活動(dòng)態(tài)高速數(shù)字設(shè)備泄漏電磁波檢測研究與系統(tǒng)實(shí)現(xiàn)
發(fā)布時(shí)間：2018-10-21 18:14
【摘要】：數(shù)字設(shè)備工作時(shí)會(huì)向外界輻射微弱電磁波信號(hào),雖然微弱,但是依然可能會(huì)對(duì)國防與信息安全造成威脅。因此,研究高速數(shù)字設(shè)備的檢測方法、設(shè)計(jì)與搭建檢測平臺(tái)變得十分重要。隨著大規(guī)模集成電路的技術(shù)發(fā)展,芯片的體積越來越小、功耗越來越低,造成芯片向外界輻射的電磁波能量相應(yīng)減弱;同時(shí)電磁兼容與防電磁輻射技術(shù)的不斷提高,一定程度上又削弱了數(shù)字系統(tǒng)向外界輻射的電磁波信號(hào),以上兩種因素使得數(shù)字設(shè)備泄漏電磁波能量強(qiáng)度降低,給傳統(tǒng)的數(shù)字設(shè)備泄漏信號(hào)的檢測帶來了困難。本文以活動(dòng)態(tài)高速數(shù)字設(shè)備泄漏電磁波為研究對(duì)象,重點(diǎn)研究此類設(shè)備泄漏電磁波的檢測方法,同時(shí)也設(shè)計(jì)和制作檢測儀器。完成的主要工作包括:測試了系列化高速數(shù)字設(shè)備樣品,驗(yàn)證了絕大多數(shù)高速數(shù)字設(shè)備在工作時(shí)會(huì)向外界發(fā)射電磁波信號(hào)。在硬件方面,設(shè)計(jì)了超外差式掃描變頻模塊、數(shù)據(jù)采集模塊、基于FPGA的數(shù)據(jù)預(yù)處理模塊和系統(tǒng)控制模塊。超外差式掃描變頻模塊采用混頻方法,將目標(biāo)寬頻頻帶轉(zhuǎn)換到固定的中頻頻帶,便于后續(xù)的硬件電路處理;數(shù)據(jù)預(yù)處理模塊利用FPGA并行計(jì)算能力,把模數(shù)轉(zhuǎn)換后的數(shù)據(jù)進(jìn)行預(yù)處理,為后續(xù)的PC軟件端處理數(shù)據(jù)節(jié)省時(shí)間。軟件方面,基于QT(一種基于C++的跨平臺(tái)圖形用戶界面應(yīng)用程序)架構(gòu)編寫了基于層次網(wǎng)格的K-means聚類識(shí)別模塊、識(shí)別結(jié)果與實(shí)時(shí)頻譜二維圖譜顯示模塊和系統(tǒng)控制功能模塊;對(duì)于未知先驗(yàn)知識(shí)的數(shù)字設(shè)備,聚類識(shí)別模塊能快速提取各個(gè)頻段特征信息,通過與背景信息對(duì)比,達(dá)到識(shí)別目的;二維頻譜圖顯示模塊能同時(shí)實(shí)時(shí)地顯示目標(biāo)頻譜與識(shí)別結(jié)果信息;系統(tǒng)控制模塊即實(shí)現(xiàn)軟件客戶端程序正常運(yùn)行,又與FPGA采集板保持同步狀態(tài)。最后,設(shè)計(jì)和搭建了測試系統(tǒng),對(duì)不同參數(shù)的系列化高速數(shù)字設(shè)備樣品進(jìn)行了測試,實(shí)測結(jié)果表明,可對(duì)活動(dòng)態(tài)數(shù)字設(shè)備泄漏的電磁波進(jìn)行有效檢測,證明了系統(tǒng)的有效性。
[Abstract]:Digital devices radiate weak electromagnetic signals to the outside world when they work. Although they are weak, they may still pose a threat to national defense and information security. Therefore, it is very important to study the detection method of high-speed digital equipment and to design and build the detection platform. With the development of LSI technology, the size of the chip becomes smaller and smaller, and the power consumption becomes lower and lower, which results in the weakening of the electromagnetic wave energy emitted by the chip to the outside world. At the same time, the technology of electromagnetic compatibility and protection against electromagnetic radiation has been improved. To some extent, it weakens the electromagnetic wave signal radiating from digital system to the outside world. The above two factors reduce the energy intensity of digital equipment leakage electromagnetic wave, and bring difficulties to the detection of traditional digital equipment leakage signal. In this paper, the leakage electromagnetic wave of dynamic high-speed digital equipment is taken as the research object, the detection method of leakage electromagnetic wave of this kind of equipment is studied emphatically, and the detecting instrument is also designed and made. The main works are as follows: the series of high-speed digital equipment samples are tested and it is verified that most high-speed digital devices emit electromagnetic wave signals to the outside world. In the hardware aspect, the superheterodyne scanning frequency conversion module, the data acquisition module, the data preprocessing module based on FPGA and the system control module are designed. The superheterodyne scanning frequency conversion module uses mixing method to convert the target wide frequency band to a fixed medium frequency band, which is convenient for subsequent hardware circuit processing, and the data preprocessing module utilizes the parallel computing ability of FPGA. The data after analog-to-digital conversion are preprocessed to save time for the subsequent PC software to process the data. In software aspect, based on QT (a cross-platform graphical user interface application program based on C), the K-means cluster recognition module based on hierarchical grid is developed, the recognition result and real-time spectrum two-dimensional display module and system control function module; For the digital equipment with unknown prior knowledge, the cluster recognition module can quickly extract the feature information of each frequency band and achieve the purpose of recognition by comparing with the background information. The two-dimensional spectrum display module can simultaneously display the target spectrum and the recognition result information in real time, and the system control module not only realizes the software client program running normally, but also keeps synchronization with the FPGA acquisition board. Finally, the test system is designed and built, and the series of high-speed digital equipment samples with different parameters are tested. The measured results show that the electromagnetic wave leakage from the dynamic digital equipment can be effectively detected, and the effectiveness of the system is proved.