基于目标辐射的被动测距方法
Passive Ranging Method Based on Target Radiation

为了满足现代战争的需要，对来袭目标的精确测量显得尤为重要。当前应用的主流探测手段是雷达探测。由于雷达为主动探测，在探测的过程中会暴露自己，很容易被敌方反辐射武器针对，而且武器隐身技术成为当下的主流，雷达的局限性愈发明显。红外被动测量方法则不然，任何有温度的物体都会辐射能量，利用此特性，既不会暴露自己，也可以很精确地获取来袭目标的距离温度信息。基于上述背景，本文利用美国空军大气传输软件MODTRAN生成不同温度、距离下目标在不同波段的透过率数据，利用Matlab计算出不同温度、距离下目标所对应的辐照度，通过对辐照度数据的分析与仿真，本文提出了红外目标的温度线和距离线概念，利用目标温度线及距离线，提出了两种新的红外被动测距方法。
In order to meet the needs of modern war, it is very important to accurately measure the incoming target. Radar detection is the main detection method currently used. As radar is active detection, it will expose itself in the detection process, and it is easy to be targeted by enemy anti-radiation weapons. Moreover, weapon stealth technology has become the mainstream at present, and the limitations of radar are increasingly obvious. The infrared passive measurement method is different. Any object with temperature will radiate energy. With this feature, it will not expose itself, and also can obtain the distance and temperature information of the incoming target very accurately. Based on the above background, this paper generated transmittance data under different temperatures and distances from target at different wavelengths by Modtran, and used Matlab to calculate the target’s irradiance under different temperatures and distances. Through the analysis of the irradiance data and simulation, this paper puts forward the concept of lines to the target temperature and the distance. A new infrared passive ranging method is developed by using target temperature line and range line. Secondly, the correlation analysis of the irradiance of the target in the spectrum is carried out, and it is found that the irradiance ratio of 9.0~9.2 and 9.2~9.4 bands is independent of temperature and strongly correlated with distance. Based on this finding, a new passive ranging method is proposed in this paper. The combination of the above two methods can improve the accuracy, fault tolerance and robustness of ranging.