Other than not being temperature compensated, can one use 4 quarter bridge configurations (2 either side) to calculate torque on a rotating shaft or does it have to be a half or full bridge.
2 COUPLES of Strain gauges at 45 and -45 degrees from shaft axis on both side as presented in this document (top of page 5)
hi Jean-Francois, thanks for the response. I have seen the document in the past. I know that this is the popular configuration for torque measurement using strain gauge but I am trying to understand why and why you would/wouldn't use a quarter bridge configuration and essentially have 4 quarter bridge gauges (still orientated as 45 and -45 to the shaft axis)
The full bridge design as depicted in the pdf is the most popular, as this leads to cancellation of effects due to bending and axial loads. Some explanation: http://www.kyowa-ei.com/eng/technical/notes/measurement/axis.html