TY - GEN
T1 - A Time-Discrete Haptic Feedback System for Use by Persons with Lower-Limb Prostheses During Gait
AU - Kaplan, Gabe
AU - McDaniel, Troy
AU - Abbas, James
AU - Tadayon, Ramin
AU - Panchanathan, Sethuraman
N1 - Funding Information:
Acknowledgements. The authors thank Arizona State University and the National Science Foundation for their funding support. This material is partially based upon work supported by the National Science Foundation under Grant No. 1828010.
Publisher Copyright:
© 2019, Springer Nature Switzerland AG.
PY - 2019
Y1 - 2019
N2 - Persons with lower-limb amputations experience limited tactile knowledge of their prostheses due to the loss of sensory function from their limb. This sensory deficiency has been shown to contribute to improper gait kinematics and impaired balance. A novel haptic feedback system has been developed to address this problem by providing the user with center of pressure information in real-time. Five piezoresistive force sensors were adhered to an insole corresponding to critical contact points of the foot. A microcontroller used force data from the insole to calculate the center of pressure, and drive four vibrotactile pancake motors worn in a neoprene sleeve on the medial thigh. Center of pressure information was mapped spatially from the plantar surface of the foot to the medial thigh. Human perceptual testing was conducted to determine the efficacy of the proposed haptic display in conveying gait information to the user. Thirteen able-bodied subjects wearing the haptic sleeve were able to identify differences in the speed of step patterns and to classify full or partial patterns with (92.3 ± 2.6)% and (94.9 ± 2.1)% accuracy respectively. The results suggest that the system was effective in communicating center of pressure information through vibrotactile feedback.
AB - Persons with lower-limb amputations experience limited tactile knowledge of their prostheses due to the loss of sensory function from their limb. This sensory deficiency has been shown to contribute to improper gait kinematics and impaired balance. A novel haptic feedback system has been developed to address this problem by providing the user with center of pressure information in real-time. Five piezoresistive force sensors were adhered to an insole corresponding to critical contact points of the foot. A microcontroller used force data from the insole to calculate the center of pressure, and drive four vibrotactile pancake motors worn in a neoprene sleeve on the medial thigh. Center of pressure information was mapped spatially from the plantar surface of the foot to the medial thigh. Human perceptual testing was conducted to determine the efficacy of the proposed haptic display in conveying gait information to the user. Thirteen able-bodied subjects wearing the haptic sleeve were able to identify differences in the speed of step patterns and to classify full or partial patterns with (92.3 ± 2.6)% and (94.9 ± 2.1)% accuracy respectively. The results suggest that the system was effective in communicating center of pressure information through vibrotactile feedback.
KW - Haptic feedback
KW - Lower-limb rehabilitation
KW - Prosthesis
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U2 - 10.1007/978-3-030-23563-5_21
DO - 10.1007/978-3-030-23563-5_21
M3 - Conference contribution
AN - SCOPUS:85069689774
SN - 9783030235628
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 250
EP - 261
BT - Universal Access in Human-Computer Interaction. Multimodality and Assistive Environments - 13th International Conference, UAHCI 2019, Held as Part of the 21st HCI International Conference, HCII 2019, Proceedings
A2 - Antona, Margherita
A2 - Stephanidis, Constantine
PB - Springer Verlag
T2 - 13th International Conference on Universal Access in Human-Computer Interaction, UAHCI 2019, held as part of the 21st International Conference on Human-Computer Interaction, HCI International 2019
Y2 - 26 July 2019 through 31 July 2019
ER -