Method and device for determining the torque exerted on a rotating body which can be rotationally driven around a rotational axis
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United States of America Patent
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Mar 12, 2002
Grant Date -
N/A
app pub date -
Jul 23, 1999
filing date -
Nov 27, 1997
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Abstract
The invention relates to a method and a device for determining the torque exerted on a body of revolution 2 capable of being driven rotatably about an axis of rotation 1. The device possesses a first and a second measurement generator 3 and 4 which are arranged on the body of revolution 2 at an axial distance from one another and which consist of rings 7 and 8 radially surrounding the body of revolution 2 and composed of fields having an alternately different signal behavior. At the same time, the number of fields of the two rings 7 and 8 is identical. The first measurement generator 3 is assigned a first measurement transducer 9 and the second measurement generator 4 is assigned a second measurement transducer 10, the measurement transducers both supplying output signals, from which first and second square-wave signals 11 and 12 are formed, the torque being determined from the distances between edges of the first and second square-wave signals over one complete revolution of the body of revolution 2.
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