基于改进Laplace小波时延提取的声源定位方法

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (9) : 175-185.

论文

宁方立，段少东，李晶，霍家辉

作者信息 +

Sound source localization method based on improved Laplace wavelet time delay extraction

NING Fangli, DUAN Shaodong, LI Jing, HUO Jiahui

Author information +

文章历史 +

摘要

针对侵彻弹命中多层硬目标后产生的撞击声的定位问题，提出了一种基于改进Laplace(refined Laplace, R-Laplace)小波时延提取的声源定位方法。该方法通过先验信息处理构造出Laplace小波，与声信号进行相关系数计算得到时延信息，并结合搜索匹配算法求得多次撞击的声源位置。搭建了声源采集定位系统，并进行多次硬目标撞击声试验。外场试验结果表明：可以定位出4层撞击的声源位置，定位误差平均为0.3米。相较于传统基于到达时间差(time difference of arrival, TDOA)的定位算法定位精度较高。该算法在基于到达时间差声源定位问题中具有较大的应用潜力，对实际应用中的声源定位问题具有重要意义。

Abstract

An acoustic source localization method based on refined Laplace (R-Laplace) wavelet time delay extraction is proposed to solve the localization problem of impact sound generated by penetrating projectiles hitting multi-layer hard targets. This method constructs Laplace wavelet through prior information processing, calculates the correlation coefficient with the acoustic signal to obtain the time delay information, and combines the search matching algorithm to obtain the sound source position of multiple impacts. The sound source acquisition and positioning system was built, and several hard target impact sound tests were carried out. The outdoor experimental results show that compared with the traditional location algorithm based on time difference of arrival (TDOA), this method can accurately locate 4 sound sources on different impacted layers. The average positioning error is 0.3 m, which proves that the algorithm has a large potential for application in sound source localization problems based on time difference of arrival and is important for practical applications of sound source localization problems.

导出引用

宁方立，段少东，李晶，霍家辉. 基于改进Laplace小波时延提取的声源定位方法[J]. 振动与冲击, 2024, 43(9): 175-185

NING Fangli, DUAN Shaodong, LI Jing, HUO Jiahui. Sound source localization method based on improved Laplace wavelet time delay extraction[J]. Journal of Vibration and Shock, 2024, 43(9): 175-185

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