Publication detail

Noise Infuence of Magnetic Field to Conductivity Image Reconstruction

KŘÍŽ, T.

Original Title

Noise Infuence of Magnetic Field to Conductivity Image Reconstruction

English Title

Noise Infuence of Magnetic Field to Conductivity Image Reconstruction

Type

conference paper

Language

en

Original Abstract

The paper presents a conductivity calculation from values of the magnetic flux density measured outside the specimen. There is described the analysis of the noise influence that is presented in the measured values of a magnetic field. A conductivity calculation is based on the electrical impedance tomography (EIT) algorithm. The standard EIT exploited measured voltage values on electrodes placed at specimen boundaries to a conductivity calculation. The direct current source or the low frequency current source is connected to a specimen. A conductivity calculation is based on a minimizing of a suitable objective function. The least squares method is very often used for a minimization of an objective function. The Tikhonov regularization method is used in order to ensure the stability of an algorithm. The stability and the accuracy are dependent on an accuracy of measured voltage values.

English abstract

The paper presents a conductivity calculation from values of the magnetic flux density measured outside the specimen. There is described the analysis of the noise influence that is presented in the measured values of a magnetic field. A conductivity calculation is based on the electrical impedance tomography (EIT) algorithm. The standard EIT exploited measured voltage values on electrodes placed at specimen boundaries to a conductivity calculation. The direct current source or the low frequency current source is connected to a specimen. A conductivity calculation is based on a minimizing of a suitable objective function. The least squares method is very often used for a minimization of an objective function. The Tikhonov regularization method is used in order to ensure the stability of an algorithm. The stability and the accuracy are dependent on an accuracy of measured voltage values.

Keywords

EIT, magnetic field, conductivity reconstruction, noise influence

RIV year

2012

Released

30.08.2012

Publisher

The Electromagnetic Academy

Location

Cambridge

ISBN

978-1-934142-22-6

Book

Proceedings of PIERS 2012 MOSCOW

Pages from

271

Pages to

275

Pages count

5

BibTex


@inproceedings{BUT94742,
  author="Tomáš {Kříž}",
  title="Noise Infuence of Magnetic Field to Conductivity Image Reconstruction",
  annote="The paper presents a conductivity calculation from values of the magnetic flux
density measured outside the specimen. There is described the analysis of the noise influence that
is presented in the measured values of a magnetic field. A conductivity calculation is based on the
electrical impedance tomography (EIT) algorithm. The standard EIT exploited measured voltage
values on electrodes placed at specimen boundaries to a conductivity calculation. The direct
current source or the low frequency current source is connected to a specimen. A conductivity
calculation is based on a minimizing of a suitable objective function. The least squares method
is very often used for a minimization of an objective function. The Tikhonov regularization
method is used in order to ensure the stability of an algorithm. The stability and the accuracy
are dependent on an accuracy of measured voltage values.",
  address="The Electromagnetic Academy",
  booktitle="Proceedings of PIERS 2012 MOSCOW",
  chapter="94742",
  howpublished="electronic, physical medium",
  institution="The Electromagnetic Academy",
  year="2012",
  month="august",
  pages="271--275",
  publisher="The Electromagnetic Academy",
  type="conference paper"
}