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：O441.4;TP274
[Abstract]:Digital devices radiate weak electromagnetic signals to the outside world when they work. Although they are weak, they may still pose a threat to national defense and information security. Therefore, it is very important to study the detection method of high-speed digital equipment and to design and build the detection platform. With the development of LSI technology, the size of the chip becomes smaller and smaller, and the power consumption becomes lower and lower, which results in the weakening of the electromagnetic wave energy emitted by the chip to the outside world. At the same time, the technology of electromagnetic compatibility and protection against electromagnetic radiation has been improved. To some extent, it weakens the electromagnetic wave signal radiating from digital system to the outside world. The above two factors reduce the energy intensity of digital equipment leakage electromagnetic wave, and bring difficulties to the detection of traditional digital equipment leakage signal. In this paper, the leakage electromagnetic wave of dynamic high-speed digital equipment is taken as the research object, the detection method of leakage electromagnetic wave of this kind of equipment is studied emphatically, and the detecting instrument is also designed and made. The main works are as follows: the series of high-speed digital equipment samples are tested and it is verified that most high-speed digital devices emit electromagnetic wave signals to the outside world. In the hardware aspect, the superheterodyne scanning frequency conversion module, the data acquisition module, the data preprocessing module based on FPGA and the system control module are designed. The superheterodyne scanning frequency conversion module uses mixing method to convert the target wide frequency band to a fixed medium frequency band, which is convenient for subsequent hardware circuit processing, and the data preprocessing module utilizes the parallel computing ability of FPGA. The data after analog-to-digital conversion are preprocessed to save time for the subsequent PC software to process the data. In software aspect, based on QT (a cross-platform graphical user interface application program based on C), the K-means cluster recognition module based on hierarchical grid is developed, the recognition result and real-time spectrum two-dimensional display module and system control function module; For the digital equipment with unknown prior knowledge, the cluster recognition module can quickly extract the feature information of each frequency band and achieve the purpose of recognition by comparing with the background information. The two-dimensional spectrum display module can simultaneously display the target spectrum and the recognition result information in real time, and the system control module not only realizes the software client program running normally, but also keeps synchronization with the FPGA acquisition board. Finally, the test system is designed and built, and the series of high-speed digital equipment samples with different parameters are tested. The measured results show that the electromagnetic wave leakage from the dynamic digital equipment can be effectively detected, and the effectiveness of the system is proved.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：O441.4;TP274
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 李彩華;滕云田;張e，
本文編號(hào)：2285941
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