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为满足轻气炮实验中对超高速小弹丸的测速需求,研制了一套激光片光测速系统.系统采用片光压缩技术、光谱滤光技术以及电路滤波和宽带放大技术,解决了超高速小弹丸测速成功率低和易受干扰的问题,测速信号具有较高的信噪比。在轻气炮实验中,该系统实现了对高速小弹丸的速度测量,与激光光束遮断法对比,测量结果的不一致性小于1%,系统的测量不确定度小于1%,可以满足轻气炮实验中对超高速小弹丸的测速需求。
In order to meet the need of speed measurement of ultra-high-speed small projectiles in light-gas gun experiment, a set of laser light velocity measuring system was developed.The system adopts the technology of optical compression, spectral filter and circuit filtering and broadband amplification to solve the problem of ultra-high speed small Projectile speed success rate is low and susceptible to interference, speed signal with high signal to noise ratio. In the light gas gun experiment, the system realizes the velocity measurement of the high-speed small projectile. Compared with the laser beam interruption method, the system has less than 1% of inconsistency and less than 1% of measurement uncertainty, which can meet the requirements of light gas gun In the experiment, the speed requirement of the ultra-fast small projectile was tested.