Abstract
Resonance behavior of many types of landmines was first experimentally discovered in 2000 (Donskoy et cd. in Proceedings of SPIE Vol. 4394, pp. 575-582, 2001). Laboratory studies and field tests have shown that mine's resonance response is a complex phenomenon dependent upon interaction between soil and mines and their respective properties. Although the resonance effect was successfully used by various research teams for detection of landmines, there were no thorough studies on various factors influencing buried mine's resonance response. This paper presents results of theoretical and experimental investigation of this problem including multi-modal structure of mine's vibration response, effect of burial depth and soil condition. In the modeling efforts we considered multiple modes of vibration of mine casing and represented them as oscillators with effective parameters. This approach allowed for simplification of analysis and expanding existing lump-element model to account for multiple vibration modes. The experimental tests were focused on studying the effects of burial depth and soil moisture content on resonance behavior of soil-mine system. The tests have shown that a resonance frequency initially decreases with burial depth, as expected. However, an anomalous resonance frequency increase was observed at greater depths; soil moisture even further increases the resonance frequency.
Original language | English |
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Pages (from-to) | 21-29 |
Number of pages | 9 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 5415 |
Issue number | PART 1 |
DOIs | |
State | Published - 2004 |
Event | Detection and Remediation Technologies for Mines and Minelike Targets IX - Orlando, FL, United States Duration: 12 Apr 2004 → 16 Apr 2004 |
Keywords
- Land mine detection
- Mechanical impedance
- Resonance vibrations
- Vibration modes