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Sensors 2016, 16(6), 811; doi:10.3390/s16060811

A Synergy-Based Optimally Designed Sensing Glove for Functional Grasp Recognition

1
Centro di Ricerca “E. Piaggio”, University of Pisa, Largo Lucio Lazzarino 1, Pisa 56126, Italy
2
Advanced Robotics Department, Istituto Italiano di Tecnologia, via Morego 30, Genova 16163, Italy
3
Information Engineering Department, University of Pisa, via G. Caruso 16, Pisa 56122, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Oliver Amft
Received: 8 February 2016 / Revised: 28 May 2016 / Accepted: 28 May 2016 / Published: 2 June 2016
(This article belongs to the Special Issue Wearable Sensors)
View Full-Text   |   Download PDF [2714 KB, uploaded 2 June 2016]   |  

Abstract

Achieving accurate and reliable kinematic hand pose reconstructions represents a challenging task. The main reason for this is the complexity of hand biomechanics, where several degrees of freedom are distributed along a continuous deformable structure. Wearable sensing can represent a viable solution to tackle this issue, since it enables a more natural kinematic monitoring. However, the intrinsic accuracy (as well as the number of sensing elements) of wearable hand pose reconstruction (HPR) systems can be severely limited by ergonomics and cost considerations. In this paper, we combined the theoretical foundations of the optimal design of HPR devices based on hand synergy information, i.e., the inter-joint covariation patterns, with textile goniometers based on knitted piezoresistive fabrics (KPF) technology, to develop, for the first time, an optimally-designed under-sensed glove for measuring hand kinematics. We used only five sensors optimally placed on the hand and completed hand pose reconstruction (described according to a kinematic model with 19 degrees of freedom) leveraging upon synergistic information. The reconstructions we obtained from five different subjects were used to implement an unsupervised method for the recognition of eight functional grasps, showing a high degree of accuracy and robustness. View Full-Text
Keywords: kinematic wearable sensing; human hand synergies; under-sensing; optimal design kinematic wearable sensing; human hand synergies; under-sensing; optimal design
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ciotti, S.; Battaglia, E.; Carbonaro, N.; Bicchi, A.; Tognetti, A.; Bianchi, M. A Synergy-Based Optimally Designed Sensing Glove for Functional Grasp Recognition. Sensors 2016, 16, 811.

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