Study On Real-Time Infrared Image Generation System Based On MOS Resistor Array

With the characteristics of high guidance precision, significant anti-jamming capability and being able to work round the clock, infrared imaging guidance has become a main trend in the missile guidance technology development currently. If infrared imaging guidance weapon adopts real target for testing, the cost would be comparatively high and the effect would be easily affected by the environment. Thus, in order to reduce the cost, shorten the development cycle and improve the efficiency ratio, implementing simulation test in the laboratory is required to achieve the goal.The paper researches the real-time infrared image generation system based on MOS resistor array. Resistor array can display the infrared image, generated by computer simulation, to simulate the radiation of the objectives and background in complex environments. In this way, the system provides the objective target for weapon testing in the lab. Besides, the non-uniformity correction (NUC) for resistor array is studied in the paper as well. The main work of this paper is listed as follows:Firstly, according to the various functions needed to be achieved, the overall design of the real-time infrared image generation system can be divided into five components: image generation computer component, USB real-time transmission component, FPGA drive and control component, D/A conversion component and MOS resistor array component.Secondly, the paper completes the hardware and software design. Hardware design mainly includes: utilizing USB ASIC FX2 and FPGA together to fulfill USB interface design, designing modular within FPGA to complete the data receiving and storage by USB and working together with the D/A converter circuit to produce the drive and control signals for resistor array. The software development includes the USB firmware, drives and applications.Thirdly, this paper realized the non-uniformity correction technique on resistor array. By studying the piecewise linear correction algorithm and the method of resistor array output response measurement, this paper proposed an optimal correction algorithm based on the neural network structure to obtain a better correction effect.Finally, comprehensive system test is completed. The system correctness is verified by detecting the resistor array's drive and system's control signals and the physical test is carried out by means of self-made resistor array, indicating that the system can work correctly to complete task of infrared image generation.