Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (12): 3006-3014.doi: 10.13229/j.cnki.jdxbgxb20210456

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Analysis of acoustic⁃to⁃seismic coupling landmine detection technology based on parametric acoustic array

Chi WANG1,2(),Xin-yu LUO1,Chao WANG1,He-jun JIANG2,Chao-peng LUO2()   

  1. 1.School of Mechatronic Engineering and Automation，Shanghai University，Shanghai 200444，China
    2.Science and Technology on Near-surface Detection Laboratory，Wuxi 214035，China
  • Received:2021-05-24 Online:2022-12-01 Published:2022-12-08
  • Contact: Chao-peng LUO E-mail:wangchi@shu.edu.cn;chaopengluo59103@163.com

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Abstract:

The acoustic-to-seismic coupling landmine detection system based on a parametric acoustic array was constructed to study the application method of the parametric acoustic array in acoustic landmine detection technology. Based on the theory of acoustic-to-seismic coupling landmine detection， the parametric acoustic array was used as an acoustic energy source to excite the surface vibration which can be detected by an accelerometer. The three-dimensional characteristic maps of surface vibration under different types of landmines and buried soil conditions were constructed. The experimental results show that the acoustic-to-seismic coupling efficiency of the soil above the landmine is obviously better than that of the bricks and other disturbances， and it is affected by the type of the landmine and the surrounding soil conditions， which indicates that the parametric acoustic array can be used for further research on the development of acoustic landmine detection engineering system.

Key words: precision instrument and machinery, acoustic landmine detection, parametric acoustic array, acoustic-to-seismic coupling, nonmetallic landmine

CLC Number: 

  • TB51

Fig.1

Schematic diagram of nonlinear effects of sound waves"

Fig.2

Schematic diagram of acoustic-to-seismic coupling and landmine resonance"

Fig.3

Schematic diagram of acoustic-to-seismic coupling landmine detection system"

Fig.4

Acoustic-to-seismic coupling landmine detection experimental system"

Fig.5

Experimental results at burial depth of 2 cm"

Fig.6

Schematic diagram of grid division of experimental area"

Fig.7

Surface vibration scanning detection results with buried depth of 2 cm"

Fig.8

Surface vibration detection results with different buried depth"

Fig.9

Surface vibration detection results with different soil porosity"

Fig.10

Surface vibration detection results with different soil moisture"

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