Detecting fractures in thin-wire structures

Author

Lepelaars, E.S.A.M. ; Ooijen, Willem D R Van ; Tijhuis, Anton G. ; de Moi, B.A.J.M.

Author_Institution

Fac. of Electr. Eng., Eindhoven Univ. of Technol., Netherlands

Volume

1

fYear

1996

fDate

31 Oct-3 Nov 1996

Firstpage

159

Abstract

The possibility of detecting mechanical defects in certain types of heart valves by pulsed electromagnetic waves is studied by investigating a simplified model configuration via computational simulations. The model consists of a circular thin wire with an impedance load embedded in a homogeneous, dispersive dielectric, excited by a delta-gap voltage or an external dipole source. An integral equation for the total current along the wire is formulated and solved numerically. The results indicate that, for a suitable excitation, the presence of a defect may have a significant effect on the late-time decay rate of this current

Keywords

biomechanics; biomedical equipment; cardiology; crack detection; electric impedance; physiological models; prosthetics; circular thin wire; computational simulation; delta-gap voltage; external dipole source; fractures detection; heart valves; homogeneous dispersive dielectric; impedance load; integral equation; late-time decay rate; magnetic dipole; mechanical defects; pulsed electromagnetic waves; simplified model configuration; thin-wire structures; total current; Computational modeling; Dielectrics; Dispersion; EMP radiation effects; Electromagnetic modeling; Electromagnetic scattering; Heart valves; Impedance; Voltage; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE

Conference_Location

Amsterdam

Print_ISBN

0-7803-3811-1

Type

conf

DOI

10.1109/IEMBS.1996.656895

Filename

656895