L1模解卷方法的有效性及其在地下目标声学探测中的应用研究

Research of the validity of L_1 norm deconvolution and its application in acoustic detection of buried objects

L1模解卷方法是提高声学探测系统时间分辨率的一种常用方法。为了评估该方法在地下目标声学探测中的有效性及极限性能,定义了一系列评价指标,对其进行了仿真和实际应用分析。研究发现,L1模解卷方法只在目标函数加权系数的一定取值范围内有效,并且存在最优值,其最佳效果取决于输出信号的信噪比。同时,针对实际探测系统,论文给出了一种优选加权系数的方法。应用表明,该方法是行之有效的。

L1 norm deconvolution technique is widely used to improve temporal resolution in acoustic detection of buried objects. However, it is little known how to ensure its effectiveness and efficiency. In this paper, a series of criteria are introduced for evaluating the validity of L1 norm deconvolution by simulation and application analysis. It is shown that the technique is valid only in a limited range of the parameter A 1, which is the weight of objective function, and has an optimal valuel And the highest resolution is determined by the SNR （signal-to-noise ratio） of the output signal. A method for choosing the optimal value of the weight is proposed based on the practical data obtained from detecting objects buried in sand with good results.