基于ARM的无源毫米波成像系统显控终端设计

发布时间：2018-06-22 09:58

  本文选题：无源毫米波成像系统 + 嵌入式系统　； 参考：《电子科技大学》2014年硕士论文

【摘要】：无源毫米波成像技术以黑体辐射理论为基本理论,以不同物体和背景之间的毫米波能量差异实现成像,以图像预处理、超分辨处理等算法提高成像结果的质量。无源毫米波成像具有三个特点:对特定的材料具有一定的穿透能力,即一定的反伪装能力;对金属物体有较高的成像对比度;能够穿透云雾、战场硝烟,可以全天时、全天候的工作。目前,无源毫米波成像技术大量应用于防恐、反恐、机场安检、危险物品探测等方面。早期的成像系统显控终端一般是用电脑进行处理,电脑体积庞大,不符合集成化、小型化的趋势。为了逐步实现成像系统集成化、小型化,在本课题中,采用了嵌入式系统作为显示控制单元的开发平台。将嵌入式系统应用于无源毫米波成像系统显控终端设计中,会在系统的集成化、便携性、可靠性,成本控制方面得到很大的改善。由于无源毫米波成像系统在军事领域、安检方面的大量应用,高集成化、高便携性、高可靠性的嵌入式有着重大应用价值。本论文依托相关项目,对成像系统的显示控制单元进行了深入的研究。研究内容和成果总结如下:1.结合成像系统的技术指标,计算系统参数,对嵌入式系统进行了研究和部件选型,完成显控终端的设计方案。其中包括硬件平台的选型、传输接口的确定、操作系统的选型、界面程序开发环境的确定。2.在宿主机上建立Linux的开发环境、建立宿主机和目标平台的交叉编译环境、配置超级终端方便PC端对目标平台的控制;完成显控终端操作系统的专用Linux内核的定制与移植以及根文件系统制作。3.打通显控终端与成像系统其它模块之间的接口(与信号处理与预处理单元、伺服控制单元之间是串口,与信号处理单元之间是SPI接口),完成接口驱动程序的编写与测试。4.完成了显控终端与信号处理单元之间的调试,调试结果能够满足成像系统在实时性、正确性方面的要求。5.完成了显控终端的界面设计与实现。其中包括实现了扫描控制区、图像对比区各个模块中按键的功能,实现了图像数据的接收显示。
[Abstract]:Passive millimeter-wave imaging technology is based on blackbody radiation theory. It is based on millimeter wave energy difference between different objects and backgrounds. Image preprocessing and super-resolution processing are used to improve the quality of imaging results. Passive millimeter-wave imaging has three characteristics: it has a certain penetrating ability to a specific material, that is, a certain anti-camouflage ability, a high imaging contrast to a metal object, a ability to penetrate clouds and fog, battlefield smoke, and can be used all day. An all-weather job. At present, passive millimeter wave imaging technology is widely used in terrorism prevention, anti-terrorism, airport security, dangerous goods detection and so on. The display and control terminal of the early imaging system is usually processed by computer. The computer is huge and does not conform to the trend of integration and miniaturization. In order to realize the integration and miniaturization of the imaging system, the embedded system is used as the development platform of the display control unit. The application of embedded system in the design of display and control terminal of passive millimeter wave imaging system will greatly improve the integration, portability, reliability and cost control of the system. Because passive millimeter wave imaging system is widely used in military field and security inspection, embedded system with high integration, high portability and high reliability has great application value. Based on the related projects, the display control unit of the imaging system is deeply studied in this paper. The contents and results of the study are summarized as follows: 1. Combined with the technical index of the imaging system and the calculation of the system parameters, the embedded system is studied and the components are selected to complete the design of the display and control terminal. It includes the selection of hardware platform, the determination of transmission interface, the selection of operating system, and the determination of interface program development environment. The development environment of Linux is established on the host computer, the cross-compiling environment between the host computer and the target platform is established, and the super terminal is configured to facilitate the PC to control the target platform. Complete the display terminal operating system special Linux kernel customization and transplantation and root file system production. 3. The interface between display control terminal and other modules of imaging system (serial port between signal processing and preprocessing unit, serial port between servo control unit and signal processing unit, SPI interface between servo control unit and signal processing unit) is opened, and the interface driver program is written and tested. The debugging between the display terminal and the signal processing unit is completed. The debugging results can meet the requirements of real-time and correctness of the imaging system. The interface of display and control terminal is designed and implemented. The function of keystroke in each module of scan control area and image contrast area is realized, and the receiving and displaying of image data is realized.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN873;TP368.1
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本文编号：2052467