Simulation Research On Infrared Guided Laser Interference Technology

In the current battlefield,directional infrared countermeasure systems have been widely used,and laser interference is a critical module in directional infrared countermeasure systems.In the future electronic countermeasures,after the directional infrared countermeasure system first discovers the incoming infrared missile through the detector,the closed-loop system will first launch the laser-irradiated missile,analyze the guiding and tracking characteristics through feedback,and then the infrared laser is emitted by the laser.The most suitable modulation method is to interfere with the infrared seeker of the missile.In this context,the principle of laser interference for different infrared imaging guidance and the simulation of laser-interfering infrared air-to-air missile are studied,and the laser interference model is applied to the simulation of the US-based space-based infrared system high-orbiting satellite detector.The specific work carried out is as follows:(1)Firstly,the laser interference source is introduced.The characteristics of the laser are combined with the attenuation of the laser by the atmosphere and the influence of atmospheric turbulence on the Gaussian laser transmission.On this basis,the atmospheric transmittance is built.The simulation of the model introduces the detector saturation model and the transmission calculation of the laser in the optical system.(2)By studying the working principle of the infrared detector imaging system,the detector pixel saturation modeling is carried out,and some specific parameters are given.The law of charge overflow when the detector charge crosstalk is analyzed.(3)The mathematical model of laser interference AGC(Automatic Gain Control)circuit is established,And on this principle,the simulation of the interference of the pulse laser to the line array detector AGC circuit and the simulation of the segmentation continuous laser to the AGC circuit interference of the area array detector are carried out,and the laser modulation mode of the interference AGC circuit is obtained.(4)Based on the signal response model of laser interference infrared imaging system,the process of signal transmission and conversion in the system is analyzed.According to the characteristics of signal response function and automatic gain circuit,the contrast of the imagery gray value of laser interference infrared imaging system is realized.Stretching simulation experiment.The law of contrast contrast stretching of target imaging after laser interference is studied.(5)The simulation is carried out according to the laser interference detector saturation model and the pixel saturation model.The relationship between the interference saturation energy and the laser divergence angle,the laser emission distance,and the number of detector pixel saturation overflows are simulated.(6)The space-based infrared system early warning satellite detector is introduced.The characteristics of the atmosphere in the adjacent space are studied.According to the characteristics of the atmosphere above the adjacent space,the attenuation effect of the atmosphere above the adjacent space and the atmospheric turbulence effect are obtained.The laser power required for high-orbit satellite detectors.In this paper,the parameters of laser needed to interfere with Infrared Air-to-Air Missile and space-based infrared system are simulated under certain conditions.A new method of laser interfering with AGC circuit of infrared imaging system is proposed.