The wireless torque measurement system described in this paper uses a strain ring, which is attached onto a
shaft without a surface preparation and complicated installing procedures. The strain ring is fastened simply
Strain gauge
bridge Bridge amplifier
μC
Temperature measurement
XBee
XBee
PC
16-bit
ADC
control/reset control/data
control/data
control/data
control/data
Bridge reset
Dataflow control
ADC timing
Data packeting
Filtering
Data storing
Figure plotting
Signal processing
Remote control
On shaft unit
RCAX80/TO DABU AD2T-2Q-0350 ADS-7813
ATmega-128
MATLAB
USB
UART
SPI
+-10V
Battery
DC
DC
7,4 V
24 V
by tightening up pair of screws. Essential parameter of strain ring is bipolar torque measurement range.
Disadvantage is that specific collar is required for each different shaft diameter. However advantage of collar
based attachment is easy and fast change to another measurement place onto system with same shaft
diameter. Due to wireless communication scheme there’s no external cabling required.