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Proceedings Paper

Performance assessment of an electrical impedance tomography detector for minelike objects
Author(s): Philip M. Church; Philip M. Wort; Stephane Gagnon; John E. McFee
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Paper Abstract

This paper reports the results of the performance assessment of an Electrical Impedance Tomography detector (EIT) for mine-like objects in soils. EIT uses an array of electrodes to inject low frequency currents in the soil and measure the resulting electrical potentials. The measurements are then used to reconstruct the electrical conductivity perturbations underneath the array. In the course of this work, an EIT instrument was built and field evaluated. The array is made of 64 stainless steel stimulating and recording electrodes arranged in an 8x8 grid. Specialized electronics has been built to control the electrode current stimulations and potential measurements. The detection algorithm is tuned to objects of a given size and shape to reduce the false alarm rate. The main mechanical, electronic and algorithm components of the detector will be presented. The EIT detector was originally designed in view of evaluating its potential as a confirmatory detector of AT mines. To that end, mine-like objects representative of some AT mines were used. Results of preliminary field evaluations are presented. The detection capabilities and limitations of mine-like objects are discussed.

Paper Details

Date Published: 18 October 2001
PDF: 12 pages
Proc. SPIE 4394, Detection and Remediation Technologies for Mines and Minelike Targets VI, (18 October 2001); doi: 10.1117/12.445463
Show Author Affiliations
Philip M. Church, Neptec Design Group (Canada)
Philip M. Wort, Zenastra Photonics (Canada)
Stephane Gagnon, PMC Sierra, Inc. (Canada)
John E. McFee, Defence Research Establishment Suffield (Canada)

Published in SPIE Proceedings Vol. 4394:
Detection and Remediation Technologies for Mines and Minelike Targets VI
Abinash C. Dubey; James F. Harvey; J. Thomas Broach; Vivian George, Editor(s)

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