Measuring and testing – Dynamometers – Responsive to torque
Reexamination Certificate
2006-10-04
2008-09-23
Noori, Max (Department: 2855)
Measuring and testing
Dynamometers
Responsive to torque
C073S862333
Reexamination Certificate
active
07426877
ABSTRACT:
A device for determining the actual reversal of the direction of rotation of a rotational drive continuing to operate after previous switching of the direction of rotation, in particular for window lifting systems or sliding roof drives in a motor vehicle, has a sensor wheel (1) with a coding structure (9) configured asymmetrically in respect of distribution along the periphery of the sensor wheel (1); a single detector (2), which generates a rotor speed-dependent pulse signal during rotation of the sensor wheel (1) by scanning the coding structure (9); and an evaluation unit (4), to which the pulse signal is fed and which determines the actual reversal of the direction of rotation by evaluating the pulse edges; wherein the coding structure (9) is formed by coding sectors (10) of a first sector width (11) and a reference coding sector pair (12) with a second sector width (13).
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Ehrlich Stefan
Stöger Christian
Baker & Botts L.L.P.
Noori Max
Siemens Aktiengesellschaft
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