| 夏云芝,邓贤君,唐潇,敖珺,马春波.激光在雨中传输的衰减特性分析及实验研究[J].南华大学学报(自然科学版),2019,33(5):54~59.[XIA Yunzhi,DENG Xianjun,TANG Xiao,AO Jun,MA Chunbo.Analysis and Experimental Study on Attenuation Characteristic of Laser Propagation in Rain[J].Journal of University of South China(Science and Technology),2019,33(5):54~59.] |
| 激光在雨中传输的衰减特性分析及实验研究 |
| Analysis and Experimental Study on Attenuation Characteristic of Laser Propagation in Rain |
| 投稿时间：2019-03-31 |
| DOI： |
| 中文关键词: 激光传输 降雨衰减 大气信道 M-P模型 |
| 英文关键词:laser propagation rain attenuation atmospheric channel M-P model |
| 基金项目:国家自然科学基金青年科学基金项目(61401193;41904163);湖南省教育厅科学研究资助项目(18C0416) |
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| 中文摘要: |
| 降雨会对激光传输造成严重的衰减。通过分析常用的雨的经验模型,用Matlab仿真对各种模型进行了对比,发现当降雨量为广布雨时,Weibull分布、Joss和Gamma分布结果几乎一致,而M-P模型的衰减特性则为稍微偏大;当降雨量为毛毛雨和雷阵雨时,Joss模型的衰减特性与其它模型相比分别为相对偏大和相对偏小。为了验证模型的正确性及对桂林本地天气的适用性,通过多次实验得出:532 nm波长激光在雨衰减信道下传输衰减与M-P模型更接近,即M-P模型更加适用于全年降雨天气较多的桂林的大气雨衰减预测。 |
| 英文摘要: |
| The raindrops would lead to serious attenuation to the laser signal.In this work,an empirical models (like M-P,Weibull,etc) simulated by Matlab indicate that the predicted attenuation characteristic of Weibull model is same as that of Joss and Gamma models when rainfall is widespread while the attenuation characteristics of M-P model is slightly larger.In addition,the characteristic of Joss model is larger when the rainfall is drizzle,and smaller when the thunderstorm occurs.In order to verify the correctness of the model and its applicability to the local weather in Guilin,multiple experiments were carried out.The experimental result shows that the predicted attenuation of M-P model is closer to measurement result,the M-P distribution is more suitable for laser transmission attenuation prediction through rain in Guilin. |
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