User`s guide
68
To achieve an output signal of 1mV per , the gain (G) needs to satisfy:
Therefore,
For this experiment, gage factor (F) is 2.095.
3.1.3 Calculate Strain Simulated by Shunt Resistors
Calculate the strain simulated by shunt resistors.
The connected shunt resistors are parallel to the gage, the equivalent resistance is:
Therefore,
Gage factor is 2.095 0.5% for the gauge chosen for this experiment. Resistance without deformation is
120.
3.2 Setup
For measurement of strain via a bonded resistance strain gage, it must be connected to an electrical
measuring circuit which can accurately measure changes in resistance. Strain-gage transducers usually
employ four strain elements electrically connected to form a Wheatstone bridge. This bridge circuit
compensates for temperature effects. Quarter bridge strain gauge circuits are appropriate for this purpose.
3.2.1 Hardware setup
1. Prepare 3 cans of sodas; they should be of the exact same brand and product.
2. Strain gauges should be mounted in hoop direction of the soda can.
Eq.18
Eq.19
Eq.17