question archive You are using a half-bridge circuit to measure the strain on a beam
You are using a half-bridge circuit to measure the strain on a beam
Subject:Mechanical EngineeringPrice: Bought3
You are using a half-bridge circuit to measure the strain on a beam. Both
strain gauges have strain gauge factors of 1.96 and nominal resistances of 120 Ω. The other two resistors used in the circuit have nominal resistances of 120 Ω. A fixed power supply is used to apply a 9.00 V source voltage to the bridge circuit. Under no load conditions, the bridge has an output voltage of 2.30 mV.
a) If the beam experiences an axial strain of 388 microstrain, what output voltage do you expect from the bridge circuit?
b) You perform the measurement and observe an output voltage of 6.45 mV from the bridge circuit. What is the axial strain on the beam in microstrain?
