Inductive torque sensor for rotating shifts

A torque sensor, comprising:

• rotor circuitry including a first target coil and a second target coil, the first target coil and the second target coil each configured to be disposed coaxially about a torsion element and to rotate with respect to one another to form a torsion angle in response to rotation of the torsion element when torque is transmitted, the first target coil having a k-fold rotational symmetry of a first periodicity, and the second target coil having a k-fold rotational symmetry of a second periodicity that is different than the first periodicity;
• and
• stator circuitry including a first pickup coil system having at least two first pickup coils configured to be disposed coaxially about the torsion element, and a second pickup coil system having at least two second pickup coils configured to be disposed coaxially about the torsion element, the at least two first pickup coils having a k-fold rotational symmetry matching the first periodicity, and the at least two second pickup coils having a k-fold rotational symmetry matching the second periodicity,
• wherein the stator circuitry is configured to calculate the torsion angle based upon signals induced in the at least two first pickup coils via inductive coupling with the first target coil and based upon signals induced in the at least two second pickup coils via inductive coupling with the second target coil,
• wherein the first target coil and the second target coil are each configured to be disposed on the same side of the stator circuitry,
• wherein the first target coil is configured to be disposed closer to the stator circuitry than the second target coil, and
• wherein the first periodicity of the first target coil is greater than the second periodicity of the second target coil.