超宽带探地雷达设计
发布时间：2019-02-18 13:12
【摘要】：探地雷达(GPR)是一种用高频电磁波来确定介质内部物质分布情况的探测方法。超宽带(UWB)雷达指相对工作带宽大于或等于其中心频率20%的雷达。超宽带探地雷达结合探地雷达与超宽带雷达的特点实现对地探测。本课题主要研究的就是超宽带探地雷达整个系统的实现。此雷达应用广泛,在军用和民用两方面都很适用。 首先,论文介绍了超宽带探地雷达的概念及发展趋势。随后介绍超宽带雷达工作原理,进行了超宽带探地雷达系统的整体方案设计,然后分别详细介绍了研究的几个部分：1、超宽带雷达的天线设计,通过三维立体仿真软件HFSS仿真优化,选定天线形状和尺寸,设计了原计划阿基米德螺旋天线,实现了峰峰值电压为1.76V,脉冲宽度为1.432ns的双极性脉冲的发射与接收。2、超宽带雷达的电路设计,包括发射电路设计,利用雪崩效应,以三极管MRF5812为核心产生双极性脉冲作为发射脉冲；超宽带雷达的接收电路设计,利用TDC芯片确定目标距离,通过延时电路,限幅电路,积分电路等信号处理最终输入控制器MSP430,显示信息。3、超宽带雷达的软件设计,包括触发脉冲控制程序；延时芯片AD9501和TDC控制程序、信号采集及处理程序等。 最后,论文介绍了超宽带探地雷达系统的安装和调试,主要包括发射电路和接收电路的调试。
[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.
【学位授予单位】：西安工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN959
本文编号：2425871
[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.
【学位授予单位】：西安工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN959
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