基于FPGA的微弱信号采集与分析方法的研究

发布时间：2018-03-30 22:03

本文选题：微弱信号　切入点：FPGA　出处：《哈尔滨理工大学》2014年硕士论文

【摘要】：数字技术的出现与应用为人类带来了深远的影响，随着数字技术研究的逐渐深入，信号的采集与分析方法的研究也逐步深入，然而无论是日常应用领域还是科学研究领域，很多时候需要提取、处理淹没在大量强噪声中的微弱信号，微弱信号的采集与分析是将有用的信号从噪声中提取出来的一门新兴学科，是一种专门与噪声作斗争的技术。因此，如何应用数字技术实现在众多噪声背景下采集到微弱信号并对其进行分析处理已成为目前信号采集与分析领域的研究热点之一。本文设计了一款微弱信号采集系统，该系统是以ATERA公司的FPGA芯片EP4CW15F17C8作为微弱信号采集系统的核心芯片。该系统的硬件部分在设计上采用了模块化处理，设计了FPGA外围电路设计模块、微弱信号输入电路模块、微弱信号放大电路模块、AD外围电路模块、SRAM外围电路设计模块、电源管理电路模块、网口通讯电路设计模块和接口电路模块，其中接口电路模块包括JTAG接口电路模块、VGA接口电路模块、按键接口电路模块等，，并完成了PCB绘制。再次，在微弱信号采集系统硬件设计的基础上，详细介绍了微弱信号采集系统的软件系统的构架以及实现方案，系统软件设计部分也采用了模块化处理，包括按键模块、AD模块、FIFO模块、FIR滤波模块、SRAM模块、VGA等模块的设计，并对各个模块的状态转换图、RTL视图、输入输出管脚视图等进行了绘制，在此基础上应用HDL语言专门仿真软件Modelsim对各个模块进行了仿真。本文根据微弱信号的特点设计了一款微弱信号采集系统，并给出了微弱信号采集系统的整个硬件电路和软件模块，与此同时对微弱信号的采集以及分析方法进行了深入的探讨，对应用FPGA采集微弱信号的人员具有一定的参考作用。
[Abstract]:The emergence and application of digital technology have brought profound influence to human beings. With the development of digital technology, the research of signal acquisition and analysis methods has been gradually deepened, but no matter in the field of daily application or in the field of scientific research,In many cases, it is necessary to extract and deal with weak signals submerged in a large number of strong noises. The acquisition and analysis of weak signals is a new subject that extracts useful signals from noise, and is a special technology to combat noise.Therefore, how to use digital technology to realize the acquisition and analysis of weak signals in many noise backgrounds has become one of the research hotspots in the field of signal acquisition and analysis.In this paper, a weak signal acquisition system is designed. The system uses FPGA chip EP4CW15F17C8 of ATERA Company as the core chip of the weak signal acquisition system.In the hardware part of the system, modularization is adopted in the design. The peripheral circuit design module of FPGA, the weak signal input circuit module, the weak signal amplifying circuit module and the AD peripheral circuit module are designed.Power management circuit module, network interface communication circuit design module and interface circuit module. The interface circuit module includes JTAG interface circuit module, key interface circuit module and PCB drawing.Thirdly, on the basis of the hardware design of the weak signal acquisition system, the software architecture and implementation scheme of the weak signal acquisition system are introduced in detail. The software design part of the system also adopts modularization processing.It includes the design of key module, AD module, FIFO module, Fir filter module, SRAM module, VGA and so on, and draws the state transition diagram of each module and RTL view, input and output pin view, etc.On this basis, the special simulation software Modelsim of HDL language is used to simulate each module.It has certain reference function for the people who use FPGA to collect weak signals.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN911.7

【引证文献】