Magnetic field sensor e.g. anisotropic magnetic resistive sensor for, e.g. rolling bearing, receives magnetic field from magnetic field generation element, and detects changes of magnetic field caused by accumulation of metal particles

摘要

#CMT# #/CMT# The magnetic field sensor (01) receives magnetic field generated by magnetic field generation element (07). The changes of the magnetic field caused by the accumulation of metal particles (09), are detected. A monitoring unit is coupled with the magnetic field sensor, to emit signal based on the detection of critical amount of metal particles. #CMT# : #/CMT# An independent claim is included for rolling bearing. #CMT#USE : #/CMT# Magnetic field sensor e.g. anisotropic magnetic resistive (AMR) sensor or giant magnetic resistive (GMR) sensor for detecting wear-related ferromagnetic metal particles in lubricant of rolling bearing or slide bearing (all claimed). #CMT#ADVANTAGE : #/CMT# The pitting effect in the bearing and associated damages can be recognized in an early stage, and the signal for maintenance or replacement of the component can be provided. The magnetic field sensor can also detect the metal particle in nanometer range. Permanent electronic monitoring of bearing state can be ensured such that large machine failures and downtimes of the magnetic field sensor can be avoided. The sensing element of the magnetic field sensor is planar such that the space requirement of the magnetic field sensor in the bearing is reduced. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of the magnetic field sensor. 01 : Magnetic field sensor 02 : Inner ring 03 : Outer ring 07 : Magnetic field generation element 09 : Metal particle.