本文選題：無源毫米波成像系統(tǒng) + 嵌入式系統(tǒng)��； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：無源毫米波成像技術(shù)以黑體輻射理論為基本理論,以不同物體和背景之間的毫米波能量差異實現(xiàn)成像,以圖像預(yù)處理、超分辨處理等算法提高成像結(jié)果的質(zhì)量。無源毫米波成像具有三個特點:對特定的材料具有一定的穿透能力,即一定的反偽裝能力;對金屬物體有較高的成像對比度;能夠穿透云霧、戰(zhàn)場硝煙,可以全天時、全天候的工作。目前,無源毫米波成像技術(shù)大量應(yīng)用于防恐、反恐、機場安檢、危險物品探測等方面。早期的成像系統(tǒng)顯控終端一般是用電腦進行處理,電腦體積龐大,不符合集成化、小型化的趨勢。為了逐步實現(xiàn)成像系統(tǒng)集成化、小型化,在本課題中,采用了嵌入式系統(tǒng)作為顯示控制單元的開發(fā)平臺。將嵌入式系統(tǒng)應(yīng)用于無源毫米波成像系統(tǒng)顯控終端設(shè)計中,會在系統(tǒng)的集成化、便攜性、可靠性,成本控制方面得到很大的改善。由于無源毫米波成像系統(tǒng)在軍事領(lǐng)域、安檢方面的大量應(yīng)用,高集成化、高便攜性、高可靠性的嵌入式有著重大應(yīng)用價值。本論文依托相關(guān)項目,對成像系統(tǒng)的顯示控制單元進行了深入的研究。研究內(nèi)容和成果總結(jié)如下:1.結(jié)合成像系統(tǒng)的技術(shù)指標,計算系統(tǒng)參數(shù),對嵌入式系統(tǒng)進行了研究和部件選型,完成顯控終端的設(shè)計方案。其中包括硬件平臺的選型、傳輸接口的確定、操作系統(tǒng)的選型、界面程序開發(fā)環(huán)境的確定。2.在宿主機上建立Linux的開發(fā)環(huán)境、建立宿主機和目標平臺的交叉編譯環(huán)境、配置超級終端方便PC端對目標平臺的控制;完成顯控終端操作系統(tǒng)的專用Linux內(nèi)核的定制與移植以及根文件系統(tǒng)制作。3.打通顯控終端與成像系統(tǒng)其它模塊之間的接口(與信號處理與預(yù)處理單元、伺服控制單元之間是串口,與信號處理單元之間是SPI接口),完成接口驅(qū)動程序的編寫與測試。4.完成了顯控終端與信號處理單元之間的調(diào)試,調(diào)試結(jié)果能夠滿足成像系統(tǒng)在實時性、正確性方面的要求。5.完成了顯控終端的界面設(shè)計與實現(xiàn)。其中包括實現(xiàn)了掃描控制區(qū)、圖像對比區(qū)各個模塊中按鍵的功能,實現(xiàn)了圖像數(shù)據(jù)的接收顯示。
[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.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN873;TP368.1
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本文編號：2052467