【摘要】：毫米波具有很強的穿透能力,能夠穿透云霧、衣物、紙板等物體。自然界任何物體都會輻射毫米波波段的能量,且不同材質、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,實現被動成像。該成像技術具有無輻射、非接觸式的特點,對人體的健康和隱私具有很好的保護作用,能夠很好的滿足機場、車站、黨政機關等公共場所對人體安檢的應用需求。本文依托相關的科研項目,綜合考慮到成像機制的性能差異性和可實現性、成像系統(tǒng)各硬件部件的相互關聯(lián)性、成像系統(tǒng)各參數指標的相互制約性、以及總體系統(tǒng)的設備成本等因素,重點研究了毫米波無源成像系統(tǒng)的伺服掃描機構,及其控制單元的設計與實現。具體完成的工作如下:1.研究了毫米波無源成像系統(tǒng)的總體方案,分析了成像系統(tǒng)的兩種不同架設方案對相關參數的影響,并分析了兩種架設方案的優(yōu)缺點。2.研究了伺服掃描機構相關參數之間的關聯(lián)性和制約性;根據伺服掃描轉臺機械結構的差異,分析并設計了“梯形”和“正弦”兩種掃描特性曲線;針對這兩種掃描特性曲線,分別討論了掃描幀速率、成像視場高度、掃描峰值角速度和最大角加速度之間的制約關系,并據此來選取滿足系統(tǒng)指標要求的合適的參數組合。3.研究了伺服掃描機構的伺服電機、測角編碼器、機械傳動方式等;根據總體系統(tǒng)對伺服掃描機構的功能和指標要求,完成了伺服掃描機構總體實現方案的設計,進行了轉臺的設計與實現。4.設計并實現了伺服控制單元。根據系統(tǒng)對伺服控制單元的要求,完成了基于數字信號處理器DSP TMS320F28335的伺服控制板的設計與實現,并完成了與系統(tǒng)其他硬件單元的通信調試;完成了伺服控制相關的軟件設計與編寫。5.針對實驗室前期的成像系統(tǒng),以及項目組最新研制的透鏡天線、陣列通道等,設計并實現了“梯形”加減速二維掃描模型,完成了室內外單通道成像實驗。
[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.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN015

【共引文獻】

相關期刊論文 前10條

1 陶玉貴;余紅英;喻潔;;基于DSP和ISP1581的USB數據采集系統(tǒng)設計[J];安徽師范大學學報(自然科學版);2011年03期

2 汪祥;;基于DSP的微機線路保護裝置的研究[J];安陽工學院學報;2006年06期

3 趙長海;萬秋華;佘容紅;盧新然;何金其;梁立輝;杜穎財;;24位絕對式光電編碼器數據采集系統(tǒng)[J];半導體光電;2010年03期

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

5 章百寶;張穎;;基于DSP技術的遙控武器站運動控制器[J];兵工自動化;2012年06期

6 李小斌;李軍生;;伺服節(jié)能技術在注塑機上的應用[J];寶雞文理學院學報(自然科學版);2010年04期

7 胡偉;彭可;涂春鳴;;基于TMS320F2812有源濾波控制器的設計[J];變流技術與電力牽引;2007年05期

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

9 羅國永;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用[J];變流技術與電力牽引;2008年02期

10 劉華東;郭育華;王衛(wèi)安;譚勝武;;一種混合型靜止無功補償裝置的設計及其應用[J];變流技術與電力牽引;2008年02期

相關會議論文 前10條

1 陳艷;吳熙;王亦紅;陸靜;朱q，

本文編號：2497185