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采用基于蒙特卡罗的多次散射模型,研究无公共散射体传输模型下紫外光(UV)传输特性,对该模型下UV在大气中传输的平均散射次数随距离的变化情况、路径损耗随传输距离的变化情况、脉冲响应时间延迟随传输距离的变化情况以及脉冲响应曲线随能见度的变化情况进行仿真分析。结果显示,无公共散射体传输模型下的UV至少需要两次的大气散射才能够到达接收端,相同传输距离无公共散射体传输模型的路径损耗和脉冲响应时间延迟也远高于有公共散射体传输模型的路径损耗和脉冲响应时间延迟。通过归一化得到的随能见度变化的脉冲响应曲线发现,无公共散射体传输模型在大气中传输的脉冲响应时间延迟不随能见度的变化而变化,但脉冲响应峰值高度随能见度的增大而增高。
Based on the multiple scattering model based on Monte Carlo, the UV transmission characteristics under the non-common scatterer transmission model are studied. The average scattering times of UV transmitted in the atmosphere with distance under this model are changed with the distance, The variation of distance, the delay of impulse response with the change of transmission distance, and the simulation of impulse response curve with the change of visibility. The results show that at least two atmospheric scatters in the non-common scatterer transmission model can reach the receiving end. The path loss and impulse response time delay of the same transmission distance without common scatterer transmission model are much higher than those with common scatterer The path loss and impulse response delay of the transmission model. The normalized impulse response curve with the change of visibility shows that the impulse response time lag of transmission without the common scatterer in atmosphere does not change with the change of visibility, but the peak height of impulse response increases with the increase of visibility.