINGS, MEASUREMENT), PATENTS, USSR, INSTRUMENTATION, FERROMAGNETIC MATERIALS

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE