Redundant torque sensor—multiple band arrays

A method for determining an external magnetic influence comprising:

• providing a component comprised of a ferromagnetic material and having a center axis;
• magnetizing the component in a manner to generate at least three opposing magnetic tracks of a magnetizable region wherein the adjacent magnetic tracks are magnetizable in opposite directions from each other, and at least two groups of adjacent magnetic tracks are arranged in an overlapping manner and axially displaced on the component relative to the center axis;
• arranging a first magnetic field sensor radially spaced from the component in a manner such that the first magnetic field sensor is assigned to the first and middle magnetic track, respectively, wherein the first magnetic field sensor is configured for emitting a signal;
• arranging a second magnetic field sensor radially spaced from the component in a manner such that the second magnetic field sensor is assigned to the middle and third magnetic track, wherein the second magnetic field sensor is configured for emitting a signal;
• and
• setting of the signal of the first sensor in relation to the signal of the second sensor.

A device for determining an external magnetic influence, comprising:

• a component having a center axis and comprising a ferromagnetic material, the component having a magnetizable region comprising at least three opposing magnetic tracks, wherein the adjacent magnetic tracks are magnetizable in opposite directions from each other, and at least two groups of adjacent magnetic tracks are arranged in an overlapping manner and axially displaced on the component;
• a first magnetic field sensor having at least two coils for emitting a signal, the first magnetic field sensor coils being arranged axially in relation to the component and being radially spaced from the component, the first magnetic field sensor coils being assignable to the first and middle magnetic track;
• a second magnetic field sensor with at least two coils for emitting a signal, the second magnetic field sensor coils being arranged axially in relation to the component and being radially spaced from the component, the second magnetic field sensor coils being assignable to the middle and third magnetic track;
• and
• wherein the signal of the first sensor is configured to be set in relation to the signal of the second sensor.