线激光散斑检测弹幕武器炮口振动测量方法

为了解决在弹幕武器射击时的恶劣环境下，频域分布复杂的炮口振动信号测试难题，采用线激光散斑场光电检测方法，研究了振动信号与输出电流数学关系，分析了基于雪崩光电二极管的光电检测电路噪声与幅频特性，提出了一种基于身管表面线激光散斑效应的炮口振动测量的方法，并进行了25m远处的振幅在微米级、频率为50Hz~16kHz振动信号的检测实验。结果表明，线激光散斑检测炮口振动振幅在微米量级。该测量方法具有频率响应范围宽、测量距离远、灵敏度高等优点，实现了远距离、宽频域振动信号的检测。

Method for measuring muzzle vibration of barrage weapons based on line laser speckle detection

In order to solve the testing problem of muzzle vibration signal with complex frequency distribution under the abominable circumstances with the shooting of barrage weapons , the photoelectric detection method based on line laser speckle field was used.The mathematical relationship between the vibration signal and output current was studied , and the noise and amplitude frequency characteristics of photoelectric detection circuit based on avalanche photo diode were analyzed.A method of muzzle vibration measurement based on laser speckle effect of barrel surface was proposed.The detection experiment of vibration signal was carried out at distance of 25m, with amplitude of micron magnitude and frequency of 50Hz~16kHz.The results show that, the vibration amplitude of gun muzzle is μm magnitude.The measurement method has advantages of wide frequency response range , long measurement distance and high sensitivity.Vibration signal detection at long distance and wide frequency range is realized.