- Two active strain-gauge elements. One is mounted in the direction of axial strain, the other acts as a Poisson gauge and is mounted transverse (perpendicular) to the principal axis of strain.
- Completion resistors provide half bridge completion.
- Sensitive to both axial and bending strain.
- Compensates for temperature.
- Compensates for the aggregate effect on the principle strain measurement due to the Poisson's ratio of the specimen material.
- Sensitivity at 1000 me is ~ 0.65mVout/Vex input.
The following symbols apply to the circuit diagram and equations:
- R1 and R2 are half-bridge completion resistors.
- R3 is the active strain-gauge element measuring compression from Poisson effect.
- R4 is the active strain-gauge element measuring tensile strain.
To convert voltage readings to strain units use the following equation:
To simulate the effect on strain of applying a shunt resistor across R3, use the following equation:
No comments:
Post a Comment