Accession Number : ADD012061

Title :   An Apparatus for and a Method of Measuring Magnetic Effects Due to Eddy Currents.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Tarr,Paul B

Report Date : 24 Jun 1985

Pagination or Media Count : 21

Abstract : An eddy current effects measurement apparatus employs, inter alia, a reference sensor located so that it measures an applied field and any environmental fields but does not measure eddy current effects. Then an estimate(s) of the applied field at the locus of a plurality of measurement sensors is constructed and stored. Next, a conductive object or material to be measured is placed in the applied field in the vicinity of the plurality of measurement sensors away from the reference sensor and measurements are made of the applied field, any environmental fields and any fields due to the effects of eddy currents induced into the conductive object or material. Finally, the aforementioned stored estimate(s) are used to compensate the applied field at the locus of the plurality of measurement sensors so that the eddy current effects due to the placement of the conductive object or material can be observed on a keyboard/display or printed via a printer/plotter.

Descriptors :   *PATENT APPLICATIONS, *DETECTORS, *EDDY CURRENTS, *MEASUREMENT, CONDUCTIVITY, ENVIRONMENTS, LOCUS, KEYBOARDS, MAGNETIC PROPERTIES, PLOTTERS, PRINTING EQUIPMENT

Subject Categories : Test Facilities, Equipment and Methods
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE