Magnetic polarizability tensors for low frequency object classification and detection

Ledger, P. D.; Lionheart, W. R. B.

Abstract

There is considerable interest in obtaining a low-cost mathematical description, which describes the interaction between a low frequency alternating magnetic field and a conducting object. Electrical engineers have proposed that the voltage perturbation in a coil placed in the field can be described in terms of a tensor that characterises its shape and material properties. In previous work [4], [6], we have obtained an explicit expression for the tensor's computation. This presentation extends on this to include a Bayesian inverse solution for the tensor coefficients of different objects. This has important applications in metal detectors for landmine clearance and airport security.

Citation

Ledger, P. D., & Lionheart, W. R. B. (2017, March). Magnetic polarizability tensors for low frequency object classification and detection. Paper presented at 2017 International Applied Computational Electromagnetics Society Symposium - Italy (ACES), Florence

• Presentation Conference Type: Conference Paper (unpublished)
• Conference Name: 2017 International Applied Computational Electromagnetics Society Symposium - Italy (ACES)
• Conference Location: Florence
• Start Date: Mar 26, 2017
• End Date: Mar 30, 2017
• Publication Date: 2017-03
• Deposit Date: Jun 12, 2023
• DOI: https://doi.org/10.23919/ropaces.2017.7916352