基于炮口脉冲噪声信号的射速测试方法研究

Research on Testing Firing Rate Based on Muzzle Impulse Noise

根据炮口脉冲噪声与发射弹序相一致的特性,提出了从脉冲噪声测试曲线中提取弹丸发射速度的非接触式测试方法。通过采用小波分解对火炮脉冲噪声测试曲线进行分析,自动识别弹序和计算射击速度;通过仿真3种典型单发炮口脉冲噪声信号,分析了测试最大射速及其影响因素;对某自动步枪射击实验进行了分析,研究了测试位置对测试结果的影响。仿真和试验表明,本方法可获取火炮真实射速,测试射速能达到10 000发/min以上,具有判别准确率高、操作方便等特点。

According to the same periodicity between the muzzle impulse noise and the firing sequence, a new non-contact method which tests the firing rate based on the muzzle impulse noise is put forward. Firstly, the wavelet decomposition method is used in analyzing the test curve of the muzzle impulse noise to automatically obtain the number of fired bullets, firing intervals and firing rate and the algorithms. Secondly, the factors which influence the test for maximum rate of fire are analyzed by simulating three typical noise signals of single bullet. Finally, the effect of test position on test result is studied by means of firing experiment of an automatic rifle. The simulated and experimental results show that the method can test the firing rate of more than 10 000 bullets per minute with high accuracy.