Research And Implementation Of Real-time Simulation Technology For Physical Effects Of Infrared Imaging System

With the continuous research of infrared imaging simulation technology,people are paying more and more attention to how to further improve the accuracy of simulation results.At the same time,real-time simulation has become one of the crucial indicators for evaluating simulation technology.Compared with the traditional all-digital infrared simulation technology using a computer as the simulation platform,this paper uses the infrared imaging system simulator as the research platform,and studies the physical effect simulation technology of the infrared imaging system on the simulator hardware platform.Based on the parallel computing of FPGA and pipeline algorithm,it not only greatly improves the speed of simulation but also meets the requirements of simulation real-time.Firstly,the paper briefly introduces the working principle of the infrared imaging system and analyzes the physical effects of the infrared imaging system theoretically.After a certain approximation and combination,the imaging physical effects of infrared imaging system are summarized into six categories.According to the imaging characteristics of different physical effects,the simulation methods of various imaging physical effects are studied.Further,an infrared imaging system physical effect simulation platform——the infrared imaging system simulator is introduced,and the working principle,software&hardware platform of the simulator are analyzed.Based on this,the algorithm framework of infrared imaging physical effects is summarized.Secondly,the paper implementes each functional module in turn according to the modularization thinking.System Input Output and Storage Module mainly include DVI input and interception modules,imaging physical effect parameter storage modules,DDR2 SDRAM cache modules and detector timing output modules.These modules respectively realize the functions of image input and interception,storage of imaging physical effect parameters,high-data-rate image cache and analog detector timing output;The high-speed real-time calculation module of infrared imaging physical effects is the focus and difficulty of this design.After studying the algorithm principle and data flow of each imaging physical effect,the paper realizes the high-speed calculation of each infrared imaging physical efect,using the method of pipeline design and parallel processing.Finally,the paper debugs and verifies the overall function of the infrared imaging system simulator.According to the idea of modularization,the system input and output and storage modules are debugged and verified in sequence.For evaluating the accuracy of imaging physical effect simulation results,on the one hand,Chipscope is used to sample the results of each physical effect algorithm,and the sampling results are as expected;on the other hand,the total imaging physical effects are verified,six similarity parameters are calculated by comparing the similarity between the simulated image and the theoretical image.After comprehensive analysis and evaluation,the simulation results are in line with expectations,thereby verifying the correctness of the simulation results of the physical effects of infrared imaging.At the end of the paper,we summarize and analyze the deficiencies of the paper,and then point out the direction for further optimization.