Troubleshooting Mass Measurement Experiment w/ Strain Gauge Sensor

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SUMMARY

The discussion centers on troubleshooting a mass measurement experiment utilizing a strain gauge sensor configured in a Wheatstone bridge circuit. The setup includes two strain gauges and three 741 operational amplifiers for signal amplification. The user reports inconsistent voltage outputs for varying masses, indicating a calibration issue. The need for a schematic to diagnose the circuit further is emphasized.

PREREQUISITES
  • Understanding of Wheatstone bridge configurations
  • Knowledge of operational amplifier (op-amp) functionality, specifically the 741 model
  • Familiarity with strain gauge sensor principles
  • Basic circuit design and analysis skills
NEXT STEPS
  • Research Wheatstone bridge calibration techniques
  • Learn about operational amplifier circuit design and troubleshooting
  • Explore strain gauge signal conditioning methods
  • Investigate instrumentation amplifier configurations for improved accuracy
USEFUL FOR

Electronics engineers, experimental physicists, and anyone involved in precision measurement and sensor calibration will benefit from this discussion.

buffster88
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imdoin an experiment with a strain gauge sensor to measure mass. the 2 strain gauges are in a wheatstone bridge and the wheatstone bridge is connected to 3 741 op amps to amplify the signal. i need an output of cetain voltages for certain masses input.


My circuit is giving an output to high or too low for my requirement and when I get it right for 1 mass, it goes wrong for the next. Can anyone help? Need it urgently



Im using a pot to vary the resistance in the instrumentation amp circuit.
 
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Welcome to PF.
It would be nice if you could provide a schematic of your circuit.
 

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