基于激光干涉技术的弹丸瞬时速度测量的研究

Research on projectile instantaneous velocity measurement based on laser interferometry

为研究枪械弹丸在出膛瞬间的速度变化规律,引入了激光干涉测速技术与脊线提取修正算法,解决这种强干扰的特殊环境下并伴有速度激变的速度测量问题。在实际实验中用直径12.7 mm的贴有原向返射膜的平头弹进行多次实验,将实验结果进行了详细计算与分析,并与现有全光纤激光干涉测速仪(all fiber displacement interferometer systemfor any reflector,AFDISAR)测速系统进行了比较与分析。结果表明,试验测试的方案可行,对采集到的激光干涉信号经过处理和计算可得到更为平稳的速度曲线,成功解决了枪械弹丸在出膛瞬间的速度变化规律的测量。

In order to study the velocity variation law of gun projectile at the moment of exit,the laser interferometric velocity measurement technology and ridge extraction correction algorithm are introduced to solve the velocity measurement problem accompanied by velocity turbulence in this special environment with strong interference.In the actual experiment,many experiments are carried out with a flat head projectile with a diameter of 12.7 mm and pasted with a retroreflective film.The experimental results are calculated and analyzed in detail,and compared with the existing AFDISAR velocity measurement system.The results show that the test scheme is feasible,the collected laser interference signal can be processed and calculated to obtain a more stable velocity curve,and the measurement of the velocity change law of gun projectile at the moment of exit is successfully solved.