Measurement of the magnetic field in the near-field region and self-inductance in free space due to a multiturn square-loop

Author

Lou, E. ; Durdle, N.G. ; Raso, V.J. ; Hill, D.L.

Author_Institution

Dept. of Electr. Eng., Alberta Univ., Edmonton, Alta., Canada

Volume

144

Issue

6

fYear

1997

fDate

11/1/1997 12:00:00 AM

Firstpage

252

Lastpage

256

Abstract

A low-power electromagnetic multiturn square-loop transmitter-receiver system has been developed to measure the topographical features of a human torso. The paper presents a theoretical analysis of the magnetic field, and derives equations to calculate the self-inductance caused by a three axis orthogonal multiturn square-loop transmitter and receiver. The theoretical and experimental results of the magnetic field are compared at distances ranging from 8 to 26 cm. Results indicate that the strength of the magnetic field on the coaxial arrangement is double that for the coplanar arrangement. The errors of the results on all three axes are less than 1%. Measurement of the inductance shows that more accurate results are obtained for smaller sizes and for a greater number of turns of both transmitter and receiver

Keywords

biomedical equipment; biomedical measurement; digital multimeters; inductance; magnetic field measurement; receivers; surface topography measurement; transmitters; 8 to 26 cm; children; coaxial arrangement; coplanar arrangement; free space; human torso; inductance measurement; low-power electromagnetic multiturn square-loop transmitter-receiver system; magnetic field measurement; near-field region; self-inductance; spinal deformities; topographical features;

fLanguage

English

Journal_Title

Science, Measurement and Technology, IEE Proceedings -

Publisher

iet

ISSN

1350-2344

Type

jour

DOI

10.1049/ip-smt:19971549

Filename

640001