等精度频率测试仪设计

等精度频率测试仪设计(任务书,开题报告12000字)
摘要
文章概述了几种测量频率的方法，介绍了不同方法测频的基本原理，并对几种测量频率的方法进行了比较详细的分析，详细讲述了他们的方法的优点和使用的局限。然后根据等精度测频法设计出等进度测频计。
文章介绍了EDA技术及相应的开发环境、所涉及的编程语言，简要介绍了单片机。文中着重分析了等进度测量频率的原理、误差、及影响精度的因素。运用等精度测量原理设计出一台等精度频率测量仪。借助了EDA技术完成频率计主要模块的实现，详细介绍了本设计的工作流程，每一个小部分实现的功能、原理以及设计实现的方法。设计采用FPGA加单片机组合的形式完成。通过仿真和实测试的方式完成设计验证。测试结果表明，设计逻辑正确，测量频率范围和精度达到了预期的目标。
关键词：等精度、EDA、频率计
 
ABSTRACT
This paper introduces several methods of measuring frequency, introduces the basic principle of frequency measurement of different methods, and makes a detailed analysis of several methods of measuring frequency, and details the advantages and limitations of their methods. And then according to the accuracy of frequency measurement method to design such as the progress of frequency measurement.

The article introduces the EDA technology and the corresponding development environment, the programming language involved, briefly introduces the microcontroller. In this paper, the principle, error and influencing factors of equal measurement frequency are analyzed emphatically. The use of precision measurement principle to design a precision frequency measurement instrument. With the help of EDA technology to complete the realization of the main module of the frequency meter, the design flow of each design, each part of the realization of the function, principles and design and implementation methods. Designed to use FPGA and single-chip combination of the form to complete. Through the simulation and real test to complete the design verification. Test results show that the design logic is correct, measuring the frequency range and accuracy to achieve the desired goal.
Key words：Equal precision、EDA、Frequency meter
  [来源：http://www.think58.com]

目录
第一章绪论    1
1.1 设计背景    1
1.2 频率计发展的现状    1
1.3 课题内容    2
第二章测量频率方法的介绍    3
2.1 直接测量法    3
2.2 等精度测量法    5
2.3 变换域法    6
2.4 转换法    7
第三章 EDA技术介绍    8
3.1 EDA 技术的发展    8
3.1.1 EDA概述    8
3.1.2 计算机辅助设计（CAD）阶段    8
3.1.3 计算机辅助设计（CAE）阶段    9

3.1.4 电子设计自动化EDA阶段    9
3.2 EDA设计特点    9
3.3 设计流程    10
3.4 Quartus II软件    10
3.4.1 Quartus II软件介绍    10
3.4.2 Quartus II使用流程    11
3.5 SignalTap II 软件    11
3.5.1 SignalTap II 介绍    11
3.5.2 SignalTap II 使用流程    12
3.6 Verilog语言综述    13
第4章基于等精度测量原理的频率计设计    14
4.1 设计目标    14
4.2 整体方案    14
4.3 设计方案    15
4.3.1 信号整形模块    15
4.3.2 标准信号模块    18
4.3.3 计数模块    18
4.3.4 单片机主控    19
4.3.5 SPI通信    21
4.4 测试、结果    22
4.4.3 实物测试    22
4.4.4 结果分析、讨论    22

[资料来源：THINK58.com]

4.4.5 总结    22
第5章前景和展望    23
参考文献    24
附录一FPGA计数代码    25
致谢    27