【摘要】：探地雷達(GPR)是一種用高頻電磁波來確定介質(zhì)內(nèi)部物質(zhì)分布情況的探測方法。超寬帶(UWB)雷達指相對工作帶寬大于或等于其中心頻率20%的雷達。超寬帶探地雷達結(jié)合探地雷達與超寬帶雷達的特點實現(xiàn)對地探測。本課題主要研究的就是超寬帶探地雷達整個系統(tǒng)的實現(xiàn)。此雷達應(yīng)用廣泛,在軍用和民用兩方面都很適用。 首先,論文介紹了超寬帶探地雷達的概念及發(fā)展趨勢。隨后介紹超寬帶雷達工作原理,進行了超寬帶探地雷達系統(tǒng)的整體方案設(shè)計,然后分別詳細介紹了研究的幾個部分：1、超寬帶雷達的天線設(shè)計,通過三維立體仿真軟件HFSS仿真優(yōu)化,選定天線形狀和尺寸,設(shè)計了原計劃阿基米德螺旋天線,實現(xiàn)了峰峰值電壓為1.76V,脈沖寬度為1.432ns的雙極性脈沖的發(fā)射與接收。2、超寬帶雷達的電路設(shè)計,包括發(fā)射電路設(shè)計,利用雪崩效應(yīng),以三極管MRF5812為核心產(chǎn)生雙極性脈沖作為發(fā)射脈沖；超寬帶雷達的接收電路設(shè)計,利用TDC芯片確定目標(biāo)距離,通過延時電路,限幅電路,積分電路等信號處理最終輸入控制器MSP430,顯示信息。3、超寬帶雷達的軟件設(shè)計,包括觸發(fā)脈沖控制程序；延時芯片AD9501和TDC控制程序、信號采集及處理程序等。 最后,論文介紹了超寬帶探地雷達系統(tǒng)的安裝和調(diào)試,主要包括發(fā)射電路和接收電路的調(diào)試。
[Abstract]:Ground penetrating radar (GPR) (GPR) is a method to determine the distribution of material in medium by high frequency electromagnetic wave. Ultra-wideband (UWB) radar refers to a radar whose relative operating bandwidth is greater than or equal to its central frequency of 20%. UWB GPR combines the characteristics of GPR and UWB radar to achieve ground detection. The realization of the whole system of UWB GPR is studied in this paper. This radar is widely used and suitable for both military and civilian applications. Firstly, the concept and development trend of UWB GPR are introduced. Then the working principle of UWB radar is introduced, and the whole scheme of UWB ground penetrating radar system is designed. Then several parts of the research are introduced in detail: 1. The antenna design of UWB radar. Through the optimization of three-dimensional simulation software HFSS, the shape and size of antenna are selected, and the original planned Archimedes spiral antenna is designed. The transmission and reception of bipolar pulse with peak voltage of 1.76 V and pulse width of 1.432ns are realized. The circuit design of UWB radar, including the design of transmitting circuit, using avalanche effect, using transistor MRF5812 as the core to generate bipolar pulse as the transmission pulse; UWB radar receiving circuit design, using TDC chip to determine the target distance, through delay circuit, limiting circuit, integration circuit and other signal processing final input controller MSP430, display information. 3, UWB radar software design, Including trigger pulse control program; Delay chip AD9501 and TDC control program, signal acquisition and processing program. Finally, this paper introduces the installation and debugging of UWB ground penetrating radar system, including the debugging of transmitting circuit and receiving circuit.
【學(xué)位授予單位】：西安工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN959

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