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Related Experiment Videos

A sensorized thumb for force closed-loop control of hand neuroprostheses.

Jacopo Carpaneto1, Silvestro Micera, Franco Zaccone

  • 1Advanced Robotics Technologies and Systems Laboratory, Scuola Superiore Sant'Anna Valdera, 56025 Pisa, Italy.

IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
|February 13, 2004
PubMed
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This study introduces a sensorized thumb device that accurately captures grasp force during daily activities. The wearable sensor shows high reliability and can aid in controlling advanced hand neuroprostheses.

Area of Science:

  • Biomedical Engineering
  • Rehabilitation Technology
  • Human-Computer Interaction

Background:

  • Developing effective assistive devices for individuals with hand impairments requires accurate force sensing capabilities.
  • Existing methods for measuring grasp force can be cumbersome or lack the necessary precision for real-time applications.

Purpose of the Study:

  • To present and validate a novel sensorized thumb device for capturing grasp force during activities of daily living.
  • To assess the device's performance, repeatability, and potential applications in neuroprosthetics.

Main Methods:

  • A sensorized thumb was developed using a matrix of piezoresistive force sensors, an acquisition unit, and a wearable support.
  • The device underwent calibration and was tested by seven able-bodied subjects performing simulated daily living tasks.

Related Experiment Videos

  • Grasping patterns for different tasks, including palmar grasps, lateral pinch, and spherical volar grip, were analyzed.

    • Main Results:

    • The sensorized thumb successfully extracted useful force information in 98% of trials with good repeatability across various conditions.
    • Distinct force patterns were observed for different grasp types, with palmar grasps showing similarity and lateral/spherical grips showing differences.
    • The device demonstrated good performance and user acceptability.

    Conclusions:

    • The developed sensorized thumb is a reliable tool for acquiring grasp force data.
    • This technology holds significant potential for applications in force-controlled hand neuroprostheses and rehabilitation.
    • The device offers a practical solution for understanding and replicating human grasp dynamics.