Simulation on Sensing Field of Electromagnetic Tomography Technology

X. Yixuan1, Z. Shu2, D. Feng1, 3

1. School of Electrical Engineering and Automation, Tianjin University, Tianjin, China

2. Institute of Biomedical Engineering, Chinese Academy Medical Science, Tianjin, China

3. Tianjin Key Laboratory of Process Measurement and Control, Tianjin, China Tel: 86-22-27890276, Fax: 86-22-27892055, Email: fdong@tju.edu.cn

ABSTRACT

Electromagnetic Tomography (EMT) which combined electromagnetic theory and computerized tomography technology is one of the electrical tomography technologies. This technology can reconstruct the spatiotemporal distributions of the electrically conductive and magnetically permeable materials by detecting the boundary magnetic induction of the researching space. The sensor of the EMT system has advantages of non-invasive, non-contacting and non-hazardous. So it has many potential applications in industrial fields, such as processing, foreign body detection in food processing, geologic exploration and multi-phase flow measurement. This paper studies the sensing field of EMT using the finite element (FEM) simulation, and the magnetic induction distribution of the empty field with this excitation model has been acquired. The influence of objects with different permeability, conductivity, and positions on the excitation sensing field was analyzed.

Keywords Electromagnetic tomography; Simulation; Forward problem; Sensing field