Contact-Free Magnetoelastic Smart Microsensors With Stochastic Noise Filtering for Diagnosing Orthopedic Implant Failures

Author

Mouzakis, Dionysios E. ; Dimogianopoulos, Dimitrios ; Giannikas, Dimitrios

Author_Institution

Dept. of Mater. Sci., Univ. of Patras, Patras

Volume

56

Issue

4

fYear

2009

fDate

4/1/2009 12:00:00 AM

Firstpage

1092

Lastpage

1100

Abstract

A novel contact-free magnetoelastic microsensor for diagnosing failing orthopedic implants is introduced. It uses an implant-embedded 30-mum-thick MetGlas-2826 film and a sensing coil placed 30 mm away from the film. Implant loading generates thin-film magnetoelastic response, passively (contact-free) detected as voltage by the coil. A specific integrated stochastic nonlinear filter performs data denoising, and a decision-making module concludes (via data assessment) on the health state of the implants. The sensor is successfully validated in vitro on an external fixation system and a hip prosthesis implant, respectively.

Keywords

biomedical equipment; intelligent sensors; microsensors; orthopaedics; patient diagnosis; prosthetics; MetGlas-2826 film; contact-free magnetoelastic smart microsensors; data denoising; decision-making module; distance 30 mm; external fixation system; hip prosthesis implant; integrated stochastic nonlinear filter; orthopedic implant failures; patient diagnosis; sensing coil; size 30 mum; stochastic noise filtering; thin-film magnetoelastic response; Magnetoelasticity; medical/damage diagnosis; microelectromechanical sensors; stochastic nonlinear filtering;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2008.2007548

Filename

4663826