Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/26954

TitlePiezoresistive sensors for force mapping of hip-prostheses
Author(s)Correia, Vítor
Sencadas, Vítor João Gomes Silva
Martins, M.
Ribeiro, C.
Alpuim, P.
Rocha, J. G.
Morales, I.
Atienza, C.
Lanceros-Méndez, S.
KeywordsPiezoresistive poly-Si
Prosthesis monitoring
Stress mapping
Low temperature poly-Si
Nanocrystalline Si
Issue date2013
PublisherElsevier
JournalSensors and Actuators
Abstract(s)The success of artificial prosthetic replacements depends on the fixation of the artificial prosthetic component after being implanted in the thighbone. This work shows a smart prosthesis based on highly sensitive silicon thin-film piezoresistive sensors attached to a hip prosthesis. The performance of the sensors for this application is studied and compared to commercial strain gauge sensors. Mechanical stress-strain experiments were performed in compressive mode, during 10,000 cycles and data was acquired at mechanical vibration frequencies of 0.5 Hz, 1 Hz and 5 Hz, and sent to a computer by means of a wireless link. The results show that there is a decrease in sensitivity of the thin-film silicon piezoresistive (n-type nanocrystalline Si) sensors when they are attached to the prosthesis, however this decrease does not compromise its monitoring performance. The sensitivity, compared to that of commercial strain gauges, is much larger due to their higher gauge factor (-23.5), when compared to the gage factor of commercial sensors (2).
TypeArticle
URIhttp://hdl.handle.net/1822/26954
DOI10.1016/j.sna.2013.03.013
ISSN0924-4247
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)

Files in This Item:
File Description SizeFormat 
Smart_Prostheses_F.pdf
  Restricted access
943,77 kBAdobe PDFView/Open    Request a copy!

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID