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A preliminary study on characterisation of finger interface kinetics using a pressure and shear sensor system

HALE N; VALERO M; TANG J; MOSER D; JIANG L
PROSTHET ORTHOT INT , 2018, vol. 42, n° 1, p. 60-65
Doc n°: 187054
Localisation : Documentation IRR

D.O.I. : http://dx.doi.org/DOI:10.1177/0309364617728121
Descripteurs : EC15 - PROTHESE DE MEMBRE SUPERIEUR

Our hands constantly handle objects throughout our lives, where a
crucial component of this interaction is the detection of grasping (pressure) and
slipping (shear) of the object. While there have been a large amount of studies
using pressure sensors for grasping detection, synchronised pressure and shear
detection at the finger/object interface is still needed.
This study
aims to assess the feasibility of a sensor system designed to detect both
pressure and shear at the fingertip/object interface via a single subject test.
STUDY DESIGN: Descriptive study, proof of concept. METHODS: One healthy subject
participated in the study and was asked to perform a single finger test protocol
and a simple hand test protocol. The corresponding multidirectional loads at the
fingertip/object interface were measured in real time using a pressure and shear
sensor system. RESULTS: Results from the finger test protocol show peak values of
up to approximately 50 kPa (5 N) and 30 kPa (3 N) of pressure for each test,
respectively. Results from the hand test protocol show a pressure and shear
profile that shows a large increase in grip force during the initial grasping of
the object, with a peak pressure of approximately 50 kPa (5 N). The pressure and
shear profile demonstrates that the load is not evenly distributed across all
digits. CONCLUSION: This study provides evidence that the reported sensor system
has sufficient resolution, dynamic response and load capability to capture
biomechanical information during basic protocols and hand-grasping tasks.
Clinical relevance The presented sensor system could be potentially used as a
tool for measuring and evaluating hand function and could be incorporated into a
prosthetic hand as a tactile feedback system.

Langue : ANGLAIS

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