| 激光自混合多普勒测速法 |
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| 引用本文： | 付似愚,韩道福,马力.激光自混合多普勒测速法[J].南昌大学学报(理科版),2007,31(3):264-267. |
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| 作者姓名： | 付似愚 韩道福 马力 |
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| 作者单位： | 1. 南昌大学,机电学院,江西,南昌,330031
2. 南昌大学,基础物理实验中心,江西,南昌,330031 |
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| 摘 要： | 利用激光自混合技术结合多普勒测速方法,来改进传统多普勒光路的光路复杂等缺陷.自混合技术中,反馈光会引起腔内的输出增益变化.根据激光的增益变化和频率变化成线性关系,可以对信号进行处理求出多普勒频移.用能量重心校正法对多普勒频移校正,进而得到物体的运动速度的模拟计算值.
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| 关 键 词： | 激光自混合干涉 多普勒测速 增益 激光 自混合 多普勒测速 Effect Based 计算值 模拟 运动速度 物体 多普勒频移校正 校正法 能量重心 处理 信号 线性关系 频率变化 增益变化 输出 起腔 反馈 |
| 文章编号： | 1006-0464（2007）03-0264-04 |
| 修稿时间： | 2007-01-10 |
Reseach of Laser-doppler Velocimetry Based on the Self-mixing Effect |
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| FU Si-yu,HAN Dao-fu,MA Li.Reseach of Laser-doppler Velocimetry Based on the Self-mixing Effect[J].Journal of Nanchang University(Natural Science),2007,31(3):264-267. |
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| Authors: | FU Si-yu HAN Dao-fu MA Li |
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| Institution: | a. College of Mechanical and Electronic Engineering; b. Center of Physical Experiments, Nanchang University, Nanchang 330031, China |
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| Abstract: | The self-mixing effect is applied to laser-Doppler velocimetry(LDV) for improving the traditional LDV which has the more complex system.When a small fraction of the light back-reflected or back-scattered by a moving target re-enters into the laser cavity,the output gain change in the cavity will be caused.According to the laser gain change is linear related to the frequency shift,the Doppler frequency is extracted by the signal processing.The energy centrobaric method is made use of correcting the Doppler spectrum,the simulation predicted value of the target velocity is obtained. |
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| Keywords: | self - mixing effect laser - Doppler velocimetry gain |
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