發(fā)布時(shí)間：2019-06-11 12:22

【摘要】：毫米波具有很強(qiáng)的穿透能力,能夠穿透云霧、衣物、紙板等物體。自然界任何物體都會(huì)輻射毫米波波段的能量,且不同材質(zhì)、溫度的物體所輻射的毫米波能量不同,其中金屬物體和非金屬物體所輻射的毫米波能量差異明顯。毫米波無(wú)源成像系統(tǒng)利用人體和金屬物體輻射的毫米波能量的差異,實(shí)現(xiàn)被動(dòng)成像。該成像技術(shù)具有無(wú)輻射、非接觸式的特點(diǎn),對(duì)人體的健康和隱私具有很好的保護(hù)作用,能夠很好的滿足機(jī)場(chǎng)、車站、黨政機(jī)關(guān)等公共場(chǎng)所對(duì)人體安檢的應(yīng)用需求。本文依托相關(guān)的科研項(xiàng)目,綜合考慮到成像機(jī)制的性能差異性和可實(shí)現(xiàn)性、成像系統(tǒng)各硬件部件的相互關(guān)聯(lián)性、成像系統(tǒng)各參數(shù)指標(biāo)的相互制約性、以及總體系統(tǒng)的設(shè)備成本等因素,重點(diǎn)研究了毫米波無(wú)源成像系統(tǒng)的伺服掃描機(jī)構(gòu),及其控制單元的設(shè)計(jì)與實(shí)現(xiàn)。具體完成的工作如下:1.研究了毫米波無(wú)源成像系統(tǒng)的總體方案,分析了成像系統(tǒng)的兩種不同架設(shè)方案對(duì)相關(guān)參數(shù)的影響,并分析了兩種架設(shè)方案的優(yōu)缺點(diǎn)。2.研究了伺服掃描機(jī)構(gòu)相關(guān)參數(shù)之間的關(guān)聯(lián)性和制約性;根據(jù)伺服掃描轉(zhuǎn)臺(tái)機(jī)械結(jié)構(gòu)的差異,分析并設(shè)計(jì)了“梯形”和“正弦”兩種掃描特性曲線;針對(duì)這兩種掃描特性曲線,分別討論了掃描幀速率、成像視場(chǎng)高度、掃描峰值角速度和最大角加速度之間的制約關(guān)系,并據(jù)此來(lái)選取滿足系統(tǒng)指標(biāo)要求的合適的參數(shù)組合。3.研究了伺服掃描機(jī)構(gòu)的伺服電機(jī)、測(cè)角編碼器、機(jī)械傳動(dòng)方式等;根據(jù)總體系統(tǒng)對(duì)伺服掃描機(jī)構(gòu)的功能和指標(biāo)要求,完成了伺服掃描機(jī)構(gòu)總體實(shí)現(xiàn)方案的設(shè)計(jì),進(jìn)行了轉(zhuǎn)臺(tái)的設(shè)計(jì)與實(shí)現(xiàn)。4.設(shè)計(jì)并實(shí)現(xiàn)了伺服控制單元。根據(jù)系統(tǒng)對(duì)伺服控制單元的要求,完成了基于數(shù)字信號(hào)處理器DSP TMS320F28335的伺服控制板的設(shè)計(jì)與實(shí)現(xiàn),并完成了與系統(tǒng)其他硬件單元的通信調(diào)試;完成了伺服控制相關(guān)的軟件設(shè)計(jì)與編寫。5.針對(duì)實(shí)驗(yàn)室前期的成像系統(tǒng),以及項(xiàng)目組最新研制的透鏡天線、陣列通道等,設(shè)計(jì)并實(shí)現(xiàn)了“梯形”加減速二維掃描模型,完成了室內(nèi)外單通道成像實(shí)驗(yàn)。
[Abstract]:Millimeter wave has a strong penetration ability, can penetrate clouds, clothing, cardboard and other objects. Any object in nature can radiate the energy of millimeter wave band, and the millimeter wave energy of different material and temperature object is different, among which the millimeter wave energy of metal object and non-metallic object is obviously different. Millimeter wave passive imaging system makes use of the difference of millimeter wave energy between human body and metal object to realize passive imaging. The imaging technology has the characteristics of no radiation and non-contact, has a good protective effect on human health and privacy, and can meet the application needs of human security inspection in airports, stations, party and government organs and other public places. Based on the relevant scientific research projects, this paper takes into account the performance difference and realizability of imaging mechanism, the correlation of the hardware components of the imaging system, and the mutual restriction of the parameters and indexes of the imaging system. As well as the equipment cost of the overall system, the servo scanning mechanism of millimeter wave passive imaging system and the design and implementation of its control unit are studied in detail. The specific work accomplished is as follows: 1. The overall scheme of millimeter wave passive imaging system is studied, the influence of two different erection schemes of imaging system on the related parameters is analyzed, and the advantages and disadvantages of the two erection schemes are analyzed. 2. The correlation and restraint between the relevant parameters of the servo scanning mechanism are studied, and according to the difference of the mechanical structure of the servo scanning turntable, the scanning characteristic curves of "ladder" and "sine" are analyzed and designed. According to these two scanning characteristic curves, the constraints among scanning frame rate, imaging field of view height, scanning peak angular velocity and maximum angular acceleration are discussed respectively, and the appropriate parameter combination to meet the requirements of the system index is selected. 3. The servo motor, angle measuring encoder and mechanical transmission mode of servo scanning mechanism are studied. According to the function and index requirements of the servo scanning mechanism, the overall realization scheme of the servo scanning mechanism is designed, and the turntable is designed and realized. 4. The servo control unit is designed and implemented. According to the requirements of the system for the servo control unit, the design and implementation of the servo control board based on the digital signal processor DSP TMS320F28335 are completed, and the communication and debugging with other hardware units of the system are completed. The software design and programming of servo control are completed. 5. Aiming at the imaging system in the early stage of the laboratory, as well as the lens antenna and array channel newly developed by the project team, the "ladder" acceleration and deceleration two-dimensional scanning model is designed and implemented, and the indoor and outdoor single channel imaging experiment is completed.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN015

