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Optimised circuit design for precise bite force measurement using flexiforce sensors.
Prakyath Shetty1, Ravi M S2, Murali P S2
1Department of Electronics and Communication Engineering, Nitte (Deemed to be University), NMAM Institute of Technology (NMAMIT), Nitte, India.
Journal of Medical Engineering & Technology
|August 9, 2025
Summary
This study enhanced bite force measurement using optimized circuits. A feedback resistor configuration accurately measured forces up to 100kg, improving dental diagnostic reliability.
Area of Science:
- Biomedical Engineering
- Dental Materials Science
- Sensor Technology
Background:
- Precise bite force measurement is crucial for dental diagnostics, including restorations and orthodontics.
- Existing sensors may have limitations in range and accuracy for high-force dental applications.
Purpose of the Study:
- To calibrate and evaluate the Flexiforce A301 sensor for extended measurement range.
- To optimize low-drive voltage circuits for improved bite force sensing.
Main Methods:
- Designed and simulated three circuit configurations (voltage divider, feedback resistor, feedback resistor with capacitor) using LTspice.
- Experimentally validated the performance of each circuit configuration.
Main Results:
- The feedback resistor configuration demonstrated superior linearity and stability.
- This optimized circuit successfully measured forces up to 100 kg, exceeding other tested configurations.
- The enhanced system offers improved reliability and an extended measurement range.
Conclusions:
- Optimized low-drive voltage circuits significantly enhance the performance of the Flexiforce A301 sensor.
- The feedback resistor configuration provides a robust and accurate solution for high-force dental bite measurements.
- This advancement supports more reliable dental diagnostics and treatment evaluations.
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