Magnetic field sensor calibratable during measurement operation and method for calibrating a magnetic field sensor during measurement operation

摘要

A magnetic field sensor for detecting first, second, and third spatial components of a magnetic field at a reference point includes a first sensor element arrangement for detecting the first magnetic field component having a first measurement field component and a first calibration field component with respect to a first spatial axis at a reference point, a second sensor element arrangement for detecting the second magnetic field component having a second measurement field component and a second calibration field component with respect to a second spatial axis y at the reference point and a third sensor element arrangement for detecting the third magnetic field component having a third measurement field component and a third calibration field component with respect to a third spatial axis x at the reference point. An excitation line is arranged such with respect to the three sensor element arrangements that when impressing a predetermined current into the excitation line respective predetermined calibration field components with respect to the spatial axes in the sensor element arrangements are generated.

主权项

1. A magnetic field sensor calibratable during measurement operation for detecting first, second, and third spatial components Bz By and Bx of a magnetic field at a reference point, wherein the magnetic field comprises at least one of measurement field components and calibration field components, wherein the measurement field components comprise first, second, and third measurement field components BMz, BMy and BMx, and wherein the calibration field components comprise first, second, and third calibration field components BKz, BKy and BKx, comprising:
a first sensor element arrangement for detecting the first magnetic field component Bz comprising at least one of a first measurement field component BMz and a first calibration field component BKz, with respect to a first spatial axis z at the reference point; a second sensor element arrangement for detecting the second magnetic field component By comprising at least one of a second measurement field component BMy and a second calibration field component BKy, with respect to a second spatial axis y at the reference point; a third sensor element arrangement for detecting the third magnetic field component Bx comprising at least one of a third measurement field component BMx and a third calibration field component BKx, with respect to a third spatial axis x at the reference point; and an excitation line arranged such with respect to the first, second, and third sensor element arrangements that when impressing a predetermined current into the excitation line, a first predetermined calibration field component BKz with respect to the first spatial axis x in the first sensor element arrangement is generated, a second predetermined calibration field component BKy with respect to the second spatial axis y in the second sensor element arrangement is generated, and a third predetermined calibration field component BKx with respect to the third spatial axis x in the third sensor element arrangement is generated, wherein the three spatial axes z, y, and x run along linearly independent position vectors.