US 2011/0031960 A1 · Calibratable Multidimensional Magnetic Point Sensor

Abstract

A calibratable magnetic field sensor for sensing a first and a second spatial component of a magnetic field in a reference point, wherein the magnetic field includes a first and a second measurement field component and/or a first and a second calibration field component. The magnetic filed sensor includes a first sensor element arrangement including at least a first and a second sensor element for sensing the first magnetic field component, which includes a first measurement field component and/or a first calibration field component, with respect to a first spatial axis in the reference point. Furthermore, the magnetic field sensor includes a second sensor element arrangement for sensing the second magnetic field component, which includes a second measurement field component and/or a second calibration field component, with respect to a second spatial axis in the reference point. The magnetic filed sensor also includes an excitation line arranged with respect to the first sensor element arrangement so that, when impressing a default current into the excitation line, a pair of different asymmetrical default calibration field components in the first sensor element and in the second sensor element is generated with respect to the first spatial axis in the first sensor element arrangement, wherein the two spatial axes pass along linearly independent position vectors.

Claims27

Dependent claims

A calibratable magnetic field sensor for sensing a first and a second spatial component of a magnetic field in a reference point, wherein the magnetic field comprises a first and a second measurement field component and/or a first and a second calibration field component, comprising:

a first sensor element arrangement comprising at least a first and a second sensor element for sensing the first magnetic field component, which comprises a first measurement field component and/or a first calibration field component, with respect to a first spatial axis in the reference point;
a second sensor element arrangement for sensing the second magnetic field component, which comprises a second measurement field component and/or a second calibration field component, with respect to a second spatial axis in the reference point, wherein the two spatial axes pass along linearly independent position vectors;
an excitation line arranged with respect to the first sensor element arrangement so that, when impressing a default current into the excitation line, a pair of different asymmetrical default calibration field components in the first sensor element and in the second sensor element is generated with respect to the first spatial axis.

A method for sensing a first and a second spatial component of a magnetic field in a reference point, wherein the magnetic field comprises a first and a second measurement field component and/or a first and a second calibration field component, comprising:

sensing, in a first and a second sensor element of a first sensor element arrangement, a first pair of magnetic field components, which comprise first measurement field components and/or first calibration field components, with respect to a first spatial axis in the reference point;
sensing, in a second sensor element arrangement, second magnetic field components, which comprise second measurement field components and/or second calibration field components, with respect to a second spatial axis in the reference point, wherein the two spatial axes pass along linearly independent position vectors;
and
generating a first pair of different asymmetrical calibration field components with respect to the first spatial axis in the first and the second sensor element of the first sensor element arrangement.

1 more element

Dependencies are inferred from the claim text.

Calibratable Multidimensional Magnetic Point Sensor

Life of this patent

Calibratable Multidimensional Magnetic Point Sensor

Life of this patent

Abstract

Claims27