基于单片机的频率特性测试仪设计大学毕设论文.doc

基于单片机的频率特性测试仪 1 基于单片机的频率特性测试仪摘要在电子技术里,频率是最基本参数之一,并且与很多电参量的测量方案、测量结果都有密切关系,因而频率的测量就显得更为重要。频率计可以用纯硬件的电路搭制。其中包括信号输入、信号放大、信号选择、时钟提供、数据显示等功能模块。为能实现智能化的计数测频,实现一个宽领域、高精度的频率计,有效的方法就是将单片机用于频率计的设计当中。本论文介绍以 51单片机作为核心器件。由于本设计采用了模块化的设计方法, 能提高测量频率的范围。本次设计包括硬件画图与软件程序编写。关键词:测量;频率计;单片机;汇编基于单片机的频率特性测试仪 2 FREQUENCY CHARATERISTIC TEST INSTRUMENT BAS ED ON MCU ABSTRAC Among electronic technology, frequency is one of the most basic parameters,and result of measuring have a very close relation toa lotof electric parameters, so the measurement of frequency seems even more important. Frequency counter can take t he system with pure hardware circuitry. It includes the signal input, signal amplificati on, signal selection, the clock provides the data display modules. In order to realize the counting of intellectualityexamines frequently, realize a wide-range, high-accuracy cymometer, an effective method is to use one-puter for the design of the cy mometer. Thissubject mends regarding 51 Single-puter as the key devi ce, include signal input, signalamplify, signal choose, clock offer, data person who re veal function digital design method of cymometer of module still in har dware circuit of the cymometer is drawing with Protel mapping software,the one-puter control procedure of the software part, wrote the assembler language. Beca use originally design the design method to adopt module, improve the range of meas uring frequency. And the drawing of this design,including hardware and software pro gramming Key words: Measurement ; Cymometer ; Single-puter ; Compilation 基于单片机的频率特性测试仪 3 目录 1引言..................................................................................................................................... 1 数字频率计的发展和意义.......................................................................................... 1 数字频率国内外的发展形势...................................................................................... 2 2系统总体设计.............................................