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.%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.
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