In order to constantly and accurately recognize and track flying targets, using the infrared photoelectric detection system, while scientifically analyze the detection capability of the system, in complex background environments. This paper analyzes the measurement principle of the infrared photoelectric detection system, establishes a radiation energy calculation model of the background and the optical system and the target on the photoelectric detector surface. It further analyzes the influence of the photoelectric detector wavelength, the slit diaphragm and of the target effective radiation area, on the radiation energy. It obtains the contrast ratio calculation model between the target and the background, on the photoelectric detector surface, while it also derives the detection distance model of the system, combining the modulation transfer function of the system, to set up an improved detection distance calculation model, in complex background environments. Simulation and experimental analysis show that as background radiation brightness increases, in certain background environments, the detection distance of the system gradually reduces, while changing the slit diaphragm and photoelectric detector wavelength can improve the detection performance of the system. In complex background environments, changing the contrast ratio of photoelectric detector surface should be considered, to improve the detection capability of the system.

中文翻译：

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具有改进的检测能力的红外检测系统的计算模型

为了不断准确地识别和跟踪飞行目标，在复杂的背景环境中，使用红外光电检测系统，同时科学地分析了系统的检测能力。本文分析了红外光电探测系统的测量原理，建立了光电探测器表面背景，光学系统和目标的辐射能计算模型。它进一步分析了光电探测器波长，缝隙光阑和目标有效辐射区域对辐射能量的影响。它获得了光电探测器表面上目标与背景之间的对比度计算模型，同时还得出了系统的探测距离模型，结合系统的调制传递函数，可以在复杂的背景环境中建立改进的检测距离计算模型。仿真和实验分析表明，随着背景辐射亮度的增加，在一定的背景环境下，系统的检测距离逐渐减小，而改变缝隙光阑和光电探测器的波长可以提高系统的检测性能。在复杂的背景环境中，应考虑改变光电探测器表面的对比度，以提高系统的探测能力。在某些背景环境下，系统的检测距离逐渐减小，而改变缝隙光阑和光电探测器的波长可以提高系统的检测性能。在复杂的背景环境中，应考虑改变光电探测器表面的对比度，以提高系统的探测能力。在某些背景环境下，系统的检测距离逐渐减小，而改变缝隙光阑和光电探测器的波长可以提高系统的检测性能。在复杂的背景环境中，应考虑改变光电探测器表面的对比度，以提高系统的探测能力。