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A pressure and shear sensor system for stress measurement at lower limb residuum/socket interface A pressure and shear sensor system for stress measurement at lower limb residuum/socket interface A pressure and shear sensor system for stress measurement at lower limb residuum/socket interface A sensor system for measurement of pressure and shear at the lower limb residuum/socket interface is described. The system comprises of a flexible sensor unit and a data acquisition unit with wireless data transmission capability. Static and dynamic performance of the sensor system was characterised using a mechanical test machine. The static calibration results suggest that the developed sensor system presents high linearity (linearity error ~ 3.8%) and resolution (0.9kpa for pressure and 0.2kpa for shear). Dynamic characterisation of the sensor system shows hysteresis error of approximately 15% for pressure and 8% for shear. Subsequently, a pilot amputee walking test was conducted. Three sensors were placed at the residuum/socket interface of a knee disarticulation amputee and simultaneous measurements were obtained during pilot amputee walking test. The pressure and shear peak values as well as their temporal profiles are presented and discussed. In particular, peak pressure and shear of approximately 58kPa and 27kPa, respectively, were recorded. Their temporal profiles also provide dynamic coupling information at this critical residuum/socket interface. These preliminary amputee test results suggest strong potential of the developed sensor system for exploitation as an assistive technology to facilitate socket design, socket fit and effective monitoring of lower limb residuum health. pressure and shear sensor, residuum/socket interface, lower-limb amputees 10.1016/j.medengphy.2016.04.007 1350-4533 695-700 Laszczak, Piotr ea4976f2-006b-4be6-b49a-9d4a88c1a4bf Mcgrath, Michael 32b5ce9d-eada-4edb-9c2e-ebc4d05142e9 Tang, Jing b4b9a22c-fd6d-427a-9ab1-51184c1d2a2c Gao, Jianliang 84cfd2ed-c48c-4d9f-9e7c-49afc7cc6e4d Jiang, Liudi 374f2414-51f0-418f-a316-e7db0d6dc4d1 Bader, Dan 9884d4f6-2607-4d48-bf0c-62bdcc0d1dbf Moser, David 09874cab-348f-47f9-b018-1c2875d16998 Zahedi, S. 5b9f308c-b703-4a7a-a85a-03311c3419a1 July 2016 Laszczak, Piotr ea4976f2-006b-4be6-b49a-9d4a88c1a4bf Mcgrath, Michael 32b5ce9d-eada-4edb-9c2e-ebc4d05142e9 Tang, Jing b4b9a22c-fd6d-427a-9ab1-51184c1d2a2c Gao, Jianliang 84cfd2ed-c48c-4d9f-9e7c-49afc7cc6e4d Jiang, Liudi 374f2414-51f0-418f-a316-e7db0d6dc4d1 Bader, Dan 9884d4f6-2607-4d48-bf0c-62bdcc0d1dbf Moser, David 09874cab-348f-47f9-b018-1c2875d16998 Zahedi, S. 5b9f308c-b703-4a7a-a85a-03311c3419a1 Laszczak, Piotr, Mcgrath, Michael, Tang, Jing, Gao, Jianliang, Jiang, Liudi, Bader, Dan, Moser, David and Zahedi, S. (2016) A pressure and shear sensor system for stress measurement at lower limb residuum/socket interface. Medical Engineering & Physics, 38 (7), 695-700. (doi:10.1016/j.medengphy.2016.04.007). (PMID:27118308) Record type: Article Abstract A sensor system for measurement of pressure and shear at the lower limb residuum/socket interface is described. The system comprises of a flexible sensor unit and a data acquisition unit with wireless data transmission capability. Static and dynamic performance of the sensor system was characterised using a mechanical test machine. The static calibration results suggest that the developed sensor system presents high linearity (linearity error ~ 3.8%) and resolution (0.9kpa for pressure and 0.2kpa for shear). Dynamic characterisation of the sensor system shows hysteresis error of approximately 15% for pressure and 8% for shear. Subsequently, a pilot amputee walking test was conducted. Three sensors were placed at the residuum/socket interface of a knee disarticulation amputee and simultaneous measurements were obtained during pilot amputee walking test. The pressure and shear peak values as well as their temporal profiles are presented and discussed. In particular, peak pressure and shear of approximately 58kPa and 27kPa, respectively, were recorded. Their temporal profiles also provide dynamic coupling information at this critical residuum/socket interface. These preliminary amputee test results suggest strong potential of the developed sensor system for exploitation as an assistive technology to facilitate socket design, socket fit and effective monitoring of lower limb residuum health. Text Manuscript - accepted version.pdf - Accepted Manuscript Available under License Creative Commons Attribution Non-commercial No Derivatives. Download (4kB) More information Accepted/In Press date: 3 April 2016 e-pub ahead of print date: 23 April 2016 Published date: July 2016 Related URLs: https://doi.org/10.5258/SOTON/D0481 Keywords: pressure and shear sensor, residuum/socket interface, lower-limb amputees Organisations: Faculty of Health Sciences, Engineering Mats & Surface Engineerg Gp Learn more about Faculty of Health Sciences research Learn more about Institute for Life Sciences research Identifiers Local EPrints ID: 391352 URI: http://eprints.soton.ac.uk/id/eprint/391352 DOI: doi:10.1016/j.medengphy.2016.04.007 ISSN: 1350-4533 PURE UUID: db73001a-4e06-4ff4-8b5f-c9f114bf41b1 ORCID for Jing Tang: orcid.org/0000-0003-3359-5891 ORCID for Liudi Jiang: orcid.org/0000-0002-3400-825X ORCID for Dan Bader: orcid.org/0000-0002-1208-3507 Catalogue record Date deposited: 12 Apr 2016 08:54 Last modified: 10 Nov 2021 03:48 Export record ASCII CitationAtomBibTeXData Cite XMLDublin CoreDublin CoreEP3 XMLEndNoteHTML CitationHTML CitationHTML ListJSONMETSMODSMPEG-21 DIDLOpenURL ContextObjectOpenURL ContextObject in SpanRDF+N-TriplesRDF+N3RDF+XMLRIOXX2 XMLReferReference ManagerSimple Metadata Altmetrics Share this record Share this on FacebookShare this on Twitter Share this on Weibo Contributors Author: Piotr Laszczak Author: Michael Mcgrath Author: Jing Tang Author: Jianliang Gao Author: Liudi Jiang Author: Dan Bader Author: David Moser Author: S. 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