Classification of Individual Finger Flexions Using Ultrasound Radiofrequency Signals
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The objective of this thesis is to develop a wearable human machine interface (HMI) to classify individual finger flexions using ultrasound. To study the effect that lateral resolution has on the finger classification performance, 127 ultrasound radiofrequency (RF) signals are acquired from a 40 mm width probe. The acquired signals were reconstructed to show an estimated number of 4 - 8 reconstructed RF signals can maintain high accuracies to that of full resolution. The pattern classification pipeline of this study, using a computationally efficient spatial feature extraction method novel ultrasound-based studies, is verified to make accurate finger predictions every 100 ms in time throughout the full finger flexion recordings. Finally, using three 280µm thin wearable ultrasonic sensors attached to the forearm achieved a classification accuracy of 97.5 ± 2.9%. The results of this thesis provide the guidelines to design for wearable HMI applications.
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Copyright © 2020 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
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- 2020
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fernandes-classificationofindividualfingerflexionsusing.pdf | 2023-05-05 | Public | Download |