Theoretical and experimental analysis of an equivalent circuit model for the investigation of shallow landmines with acoustic methods

G. Borgioli; A. Bulletti; M. Calzolai; L. Capineri; P. Falorni; L. Masotti; S. Valentini; C. Windsor

doi:10.1117/12.746394

7 November 2007 Theoretical and experimental analysis of an equivalent circuit model for the investigation of shallow landmines with acoustic methods

G. Borgioli, A. Bulletti, M. Calzolai, L. Capineri, P. Falorni, L. Masotti, S. Valentini, C. Windsor

Author Affiliations +

Proceedings Volume 6739, Electro-Optical Remote Sensing, Detection, and Photonic Technologies and Their Applications; 673907 (2007) https://doi.org/10.1117/12.746394
Event: Optics/Photonics in Security and Defence, 2007, Florence, Italy

Abstract

Acoustic methods have been recently investigated for the detection of shallow landmines. Some plastic landmines have a flexible case which can made to vibrate by an airborne excitation like a loudspeaker. The soil-mine system shows a resonant behavior which is used as a signature to discriminate from other rigid objects. The mechanical resonance can be detected at the soil surface by a remote sensing systems like a laser interferometer. An equivalent physical model of the mine-soil system has been investigated having the known physical characteristics of mine simulants. The authors designed and built a test-object with known mechanical characteristics (mass, elasticity, damping factor). The model has been characterized in laboratory and the results compared with the classic mass-spring loss oscillator described by Voigt. The vibrations at the soil surface have been measured in various positions with a micro machined accelerometer. The results of the simulations for the acceleration of the soil-mine system agree well with the experiment. The calibrated mine model is useful to investigate the variation of the resonance frequency for various buried depths and to compare the results for different soils in different environmental conditions.

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G. Borgioli, A. Bulletti, M. Calzolai, L. Capineri, P. Falorni, L. Masotti, S. Valentini, and C. Windsor "Theoretical and experimental analysis of an equivalent circuit model for the investigation of shallow landmines with acoustic methods", Proc. SPIE 6739, Electro-Optical Remote Sensing, Detection, and Photonic Technologies and Their Applications, 673907 (7 November 2007); https://doi.org/10.1117/12.746394

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