片光反射遮挡式超高速亚毫米粒子探测技术

为满足在超高速碰撞靶上开展航天器抗空间碎片防护性能试验，需要准确测量速度3～10km／s，以及更高速度的毫米级或亚毫米级粒子的飞行速度，在可以实现毫米级粒子探测的片光遮挡式粒子探测技术基础上发展了片光反射遮挡式粒子探测技术，通过采用提高粒子直径与激光光束宽度的比值，解决了探测粒子直径小于1mm时探测信号弱不能识别等关键技术，研制了试验装置并开展了验证试验，研究结果表明该技术在0．2～10km／s速度范围内可实现直径为0．1mm量级粒子的有效探测。

Research of hypervelocity particle detect technology by multi-reflect sheet laser

The multi-reflect flake light particle detecting technology was developed based on the single flake light particle detecting technology to measure the particle velocity exactly in hy- pervelocity impact tests that were usually carried out for space debris research. The key problem of detecting particles with diameter less than lmm was to increase the intensity of detect signal. It could be resolved by increasing the ratio of the particle diameter to the flake light width. A velocity measure system involving the new technology was developed and installed at the ballistic ranges. A series of tests have been carried out to validate the effect of the new device. The test results show that the small particles with diameter down to 0.1mm can be detected in effect.