摘要：数字频率计是一种基本的测量仪器。它被广泛应用于航天、电子、测控等领域，还被应用在计算机及各种数学仪表中。一般采用十进制数字显示被测信号的频率。数字频率计的基本功能是测量正弦信号，方波信号以及其他各种单位时间内变化的物理量。由于其使用十进制数显示，测量迅速精确，显示直观，所以经常被用来使用。 84758
本文主要介绍数字频率计的设计和调试，本设计基于STC89C52单片机为平台，基本原理是通过STC89C52单片机进行频率的采集和分析，再通过程序使其显示在LCD1602的液晶显示屏上，通过液晶显示屏，让使用者能够直观的看到当前的输入频率是多少。
毕业论文关键词：单片机；LCD显示屏；测量
The design of digital frequency meter
Abstract: Digital frequency meter is a kind of basic measuring instrument。 It is widely used in aerospace, electronics, measurement and control, and other fields, has been used in the computer and various mathematical instrument。 Generally USES a decimal number, according to the measured signal frequency。 The basic function is to measure the sine signal, square wave signals, and other physical quantities of various kind of bad per unit time。 Due to its use decimal number display, measurement precision rapidly, direct display, it often is used to use。
This paper mainly introduce the design and debugging of digital frequency meter, this work is based on STC89C52 single-chip computer as the platform, the basic principle is through the STC89C52 single-chip microcomputer frequency acquisition and analysis, through the program to make it displayed in the Liquid Crystal Display 1602 LCD screen, through the LCD screen, let users can directly see what is the current input frequency。
Key Words: Micor-computer； LCD screen；Measure
目 录
摘 要 1
引言 2
1。 绪论 2
1。1 频率计的概述 2
1。3 数字频率计的种类 3
2。 总体方案设计 4
2。1 数字频率计的设计内容 4
2。2 测频原理 4
2。3 频率计设计总体思路 4
3。 硬件设计 5
3。1 信号放大模块 5
3。2 信号整形模块 6
3。3 分频模块 7
3。4 单片机控制模块 8
3。4。1 STC89C52单片机介绍 8
3。4。2 STC89C52单片机最小系统设计 STC89C52单片机数字频率计的设计+代码+电路图:http://www.youerw.com/zidonghua/lunwen_100777.html