| 差动激光多普勒测速仪在固体速度测量中的应用 |
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| 引用本文： | 周健,龙兴武.差动激光多普勒测速仪在固体速度测量中的应用[J].应用光学,2009,30(2):334-337. |
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| 作者姓名： | 周健 龙兴武 |
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| 作者单位： | 国防科学技术大学,光电科学与工程学院,湖南,长沙,410073 |
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| 摘 要： | 采用差动型后向散射的方式进行实验，利用数据采集卡PCI DAS-4020采集信号，并在Labview软件中对信号进行滤波处理，以提高信噪比，运用傅里叶变换(FFT)处理数据，计算出运动目标的速度并与实际速度进行了比较。结果表明该系统用于固体表面速度的测量切实可行，精度可达到2.2%。
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| 关 键 词： | 差动型 多普勒测速 Labview 快速傅里叶变换 |
| 收稿时间： | 2008/6/17 |
Application of differential laser Doppler velocimeter in solid velocity measurement |
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| ZHOU Jian,LONG Xing-wu.Application of differential laser Doppler velocimeter in solid velocity measurement[J].Journal of Applied Optics,2009,30(2):334-337. |
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| Authors: | ZHOU Jian LONG Xing-wu |
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| Institution: | College of Optoelectronic Science and Engineering, National University of
Defense Technology, Changsha 410073, China |
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| Abstract: | An experiment was carried out by differential measurement and backscattering mode. The Doppler signal was acquired by the data acquisition board PCI DAS-4020, and the signal data filtering was performed to improve SNR. The frequency spectrum was acquired by fast Fourier transform, and the calculated velocity of the moving target was compared with the actual velocity. The results show that the system is applicable for the velocity measurement of solid moving surfaces, and the accuracy can reach 2.2%. |
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| Keywords: | Labview |
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