Device for compensation of external magnetic stray fields or to compensate the influence of a magnetic field gradient to a magnetic field sensor

摘要

Device for compensating an influence of a magnetic field gradient, which by means of a geometry of the at least one first component (1) can be produced on a magnetic field sensor (17, 18).The device comprises at least two magnetic field sensors (17, 18), the outside of the magnetic equilibrium a further ferromagnetic component (1) are arranged.The apparatus further comprises at least two magnetic field sensors (17, 18), which in each case have a mutually differing sensitivity.The magnetic field sensor (17, 18), which, due to its spatial arrangement relative to the further ferromagnetic component (1), in comparison to the other magnetic field sensor (17, 18) in a higher degree is exposed to the influence of the magnetic field gradients, a sensitivity, through which deviates the sensitivity of the other sensor.