连发弹丸爆炸声信号时延估计技术研究

Research on Time Delay Estimation Technology of Continuous Projectile Explosion Acoustic Signal

摘要:

根据声测连发地面炸点技术研究课题的需求，分析了复杂背景下连发弹丸爆炸声信号的特点，研究了一套适用于靶场实际测量环境的多目标信号时延估计技术，主要步骤为信号预处理、目标识别和时延提取。计算机模拟仿真结果表明，算法的时延估计精度可达到1.2毫秒，并可正确分离间隔大于半个信号主脉宽（约10毫秒）的粘连信号。利用课题组自行研制的原理样机采集了实弹射击的声信号，试验处理结果验证了算法的可靠性与正确性，且时延估计误差与数值仿真一致，较好地解决了连发地面炸点目标声学定位中的时延估计问题。

Abstract:

Based on the requirements of the research topic of using sound signals to measure continuous ground fried point technology, the paper analyzes the characteristics of continuous projectile burst acoustic signals in complex background, and studies a multi-target signal delay estimation technique suitable for the actual measurement environment of the shooting range. The main steps are signal preprocessing, target recognition and time delay extraction. The computer simulation shows that the delay estimation accuracy of the algorithm can reach 1.2 milliseconds, and the adhesion signals with interval greater than main pulse width (about 10 milliseconds) can be correctly separated. The acoustic signals of the live projectile were collected by using the prototype developed by the research team, the test results verify the reliability and correctness of the algorithm, and the delay estimation error is consistent with the numerical simulation, which better solves the continuous ground-fired target time delay estimation problem in acoustic localization.