PROCEDURE AND APPARATUS FOR MEASURING A D.C. MAGNETIC FIELD BASED ON MAGNETOSTRICTIVE EFFECT IN MAGNETIC WIRES

摘要

The present invention relates to a procedure for measuring a d.c. magnetic field by means of a cylindrical device formed by a magnetostrictive core. A d.c. magnetic field is applied and the mechanical deformation on the device caused by the magnetic field is measured and compared with the obtained measurements from previous calibrations to estimate magnetic field intensity values.;The invention also relates to an apparatus for measuring a d.c. magnetic field by means of the indicated procedure. The apparatus comprises:- a cylindrical sensor element and an abutment/fixing element, such that the cylindrical sensor element experiences mechanical deformation when exposed to the d.c. magnetic field,- a deformation sensing device configured for detecting the mechanical deformation of the cylindrical sensor element, and- a processing unit configured for determining the intensity of the d.c. magnetic field based on the detected mechanical deformation of the cylindrical sensor element.