【共引文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陶玉貴;余紅英;喻潔;;基于DSP和ISP1581的USB數(shù)據(jù)采集系統(tǒng)設(shè)計(jì)[J];安徽師范大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年03期

2 汪祥;;基于DSP的微機(jī)線路保護(hù)裝置的研究[J];安陽(yáng)工學(xué)院學(xué)報(bào);2006年06期

3 趙長(zhǎng)海;萬(wàn)秋華;佘容紅;盧新然;何金其;梁立輝;杜穎財(cái);;24位絕對(duì)式光電編碼器數(shù)據(jù)采集系統(tǒng)[J];半導(dǎo)體光電;2010年03期

4 劉彪;申萍;王立德;王蘇敬;;基于SIP的大功率柴油機(jī)電控噴油系統(tǒng)的改進(jìn)[J];北京交通大學(xué)學(xué)報(bào);2007年05期

5 章百寶;張穎;;基于DSP技術(shù)的遙控武器站運(yùn)動(dòng)控制器[J];兵工自動(dòng)化;2012年06期

6 李小斌;李軍生;;伺服節(jié)能技術(shù)在注塑機(jī)上的應(yīng)用[J];寶雞文理學(xué)院學(xué)報(bào)(自然科學(xué)版);2010年04期

7 胡偉;彭可;涂春鳴;;基于TMS320F2812有源濾波控制器的設(shè)計(jì)[J];變流技術(shù)與電力牽引;2007年05期

8 羅寧;劉連根;王衛(wèi)安;譚勝武;;基于雙CPU的TSC控制器設(shè)計(jì)[J];變流技術(shù)與電力牽引;2008年01期

9 羅國(guó)永;曹懷志;曾明高;;三維電壓空間矢量控制在三相四橋臂逆變器中的應(yīng)用[J];變流技術(shù)與電力牽引;2008年02期

10 劉華東;郭育華;王衛(wèi)安;譚勝武;;一種混合型靜止無(wú)功補(bǔ)償裝置的設(shè)計(jì)及其應(yīng)用[J];變流技術(shù)與電力牽引;2008年02期

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1 陳艷;吳熙;王亦紅;陸靜;朱q，

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