| 一种非接触式微小飞片速度原位测量技术 |
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| 引用本文： | 牛锦超,龚自正,陈荣,曹燕,李宇,杨继运,夏开文. 一种非接触式微小飞片速度原位测量技术[J]. 航天器环境工程, 2013, 30(4): 426-430 |
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| 作者姓名： | 牛锦超 龚自正 陈荣 曹燕 李宇 杨继运 夏开文 |
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| 作者单位： | 1.可靠性与环境工程技术重点实验室, 北京 100094 |
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| 基金项目： | 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） |
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| 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%。
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| 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 |
A new kind of Velocity in-situ measuring technique for laser-driven flyer system |
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| Niu Jinchao,Gong Zizheng,Chen Rong,Cao Yan,Li Yu,Yang Jiyun and Xia Kaiwen. A new kind of Velocity in-situ measuring technique for laser-driven flyer system[J]. Spacecraft Environment Engineering, 2013, 30(4): 426-430 |
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| Authors: | Niu Jinchao Gong Zizheng Chen Rong Cao Yan Li Yu Yang Jiyun Xia Kaiwen |
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| Affiliation: | 1.Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China2.Science and Technology on Reliability and Environmental Engineering Laboratory, Beijing 100094, China3.Institute of Technical Physics, College of Science, National University of Defense Technology, Changsha 410073, China4.Department of Civil Engineering, University of Toronto, Toronto M5S 1A4, Canada |
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| Abstract: | 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. |
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| Keywords: | laser-driven flyer flyer velocity in-situ measuring of velocity non-contact velocity measuring apparatus |
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