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Related Concept Videos

Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

797
A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
797

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Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping
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Grasp specific and user friendly interface design for myoelectric hand prostheses.

Alireza Mohammadi, Jim Lavranos, Rob Howe

    IEEE ... International Conference on Rehabilitation Robotics : [Proceedings]
    |August 18, 2017
    PubMed
    Summary

    A new hand prosthesis design simplifies control for amputees, reducing abandonment rates. A simple button interface proved faster and more accurate than EMG for selecting hand movements.

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    Area of Science:

    • Biomedical Engineering
    • Rehabilitation Engineering
    • Human-Computer Interaction

    Background:

    • Multi-articulated powered hand prostheses are often abandoned due to complex operation.
    • Amputees frequently choose simpler devices with fewer, but more reliable, functions.
    • Existing EMG-based control methods can be difficult to learn and master for preshape selection.

    Purpose of the Study:

    • To design a hand prosthesis with a low-complexity user interface for intuitive control.
    • To develop an alternative to EMG for preshape selection, focusing on speed and reliability.
    • To enable amputees to intuitively and quickly execute intended hand movements for activities of daily living (ADLs).

    Main Methods:

    • Simultaneous design of a hand prosthesis with a limited grasp set and a simplified user interface.
    • Investigation of a button-based control method as an alternative to electromyography (EMG) for preshape selection.
    • Experimental comparison of simplified EMG and button control for speed and accuracy in selecting intended preshapes using able-bodied subjects.

    Main Results:

    • The button control method was significantly faster for successful task completion compared to simplified EMG.
    • The button control method showed marginally superior accuracy (success on the first attempt).
    • This suggests a simpler, button-based interface can improve prosthesis usability.

    Conclusions:

    • A simplified hand prosthesis design with a button interface offers a more intuitive and reliable control method for amputees.
    • This approach addresses the high abandonment rates associated with complex powered prostheses.
    • The findings support the development of user-friendly prosthetic control systems for enhanced daily living.