利用仰角信息降低直升机声目标检测虚警率

对直升机声目标的检测是低空管制的一项重要内容。利用谐波特征识别直升机声信号往往受到地面噪声的影响,系统的虚警率高。不同的声源目标有着不同的空间位置,依据这一特性,文中提出一种利用仰角信息和谐波特征综合判断的方法来检测直升机声目标。实验的对比结果表明了该方法的有效性和可行性,系统的虚警率从18.29%降到了4.88%。最后在LabVIEW环境下,设计出声探测技术实验平台用于直升机声目标的检测,实现了软件和硬件的结合。平台的界面友好,操作简单,实用性较好。

Using Elevation Angle Information to Reduce the False Alarm Rate of Helicopter Acoustic Target Detection

The detection of helicopter acoustic target is an essential part of low-altitude control.The recognition of helicopter acoustic signal by using harmonic features is often affected by ground noise,so the false alarm rate of system is high.According to the characteristic that different sound goals have different space positions,this article proposes an integrated approach to detect helicopter acoustic target by using elevation angle information and harmonic features.The comparison of experiment results demons...