制冷型红外成像系统电路研究

发布时间：2018-03-18 18:43

本文选题：红外焦平面阵列　切入点：FPGA　出处：《南京理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着红外成像技术的快速发展,红外成像系统在军事和民用上都发挥着重要作用。本文从我国军事应用的实际要求出发,就“制冷型红外成像系统电路研究”这一项目,利用国产的制冷型红外焦平面阵列探测器,以小型化、低功耗、实时性为目标,设计一套红外图像处理系统。本文在介绍国内外红外成像技术发展应用的基础上,分析了红外图像的特点和影响红外图像质量的因素,探讨了非均匀校正、盲元替换和图像增强等图像处理算法,为系统的设计和研发提供了理论指导。针对探测器与红外图像特点和项目的实际要求,设计了基于现场可编程门阵列(FPGA)的小型化、低功耗硬件成像电路,其中包括焦平面探测器驱动电路、模拟信号调理电路、A/D数据采集电路、基于FPGA的数字信号处理电路、视频编码电路、测温电路和电源电路。在硬件电路的基础上,配合算法模块,完成了对红外图像非均匀性校正、盲元替换、图像增强等处理,得到了符合要求的红外图像。最终,完成整个制冷型小型化红外成像系统的调试与测试。得到了清晰的红外图像,并且整个红外成像系统体积小、功耗低、信号处理速度快,基本达到了项目要求的目标。
[Abstract]:With the rapid development of infrared imaging technology, infrared imaging system plays an important role in both military and civil applications. A set of infrared image processing system is designed with the aim of miniaturization, low power consumption and real time using domestic refrigerated infrared focal plane array detector. The development and application of infrared imaging technology at home and abroad are introduced in this paper. The characteristics of infrared image and the factors affecting the quality of infrared image are analyzed, and the image processing algorithms such as non-uniform correction, blind element replacement and image enhancement are discussed. It provides theoretical guidance for the design and development of the system. According to the characteristics of detectors and infrared images and the actual requirements of the project, a miniaturized, low-power hardware imaging circuit based on FPGA (Field Programmable Gate Array) is designed. It includes focal plane detector driving circuit, analog signal conditioning circuit and A / D data acquisition circuit, digital signal processing circuit based on FPGA, video coding circuit, temperature measuring circuit and power supply circuit. With the algorithm module, the processing of infrared image nonuniformity correction, blind element replacement, image enhancement and so on is completed, and the infrared image that meets the requirements is obtained. The whole refrigeration miniaturized infrared imaging system is debugged and tested. A clear infrared image is obtained, and the whole infrared imaging system is small in size, low in power consumption, fast in signal processing, and has basically reached the goal of the project.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN219

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