Eaton Corporation

Delphi Technologies, Inc.

Markus Leuschner

Gerd Rudolph

Klaus Schnell

Reiner Luley

A device for the determination of the degree of relative rotation between two parts or members with respect to each other about a main axis, the device comprising a first detector arrangement, which includes a rotation-imparting element and produces precise information indicating a relative angular position of the two members within the range of 0&deg; and 360&deg;, and comprising a second detector arrangement, which produces approximate information in order to be able to distinguish between full rotations. The second detector arrangement comprises a gear drive ( ) driven by the relative rotary motion of the two members and an absolute position sensor ( ) for the determination of the position of a measuring element ( ) moved by the gear drive ( ). The dimensions of the gear drive ( ) are such that the maximum possible range of relative rotation between the two members parts corresponds to a range of motion of the measuring element ( ), within which range all positions can be distinguished from each other in a geometric manner and which range can be resolved by the position sensor ( ) at a resolution corresponding at least to the full rotations between the two members.

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Bretzenheim, Germany

Markus Leuschner