System for sensing absolute torque and a module comprising it

Details System for sensing absolute torque and a module comprising it System for sensing absolute torque and a module comprising it

2007-07-31

2007-07-31

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Dynamometers

Responsive to torque

C073S862332

Reexamination Certificate

active

10984835

ABSTRACT:
A system for determining the absolute torque applied to a rotating shaft includes a sensitive element that is deformable under torsion and a measuring device having first and second coders that are intended to be rotationally fixed, respectively, in the vicinity of each end of the sensing element. The coders have a singularity or several equally distributed singularities; first and second fixed sensors disposed opposite to and at an air gap which is a predetermined distance from, respectively, the first and second coders, wherein each sensor is able to deliver a signal having a pulse corresponding to the detection of a singularity of the coder. The system also includes a device for processing the signals transmitted by the sensors that is able to calculate the angular difference between the singularities in order to determine, by comparison with a calibration difference, the absolute torque applied.

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