TY - JOUR

T1 - Electromagnetic inductance tomography (EMT): sensor, electronics and image reconstruction for a system with a rotatable parallel excitation.

AU - Yu, Z. Z.

AU - Peyton, A. J.

AU - Xu, L. A.

AU - Beck, M. S.

N1 - "©1998 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE." "This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder."

PY - 1998

Y1 - 1998

N2 - The main features and principle of operation of an electromagnetic inductance tomography system are described. The system can image the distribution of electrically conducting and/or magnetically permeable materials and is analogous to the other electrical tomography systems which measure capacitance or resistance. The paper presents a nonintrusive system with a rotatable parallel uniform excitation magnetic field which improves the detectability at the centre of the object space with respect to that near the periphery. The sensor construction, electronics design and image reconstruction are described. A novel electronic compensation scheme is used to condition the output signals from the sensor. This scheme subtracts the empty space background field measurements and consequently increases the overall dynamic range of the data acquisition system. An image reconstruction technique based on a correlation method is described and some images are presented.

AB - The main features and principle of operation of an electromagnetic inductance tomography system are described. The system can image the distribution of electrically conducting and/or magnetically permeable materials and is analogous to the other electrical tomography systems which measure capacitance or resistance. The paper presents a nonintrusive system with a rotatable parallel uniform excitation magnetic field which improves the detectability at the centre of the object space with respect to that near the periphery. The sensor construction, electronics design and image reconstruction are described. A novel electronic compensation scheme is used to condition the output signals from the sensor. This scheme subtracts the empty space background field measurements and consequently increases the overall dynamic range of the data acquisition system. An image reconstruction technique based on a correlation method is described and some images are presented.

M3 - Journal article

VL - 145

SP - 20

EP - 25

JO - IEE Proceedings Science Measurement and Technology

JF - IEE Proceedings Science Measurement and Technology

IS - 1

ER -