A magnetostrictive sensor interrogated by fiber gratings for DC-current and temperature discrimination

Author

Mora, J. ; Díez, A. ; Cruz, J.L. ; Andrés, M.V.

Author_Institution

Dept. de Fisica Aplicada, Valencia Univ., Spain

Volume

12

Issue

12

fYear

2000

Firstpage

1680

Lastpage

1682

Abstract

A magnetostrictive sensor head with temperature compensation has been developed for measurement of static magnetic fields. The device consists on two different alloys with similar thermal expansion coefficient one of which has a giant magnetostriction, the expansion of both materials produced by heat and magnetism is detected by two fiber gratings. One of the gratings measures the temperature of the sensor and the difference between the wavelengths reflected by the gratings is a measurement of the magnetically induced strain.

Keywords

diffraction gratings; electric current measurement; fibre optic sensors; magnetic field measurement; magnetic sensors; magnetostrictive devices; temperature measurement; thermal expansion; DC-current discrimination; alloys; fiber gratings; giant magnetostriction; magnetically induced strain; magnetostrictive sensor; magnetostrictive sensor head; static magnetic fields; temperature compensation; temperature discrimination; thermal expansion coefficient; Fiber gratings; Magnetic field measurement; Magnetic materials; Magnetic sensors; Magnetostriction; Optical fiber devices; Optical fiber sensors; Strain measurement; Temperature measurement; Temperature sensors;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.896347

Filename

896347