【摘要】 根据声-地震耦合原理,分析地震波与地雷的机械作用,并设计一个基于地震检波器串的探雷实验系统。把高顺性雷体与其上方的土壤视作一个质量-弹簧系统,用解析法分析其谐振机理。采用扬声器发出可扫频的单音正弦波穿透到地下土壤,作为系统信号激励源,采用地震检波器串测出地表震动速度。根据有无地雷处的地表震动速度幅频特性曲线,分析地雷对地表震动的影响。实验结果显示,地雷上方的地表震动速度要明显高于没有地雷的情况,该系统可用于声波探雷的进一步研究。更多还原

【Abstract】 The mechanical interaction between the induced seismic waves and landmines was analyzed according to acoustic-to-seismic coupling theory.And a geophone array based experimental system for landmine detection was developed.By modeling a compliant mine and the soil on top of it as a mass-spring system,analytic method was adopted to study the resonance mechanism of the system.A loudspeaker was employed as energy source to insonify a swept sine tone over the soil.We also used a geophone array to measure the vibration velocity of the ground surface. In order to analysis the landmine effect on the surface vibration,the magnitude spectra curves of the measured velocity values on-and-off mines were plotted.The results showed that the data measured on mine is much bigger than that off target and the proposed system can be applied to further investigation of acoustic landmines detection.更多还原