6 October 2017 Magnetic induction tomography of objects for security applications
Author Affiliations +
Abstract
A coil array imaging system has been further developed from previous investigations, focusing on designing its application for fast screening of small bags or parcels, with a view to the production of a compact instrument for security applications. In addition to reducing image acquisition times, work was directed toward exploring potential cost effective manufacturing routes. Based on magnetic induction tomography and eddy-current principles, the instrument captured images of conductive targets using a lock-in amplifier, individually multiplexing signals between a primary driver coil and a 20 by 21 imaging array of secondary passive coils constructed using a reproducible multiple tile design. The design was based on additive manufacturing techniques and provided 2 orthogonal imaging planes with an ability to reconstruct images in less than 10 seconds. An assessment of one of the imaging planes is presented. This technique potentially provides a cost effective threat evaluation technique that may compliment conventional radiographic approaches.
Conference Presentation
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Rob Ward, Rob Ward, Max Joseph, Max Joseph, Abbi Langley, Abbi Langley, Stuart Taylor, Stuart Taylor, Joe C. Watson, Joe C. Watson, } "Magnetic induction tomography of objects for security applications", Proc. SPIE 10438, Emerging Imaging and Sensing Technologies for Security and Defence II, 104380G (6 October 2017); doi: 10.1117/12.2278888; https://doi.org/10.1117/12.2278888
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