二级轻气炮弹丸速度过程测量实验技术研究

 针对二级轻气炮发射管的特性，设计了测量景深长达13 m的光纤探头，选择条纹常数为100 m/s的高灵敏度激光干涉测速仪，结合任意反射面激光干涉测速技术进行了实验，测量了发射口径Φ32 mm、长度12 m的二级轻气炮弹丸发射过程，测得弹丸运动距离11.3 m时的速度为3 960 m/s，与磁测速的结果一致，通过实验测得的速度历史，进而获得弹丸在发射管内的加速度过程，为炮内弹道研究提供了更直接的实验数据。

Motion History Measurement of Projectile Launched by a Two-Stage Light Gas Gun

The work was done for the research of interior ballistic. A wide range fiber probe (depth of field is 13 m) was designed for measuring the motion history of projectile launched by a Φ32 mm two-stage light gas gun. The projectile velocity was measured by using a VISAR with velocity per fringe 100 m/s. The obtained result shows the projectile reaches a velocity of 3 960 m/s at the distance of 11.3 m, which is well consistent with the result from the magnetic measurement. The acceleration history of projectile was also obtained by differentiating the velocity profile. This work proved that the VISAR can been used in the interior ballistic research.