从红外遥感辐射传输理论出发,利用二流近似方法,建立了包含散射影响的生物气溶胶被动红外探测模型;从理论上阐明了气溶胶对四周辐射的散射对生物气溶胶被动红外探测的影响。以某微生物孢子气溶胶为对象开展探测原理试验,研究了生物气溶胶红外光谱特性。给出了生物气溶胶室内吸收池试验结果,用辐射传输模型解释了试验现象。通过试验验证了探测模型的合理性、有效性;结合探测模型和室内试验结果,也可为外场试验的开展提供参考。

A model is built from the infrared remote sensing radiative transfer theory and the two stream approximation for passive infrared detection of biological aerosol,which theoretically illustrates the effect of scattering of radiances from all sides incident on the aerosol. The laboratory principal experiments are conducted on a microorganism spores aerosol for studying the infrared spectral properties of biological aerosol. The results of preliminary laboratory experiments in bioaerosol cell are presented,and the experimental phenomena are explained with radiative transfer model. It is shown that the detection model are effective and reasonable. Combining the detection model and the laboratory experimental results can give a reference for field passive standoff detection experiments of biological aerosol.