Patent ID: 6556007
Filing Date: 2003-04-29
Classification: G01R

Abstract:
A bearing sensor comprising:a plane coil having at least a pair of opposed conductor sides, the opposed conductor side pair composed of a first side and a second side which are parallel to one another, and at least one magneto resistive element pair of two magneto resistive thin plates located on a plane parallel to and adjacent to the plane coil, the magneto resistive element pair having a first magneto resistive thin plate and a second magneto resistive thin plate, the first magneto resistive thin plate of the magneto resistive element pair having a longitudinal direction crossing only the first side at an angle of more than 30 degrees and less than 90 degrees, the second magneto resistive thin plate of the magneto resistive element pair having a longitudinal direction crossing only the second side at an angle of more than 30 degrees and less than 90 degrees, the longitudinal direction of the first magneto resistive thin plate being not parallel to the longitudinal direction of the second magneto resistive thin plate, and each of the magneto resistive thin plates electrically connected at one terminal thereof to the other and a voltage for measuring bearings is applied between the other terminals so that a potential is taken out from the one terminal according to bearings.