弹丸出炮口时间测试方法研究

为了用实验测试方法准确得到弹丸出炮口时间参数，以小口径火炮为实验对象，采用高速摄影法、靶丝通断法、光电法和后坐位移法等4种方法，开展弹丸出炮口时刻的时间参数测试方法研究。用4种方法同时测试同一弹丸出炮口时间，用同一台数据采集系统采集4种信号，以高速摄影法得到的时间曲线为时间基准，将4种时间信号统一到相同时间坐标中。高速摄影法测试最直接、数据最可靠。通断靶丝是被高速燃气流吹断的，而不是被弹头碰断的。先于弹丸泄露的火药气体使光电传感器提前触发。

Measurement Methods for Muzzle-leaving Time of Projectile

In order to obtain the muzzle-leaving time of projectile accurately,a small caliber gun was taken as tested object,and four methods,such as high-speed photography,on-off target,photoelectric and recoil displacement methods were simultaneously used for the same projectile and a data acquisition system was used to acquire four signals,in order to search the best measurement method.Taken the result obtained by high-speed photography as time benchmark,four signals were unified in the same time coordinate.The results show that the high-speed photography is a direct and reliable method,on-off target is broken by high-speed burning gas flow before the projectile,and the powder gas triggers the photoelectric sensor earlier.