Patent ID: 8334689

Claim:
A rotational angle sensor, comprises: at least one electrical coil which is provided with turns; an influencing element which interacts with said coil and produces a different inductance of the least one coil as a function of a rotation position of the influencing element; and at least two separate coils which are arranged coaxially with respect to a coil axis and which have an axial interspacing; wherein: the influencing element is able to enter said interspacing with a degree of overlap, which is dependent on the rotation position, with the magnetic fields which are generated by the coils, the influencing element is configured to rotate about a shaft which is parallel to the coil axis to transmit a rotary movement which is to be sensed, and can enter the axial interspacing with a degree of overlap, which is dependent on the rotation position, with the magnetic fields which are generated by the coils, the influencing element is a body which is eccentrically mounted in relation to the shaft and is arranged in a plane perpendicular to the coil axis, and wherein at least one coil has a coil interior space with a cylindrical cross-section; and wherein the cross section of the rotatable influencing element is configured so that the inductance of the coils has a linear dependence on the rotational angle of the rotatable influencing element, at least in a rotational angle range of less than or equal to 360 degrees.