Towards natural multi-DoF prosthetic control with distributed ultrasound
File(s)
Accepted version
Author(s)
Type
Conference Paper
Abstract
Powered hand prostheses are essential to support limb-difference users living independently. However, prosthesis abandonment rates are high due to a mismatch between the user’s needs and the performance of current surface electromyography-powered prostheses. Ultrasound has been proposed as an alternative modality of interfacing, but current work has mainly investigated offline scenarios or virtual benchtop validations. To advance in this area, we designed a custom socket and prosthesis solution with 32 distributed single-element transducers to record line-scanning ultrasound across the stump of one participant. A machine learning model was trained, allowing the participant to voluntarily control simultaneous wrist rotation and hand aperture. Offline cross-validation showed a high performance with an r-square of 0.69 ± 0.26. An Online experiment demonstrated that the participant was able to complete the virtual target achievement control task, the box and blocks test, and the clothespin relocation test in an accurate way. This marks the first functional demonstration of A-mode ultrasound-based simultaneous and proportional control, demonstrating its potential for natural and flexible control of prosthetic hands.
Date Issued
2024-09-18
Date Acceptance
2024-09-01
Citation
2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS), 2024, pp.1-6
Publisher
IEEE
Start Page
1
End Page
6
Journal / Book Title
2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS)
Copyright Statement
© 2024 IEEE. This is the author’s accepted manuscript made available under a CC-BY licence in accordance with Imperial’s Research Publications Open Access policy (www.imperial.ac.uk/oa-policy)
License URL
Sponsor
Commission of the European Communities
Identifier
https://doi.org/10.1109/uffc-js60046.2024.10793502
Grant Number
899822
Source
2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS)
Publication Status
Published
Start Date
2024-09-22
Finish Date
2024-09-26
Coverage Spatial
Taipei, Taiwan