Acoustic Impedance and Its Application in Seismo-Acoustic Landmines Detection Models

Abstract

Li, H.; Wang, Y.; Chang, H.; Xiao, W.; Yu, Z., and Guo, S., 2020. Acoustic impedance and its application in seismo-acoustic landmines detection models. In: Zheng, C.W.; Wang, Q.; Zhan, C., and Yang, S.B. (eds.), Air-Sea Interaction and Coastal Environments of the Maritime and Polar Silk Roads.Journal of Coastal Research, Special Issue No. 99, pp. 92-98. Coconut Creek (Florida), ISSN 0749-0208.Acoustic-to-seismic (A/S) coupling method has been demonstrated to be an effective and accurate technique for the detection of non-metallic landmines buried in soils. However, the complexity and diversity of landed zones in different countries or areas make it difficult to design a practical landmine detection system used in different landed zones. Buried non-metallic mines induce very complex vibration characteristics, which depends on interaction between the soil and the mines as well as on their respective properties. Acoustic impedance is a simple and efficient parameter that can be used to describe A/S coupling and buried non-metallic mines impact on the coupling efficiency. In this paper, theoretical studies will be overviewed including the linear resonance, the non-linear resonance and the anti-resonance models. Relationships will be also discussed between the ground surface acoustic impedance and the buried mines. Finally, frequency response transfer function is proposed to study and summarize dynamics of the soil-mine resonance system.