| 激光多普勒测速中散射粒子的大小对信噪比的影响 |
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| 引用本文： | 黄德康,李彩荣,朱茂华.激光多普勒测速中散射粒子的大小对信噪比的影响[J].光学技术,2003,29(2):164-165. |
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| 作者姓名： | 黄德康 李彩荣 朱茂华 |
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| 作者单位： | 大连海事大学,数理系,辽宁,大连,116026 |
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| 摘 要： | 采用双光束干涉条纹模型,用光散射理论分析了激光多普勒测速中球形散射粒子的大小对散射光信噪比的影响。用数值解法求得了信噪比随散射粒子半径变化的曲线。仅从穿过测控区时光信号的信噪比这一方面考虑,结论是:粒子半径的取值不应大于干涉条纹宽度的0.35倍。
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| 关 键 词： | 激光测速 散射粒子 信噪比 |
| 文章编号： | 1002-1582(2003)02-0164-02 |
| 修稿时间： | 2002年4月15日 |
Effect of scattering particle size on signal to noise ratio in Doppler speed measuring with laser device |
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| Abstract: | The scattering theory of light is applied to the analysis of the effect of scattering particle size on signal to noise ratio in Doppler speed measuring with laser device, in which the model of the interference fringes between two beams is employed. Mathematical method is applied to obtain the curves of the variation of signal to noise ratio with the variation of particle radius. It comes to a conclusion that the magnitude of particle radius should not be over 0.35 of interference fringe. |
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| Keywords: | scattering particle signal to noise ratio speed measuring with laser device |
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