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Customizable Optical Force Sensor for Fast Prototyping and Cost-Effective Applications.

Jorge A Díez1, José M Catalán2, Andrea Blanco3

  • 1Departamento de Ingeniería de Sistemas y Automática, Universidad Miguel Hernández de Elche, 03202 Elche, Spain. jdiez@umh.es.

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Summary
This summary is machine-generated.

This study introduces a low-cost optical force sensor using lens displacement and light distortion. It offers a cost-effective solution for prototyping and applications with undefined force requirements.

Keywords:
Prandtl–Ishlinskii modelcost-effective sensorhysteresis correctionoptical force sensorperceptronprintable sensor

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Area of Science:

  • Optical Engineering
  • Sensor Technology
  • Mechanical Engineering

Background:

  • High costs of commercial force sensors limit prototyping and specific applications.
  • Need for adaptable and inexpensive force measurement solutions.
  • Undefined force requirements in early design stages necessitate flexible sensor options.

Purpose of the Study:

  • To develop a cost-effective optical force sensor architecture for prototyping.
  • To enable force estimation in applications where commercial technologies are prohibitively expensive.
  • To investigate calibration models for sensors built with non-optical grade components.

Main Methods:

  • Developed an optical force sensor based on measuring lens displacement via refracted light beam distortion.
  • Attached the lens to a known elastic interface to correlate displacement with applied force.
  • Utilized fast prototyping technologies and non-optical grade elements for cost-effectiveness.
  • Proposed and tested four fitting models for sensor calibration to address manufacturing imperfections.

Main Results:

  • Two sensor prototypes with ranges of ±45 N and ±10 N were successfully implemented.
  • Calibration models were applied and validated against an industrial-grade load cell.
  • All proposed models achieved force estimation with an error of approximately 6% of the measurement range.

Conclusions:

  • The developed optical force sensor architecture is a viable, cost-effective solution for prototyping.
  • The proposed calibration models effectively compensate for imperfections in low-cost manufacturing.
  • This approach provides an accessible method for force measurement in research and development.