Accession Number : ADD018442

Title :   Strain Sensing System Including a Magnetostrictive Material Having a Piezomagnetic Property Selected for Maximizing Electrical Impedance to Current Applied to a Predetermined Skin Depth.

Descriptive Note : Patent, Filed 16 Jun 95, patented 4 Feb 97,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Hathaway, Kristl B ; Restorff, James B ; Wun-Fogle, Marilyn ; Clark, Arthur E

Report Date : 04 Feb 1997

Pagination or Media Count : 5

Abstract : A magnetostrictive element having a large magnetomechanical coupling factor along its axis, is selected to determine strain by measurement of changes in its electrical impedance along such axis Such measurement is maximized by generation of current of a predetermined frequency conducted through the magnetostrictive element to correspondingly penetrate the magnetostrictive element to a substantial skin depth.

Descriptors :   *STRAIN GAGES, *PATENTS, *MAGNETOSTRICTIVE ELEMENTS, MAGNETIC FIELDS, STRAIN(MECHANICS), PIEZOELECTRIC MATERIALS, ELECTRICAL IMPEDANCE, SKIN(STRUCTURAL), FERROMAGNETIC MATERIALS, MAGNETOSTRICTION

Subject Categories : Electrical and Electronic Equipment
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE