Instrumentation Amplifier with Alarm Strain gauges measuring the deflection of a sintered metal column are connected to
Question:
Instrumentation Amplifier with Alarm Strain gauges measuring the deflection of a sintered metal column are connected to a Wheatstone bridge. The output of the bridge is balanced when there is no strain producing 0 V output. As the column is deflected, the bridge produces 200 mV per ohm change caused by the strain gauges. The maximum possible defection would result in a 5-V change. Design an instrumentation amplifier that can take the voltage created in the bridge and send it to a 0-5V ADC, where no defection produces 0 V at the ADC and maximum deflection produces 5 V. To avoid loading, send the output of the bridge to a very high input resistance difference amplifier. The columns being tested are brittle and can shatter violently if the conditions cause the strain gauges to change by more than 4.5 V. For safety, connect the output of your instrumentation amplifier to a comparator circuit that will trigger an alarm when the strain causes the resistance to change by 4.3 V. The alarm needs to be triggered by 15 V.
Step by Step Answer:
The Analysis And Design Of Linear Circuits
ISBN: 9781118214299
7th Edition
Authors: Roland E Thomas, Albert J Rosa, Gregory J Toussaint