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Thick-film force and slip sensors for a prosthetic hand

Cranny, A, Cotton, DPJ, Chappell, PH, Beeby, SP and White, NM, French, PJ(ed.) (2005) Thick-film force and slip sensors for a prosthetic hand Sensors and Actuators A: Physical, 123-12, pp. 162-171.

Record type: Article

Abstract

In an attempt to improve the functionality of a prosthetic hand device, a new fingertip has been developed that incorporates sensors to measure temperature and grip force and to detect the onset of object slip from the hand. The sensors have been implemented using thick-film printing technology and exploit the piezoresistive characteristics of commercially available screen printing resistor pastes and the piezoelectric properties of proprietary lead-zirconate-titanate (PZT) formulated pastes. The force sensor exhibits a highly linear response to forces up to 50 N with a maximum hysteresis of less than 1.4% of full scale. When configured as a pseudo half-bridge measurement circuit, the force sensor demonstrates superior insensitivity to the position of the force on the fingertip than when configured as a classic half-bridge circuit. The force sensor response is also extremely stable with temperature, typically showing variation in the output response of less than ±0.04% over the temperature range ?10 °C to +35 °C when loaded with forces up to 10.8 N. The ability of the piezoelectric PZT vibration sensor to detect small vibrations of the cantilever, indicative of object slip, has also been demonstrated.

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More information

Published date: September 2005
Keywords: Thick-film, force sensor, slip sensor, prosthesis, prosthetic hand
Organisations: EEE

Identifiers

Local EPrints ID: 261230
URI: http://eprints.soton.ac.uk/id/eprint/261230
ISSN: 0924-4247
PURE UUID: bf4468bc-9379-455b-b04e-9d730e1da6f0
ORCID for SP Beeby: ORCID iD orcid.org/0000-0002-0800-1759
ORCID for NM White: ORCID iD orcid.org/0000-0003-1532-6452

Catalogue record

Date deposited: 19 Sep 2005
Last modified: 18 Jul 2017 09:04

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Contributors

Author: A Cranny
Author: DPJ Cotton
Author: PH Chappell
Author: SP Beeby ORCID iD
Author: NM White ORCID iD
Editor: PJ French

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