一种非接触式微小飞片速度原位测量技术  

A new kind of velocity in-situ measuring technique for laser-driven flyer system

作　　者：牛锦超[1] 龚自正[2,1] 陈荣[3] 曹燕[1] 李宇[1] 杨继运[2,1] 夏开文[4] 

机构地区：[1]北京卫星环境工程研究所,北京100094 [2]可靠性与环境工程技术重点实验室,北京100094 [3]国防科学技术大学理学院技术物理研究所,长沙410073 [4]多伦多大学土木工程学院

出　　处：《航天器环境工程》2013年第4期426-430,共5页Spacecraft Environment Engineering

基　　金：国家重点基础研究发展计划(项目编号:2010CB731600);国家国防科工局空间碎片专项(编号:KJSP06209)

摘　　要：文章提出了一种新的微小飞片平均速度原位测量技术,并研制了速度测量装置。在飞片的飞行路径上设置片激光,通过测量飞片经过片激光的时间间隔及对应的飞行距离,便可获得飞片的平均速度。测量装置的主要部件是高频激光器和高灵敏度光电接收器,无其他复杂或者大型设备,易于与激光驱动微小飞片发射装置等配套衔接,操作方便,成本低。大量试验数据表明,测量装置工作稳定可靠,对厚度不小于3μm、速度不大于10 km/s的飞片,速度测量精度优于5%。Based on the laser beam shut-off method, a new kind of velocity in-situ measuring technique is presented, with which a non-contact velocity measuring apparatus is built. The velocity of a flyer is calculated by measuring the time interval in-situ while it flies through the laser screens for a certain distance. For the apparatus, a special miniature laser is employed to produce an optical screen with thichness of tens of micrometers; the photoelectric accepters with a response time less than 1 ns are used to record the time signals when a flyer is launched and arrived. This non-contact velocity measuring apparatus is very simple in components, with high sensitivity and is relatively inexpensive. The experimental data show that the measurement error is less than 5% for a flyer of 3 μm in thickness at a velocity approaching 10 km/s.

关 键 词：激光驱动飞片 飞片速度 速度原位测量 非接触式测速装置 

分 类 号：TN247[电子电信—物理电子学]