MAGNETIC 3D POINT SENSOR CAPABLE OF BEING CALIBRATED DURING MEASUREMENT OPERATION

摘要

A magnetic field sensor (100) capable of being calibrated during measurement operation for detecting a first, second and third spatial component B_z, B_y and B_x of a magnetic field at a reference point (101), wherein the magnetic field has a first, second and third measurement field component B_Mz, B_My, B_Mx and a first, second and third calibration field component B_Kz, B_Ky and B_Kx. The magnetic field sensor (100) comprises a first sensor element arrangement (102) for detecting the first magnetic field component B_z, which has a first measurement field component B_Mz and a first calibration field component B_Kz, with respect to a first spatial axis z at the reference point (101), a second sensor element arrangement (104) for detecting the second magnetic field component B_y, which has a second measurement field component B_My and a second calibration field component B_Ky, with respect to a second spatial axis y at the reference point (101) and a third sensor element arrangement (106) for detecting the third magnetic field component B_x, which has a third measurement field component B_Mx and a third calibration field component B_Kx, with respect to a third spatial axis x at the reference point (101). The magnetic field sensor (100) also comprises a field line, which is arranged with respect to the first (102), second (104) and third sensor element arrangement (106) in such a way that, when a predetermined current is injected into the field line (108), a first predetermined calibration field component B_Kz with respect to the first spatial axis z in the first sensor element arrangement is produced, a second predetermined calibration field component B_Ky with respect to the second spatial axis y in the second sensor element arrangement is produced and a third predetermined calibration field component B_Kx with respect to the third spatial axis x in the third sensor element arrangement is produced, wherein the three spatial axes z, y and x run along linearly independent position vectors.