| VISAR测速中的信号丢失及丢失条纹数的确定 |
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| 引用本文： | 李泽仁,姚建铨.VISAR测速中的信号丢失及丢失条纹数的确定[J].爆炸与冲击,1999,19(2):182-187. |
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| 作者姓名： | 李泽仁 姚建铨 |
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| 作者单位： | [1]天津大学精密仪器与光电子工程学院 [2]中物院流体物理研究所 |
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| 摘 要： | 论述了ＶＩＳＡＲ测速中信号频率与被测速度增量的关系和光电倍增管、数字示波器所能响应的最高速度增量。分析了信号丢失的原因，给出了丢失条纹数的确定方法。最后对ＶＩＳＡＲ应用中如何正确选择条纹常数提出了建议。
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| 关 键 词： | 激光测速 速度增量 信号丢失 条纹数 爆轰 冲击 |
SIGNAL LOSS AND DETERMINATION OF LOST FRINGE NUMBER IN VISAR APPLICATION |
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| Li Zeren a,b,Yao Jinaquan a.SIGNAL LOSS AND DETERMINATION OF LOST FRINGE NUMBER IN VISAR APPLICATION[J].Explosion and Shock Waves,1999,19(2):182-187. |
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| Authors: | Li Zeren a b Yao Jinaquan a |
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| Abstract: | The relation between signal frequency and measured velocity variation and the largest velocity variation,which can be responded by photomultiplier and digital oscilloscope in the VISAR application are discussed.In this paper the reason of signal loss is analysed and the method of calculationg the lost fringe number is described.The suggestion how to select fringe constant when VISAR is used to measure the velocity history in shock or explosion compression experiments is also given. |
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| Keywords: | VISAR signal frequency velocity variation signal loss fringe number |
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