Patent ID: 6651519
Filing Date: 2003-11-25
Classification: G01L

Abstract:
A device for measuring torque in a drive assembly, comprising:a torsion element rotatingly drivable around a rotational axis, said torsion element being for transmitting torque; a reference element rotates with the torsion element, the reference element is torque-free for the torque range to be measured; a first transmitter element attached to the torsion element, said first transmitter element being moved along a rotational circle when the torsion element rotates; a second transmitter element attached to the reference element, said second transmitter element being movable along the rotational circle and being circumferentially offset relative to the first transmitter element; a sensor element stationarily positioned relative to the torsion element and the reference element, said sensor element being positioned opposite the rotational circle of the two transmitter elements, said sensor records the passage of the transmitter elements or of reference edges or reference faces of said transmitter element and generates a corresponding signal; and an evaluation unit, said evaluation unit receives the signals and determines the respective torque value from the offset of the signals, wherein the reference element participates in the transmission of torque once a predetermined torque value which exceeds the torque range to be measured has been reached.