Direct mechanical landmine excitation with scanner laser Doppler vibrometer surface measurements

S. Bishop; J. Vignola; J. Judge; P. Tsopelas; A. Kurdila

doi:10.1117/12.721512

7 May 2007 Direct mechanical landmine excitation with scanner laser Doppler vibrometer surface measurements

S. Bishop, J. Vignola, J. Judge, P. Tsopelas, A. Kurdila

Proceedings Volume 6553, Detection and Remediation Technologies for Mines and Minelike Targets XII; 655304 (2007) https://doi.org/10.1117/12.721512
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

Remote acoustic or seismic forms of excitation for laser Doppler vibration landmine detection are low false alarm rate detection strategies. A more recent approach now under investigation includes a direct mechanical excitation through a prodder or probe. In this research, we report on simple laboratory measurements of the VS-1.6 landmine undergoing direct mechanical excitation from a modified prodder while measuring the landmine's pressure plate vibrational response with a scanning laser Doppler vibrometer. The direct mechanical excitation mechanism, located near the prodding end of a rod, consists of a miniature piezoelectric stack actuator. We additionally compare direct excitation to both acoustic and seismic methods in a large sandbox filled with dry sand. We show that for the landmine buried almost flush, direct contact mechanical excitation compares favorably to both seismic and acoustic excitation responses for the (0,1) mode of the pressure plate. We also observe additional features not previously seen in either seismic or acoustic excitation.

Citation Download Citation

S. Bishop, J. Vignola, J. Judge, P. Tsopelas, and A. Kurdila "Direct mechanical landmine excitation with scanner laser Doppler vibrometer surface measurements", Proc. SPIE 6553, Detection and Remediation Technologies for Mines and Minelike Targets XII, 655304 (7 May 2007); https://doi.org/10.1117/12.721512

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