The steady state torque measurement on rotary shafts is
now well developed using dynamometer DC generator and
strain gauges, whereas the instantaneous torque measurement
suffers from poor bandwidth and accuracy [1].
The recent development of MEMS
(microelectromechanical systems) leads to a new kind of
accelerometers based on surface micromachined capacitive
sensors [2]. They permit new prospective studies for
instantaneous force and torque measurement.
In this paper, we present the development of a wireless
instantaneous torque measurement based on a pair of 2-axis
MEMS accelerometers embedded on a rotating shaft. Signal
commissioning and transmission are discussed, as well as, the
experimental results we obtained for a torque estimation of an
induction motor on a direct startup and for a speed inversion
under vector control.