基于单片机的相位差测试仪的研究.doc

基于单片机的相位差测试仪的研究 摘要 提出了一种基于8051 单片机开发的低频数字相位差测量仪的设计。系统以单片机8051 及计数器，显示管为核心, 构成完备的测量系统。可以对1Hz～ 1000Hz 频率范围的信号进行频率、相位等参数的精确测量, 测相绝对误差不大于1°采用数码管显示被测信号的频率、相位差。硬件结构简单, 程序简单可读写性强,软件采用汇编语言实现, 效率高。与传统的电路系统相比, 其有处理速度快、稳定性高、性价比高的优点。 关键词: 相位差；单片机； 计数器；数码显示管 Designs of Low frequency Digital Phase Measurement Based on Single Chip Abstract A new kind of low - frequency digital phase measurement instrument is residented which is based on 8051.This is a complete system whose core is based on single chip 8051 and arithmometer and charactron. It may measure the frequency and phase of the signal which begin from 1 Hz to 1000Hz, absolute error is not more than 1° The data are displayed on numeral displayer. Hardware structure is simple and software is realized by compiling language. Compared with traditional circuit, it has many advantages of faster processing speed, good stability and high ratio between property and price. Keyword: phase difference； single-chip computer；. Arithmometer； charactron tube 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc137613417 第一章 绪论 PAGEREF _Toc137613417 \h 3 HYPERLINK \l _Toc137613418 1.1背景介绍 PAGEREF _Toc137613418 \h 3 HYPERLINK \l _Toc137613419 1.2本设计的内容要求及方法 PAGEREF _Toc137613419 \h 4 HYPERLINK \l _Toc137613420 第二章 小信号处理的构成及基本原理 PAGEREF _Toc137613420 \h 4 HYPERLINK \l _Toc137613421 2.1　信号处理模块 PAGEREF _Toc137613421 \h 5 HYPERLINK \l _Toc137613422 2.2.1数字式相位测量仪 PAGEREF _Toc137613422 \h 5 HYPERLINK \l _Toc137613423 2.2.2.移相网络 PAGEREF _Toc137613423 \h 6 HYPERLINK \l _Toc137613424 2.2.3信号发生器 PAGEREF _Toc137613424 \h 7 HYPERLINK \l _Toc137613425 2.3方案细化 PAGEREF _Toc137613425 \h 8 HYPERLINK \l _Toc137613426 2.3.1、数字式相位测量仪 PAGEREF _Toc137613426 \h 8 HYPERLINK \l _Toc137613427 2.3.2信号发生器 PAGEREF _Toc137613427 \h 9 HYPERLINK \l _Toc137613428 2.4原理图分析及各参数设置 PAGEREF _Toc137613428 \h 10 HYPERLINK \l _Toc137613429 第三章 计数部分的构成和原理 PAGEREF _Toc137613429 \h 11 HYPERLINK \l _Toc137613430 3.1测相部分 PAGEREF _Toc137613430 \h 11 HYPERLINK \l _Toc137