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多波长荧光激光雷达系统用来在生物气溶胶或烟尘到达地面之前进行远距离探测,该系统是一种主动遥感系统,同时具有紫外和红外探测的能力。紫外波长能够提供对生物气溶胶云近实时的探测,并具有一定的分辨能力;红外波长的使用扩大了系统对气溶胶云的探测距离。文中对系统进行了简单描述,同时估算了激光诱导荧光技术探测生物气溶胶的能力,对白天和晚上探测生物气溶胶粒子的信噪比进行了数值模拟,分析了影响信噪比的因素,对实际系统的构建具有指导意义。
The Multi-wavelength Fluorescence Lidar system is intended for long-range detection before biological aerosol or soot arrives on the ground. This system is an active remote sensing system with both UV and IR detection capabilities. The UV wavelength provides nearly real-time detection of bio-aerosol clouds and has certain resolution; the use of infrared wavelengths expands the system’s detection range for aerosol clouds. In this paper, the system is briefly described. Meanwhile, the ability of laser-induced fluorescence to detect bio-aerosol is estimated. The signal-to-noise ratio of bioassay aerosol is numerically simulated during daytime and nighttime. The construction of the actual system is instructive.