X波段线性调频物位雷达系统设计研究

发布时间：2019-05-17 03:00

【摘要】：无论是在现代的生活中还是在现代工业生产中,对距离的测量提出了越来越高的要求,而在很多工作生产自动控制与智能系统中,距离的测量又是不可或缺的。传统的距离测量方法已经不能满足各种产场合测距的需要,距离的自动实时获取才是现在所需要的。X波段线性扫频雷达具有测距精确,测量速度快的优点,可以广泛应用在汽车防撞系统、物位雷达、雷达高度计等领域,为生活和工业生产提供方便。本文完成了一种X波段线性扫频物位雷达测量系统的总体技术方案论证和硬件系统搭建工作。所设计雷达系统主要用于工业自动化生产中物位的测量,相对于现有系统方案,本文所提出的设计方案具有高精度、智能化和测速快等技术优点。在系统硬件实现工作中,根据技术方案,分析选择了 Virtex-5系列FPGA作为核心处理器件,并以STM32F407作为辅助控制器、HMC703作为核心器件设计的线性扫频源与发射机接收机,设计加工了硬件系统,并在实验室环境和外场环境中进行了测试,实现了 X波段FMCW物位雷达设计方案中的功能要求。首先,介绍了所研究的线性扫频物位雷达的应用背景、国内外发展现状,分析了X波段线性扫频物位雷达的必要性;其次,详细描述了 X波段线性扫频物位雷达工作原理、测量方法、拟实现的功能和技术要求;再次,根据线性扫频雷达的工作原理设计了一种X波段线性扫频物位雷达的系统方案,重点论证了发射机与接收机中线性扫频源、功放、LNA、混频器与中频数字信号处理模块的设计方法;最后,对所设计X波段线性扫频物位雷达原理样机进行了实验测试,获得了多组数据,并对数据进行了分析与处理;实验数据表明所设计的X波段线性扫频物位雷达,线性扫频源可以发射线性度很高的扫频信号,接收电路可以接收到回波信号,并通过与发射信号混频得到了与距离相关的中频信号,便于后续数据处理。本文设计开发的具有较高精度的X波段线性扫频物位雷达,可以对进一步研制相关雷达系统提供一些技术参考。
[Abstract]:No matter in modern life or in modern industrial production, the measurement of distance has been put forward higher and higher requirements, and in many automatic control and intelligent systems of work and production, distance measurement is indispensable. The traditional range measurement method can no longer meet the needs of ranging in various production situations, and the automatic real-time acquisition of range is needed at present. X-band linear sweep radar has the advantages of accurate ranging and fast measurement speed. It can be widely used in automobile collision avoidance system, level radar, radar altimeter and other fields, which provides convenience for life and industrial production. In this paper, the overall technical scheme demonstration and hardware system construction of an X-band linear sweep radar measurement system are completed. The designed radar system is mainly used for the measurement of material level in industrial automation production. Compared with the existing system scheme, the design scheme proposed in this paper has the technical advantages of high precision, intelligence and fast speed measurement. In the hardware implementation of the system, according to the technical scheme, the Virtex-5 series FPGA is analyzed and selected as the core processing device, and STM32F407 is used as the auxiliary controller and HMC703 as the core device to design the linear sweep source and transmitter receiver. The hardware system is designed and processed, and the test is carried out in the laboratory environment and the external field environment, and the functional requirements of the X-band FMCW level radar design scheme are realized. Firstly, the application background of linear sweep level radar is introduced, and the development status at home and abroad is introduced, and the necessity of X-band linear sweep level radar is analyzed. Secondly, the working principle, measurement method, function and technical requirements of X-band linear sweep radar are described in detail. Thirdly, according to the working principle of linear sweep radar, a system scheme of X-band linear sweep level radar is designed, and the linear sweep source, power amplifier and LNA, in transmitter and receiver are demonstrated in detail. The design method of mixer and if digital signal processing module; Finally, the designed prototype of X-band linear sweep radar is tested, and many sets of data are obtained, and the data are analyzed and processed. The experimental data show that the designed X-band linear sweep radar can send the sweep signal with high radiality, and the receiving circuit can receive the echo signal. The intermediate frequency signal related to distance is obtained by mixing with the transmitted signal, which is convenient for subsequent data processing. The X-band linear sweep level radar with high accuracy designed and developed in this paper can provide some technical references for the further development of related radar systems.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN957.51

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