一种用热像仪获得烟幕透过率的方法

A Method to Acquire Transmission of Smoke with Thermal Imager

提出了一种用热像仪测试烟幕透过率的方法。经详细分析烟幕遮蔽前后热像仪探测器接收到的红外辐射情况,并经理论推导得出:不考虑烟幕释放对环境辐射和大气辐射的影响时,只需用热像仪对同一场景拍摄其烟幕释放前后的图像,利用这两幅图像的灰度信息即可获得烟幕的透过率,并且,只要场景选择合适,应用该方法可以测得烟幕的透过率分布。论文最后讨论了减小透过率计算误差的方法和获得烟幕透过率分布的技术途径。

A new method to acquire transmission of smoke is proposed in this paper. Through analyzing the infrared radiation received by thermal imager before and after smoke is fired, the conduction shows that if the effect of smoke on the radiation of atmosphere and surrounding is not considered, the transmission of smoke can be acquired from the two pieces of gray images from thermal imager before and after smoke is fired, and if a certain scene is obtained, and the distribution of the smoke transmission can be gotten as above motioned. Lastly, a method to reduce the error of calculation the transmission and a technologic approach to acquire the distribution of smoke transmission are discussed.