I. INTRODUCTION
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.