Effect of the soil on the metal detector signature of a buried mine

Pascal Druyts; Yogadhish Das; Christophe Craeye; Marc Acheroy

doi:10.1117/12.666954

17 May 2006 Effect of the soil on the metal detector signature of a buried mine

Pascal Druyts, Yogadhish Das, Christophe Craeye, Marc Acheroy

Proceedings Volume 6217, Detection and Remediation Technologies for Mines and Minelike Targets XI; 62170Q (2006) https://doi.org/10.1117/12.666954
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

This paper analyzes the effect of the soil on the response of a metal detector (MD). The total response is first decomposed in a direct coupling between the transmitter and the receiver, the mine contribution and the soil contribution. The mine contribution is further related to its free space signature by introducting a number of transfer functions (TFs). Those TFs characterize the effect of the soil on the field propagation, from the transmit coil to the mine and back to the receiver, and on the mine signature. The expressions derived are quite general. However the TFs and other quantities of interest can only be computed if the scattering problem has been solved. For this it is usually necessary to resort to numerical techniques. Such techniques are computationally expensive, especially to analyze the various effects of the soil as they require to compute the solution for a large set of parameters. Therefore, we propose to model a buried mine by a multilayered sphere. From outside to inside, the layers represent the air, the soil, the mine explosive and the mine metallic content. Further, the analytic solution for such a multilayered sphere is used to compute the mine and soil responses, the mine free space signature and the various TFs as a function of the parameters of interest such as the soil electromagnetic (EM) properties or the mine depth. Finally, the validity domain of a number of practical approximations is discussed.

Citation Download Citation

Pascal Druyts, Yogadhish Das, Christophe Craeye, and Marc Acheroy "Effect of the soil on the metal detector signature of a buried mine", Proc. SPIE 6217, Detection and Remediation Technologies for Mines and Minelike Targets XI, 62170Q (17 May 2006); https://doi.org/10.1117/12.666954

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available