基于单片机的数字频率计设计.doc
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2022-12-03
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摘要
本方案主要以单片机为核心，主要分为时基电路，逻辑控制电路，放大整形电路，
闸门电路，计数电路，锁存电路，译码显示电路七大局部，设计以单片机为核心，被
测信号先进入信号放大电路进展放大，再被送到波形整形电路整形，把被测的正弦波
或者三角波整形为方波。利用单片机的计数器和定时器的功能对被测信号进展计数。
编写相应的程序可以使单片机自动调节测量的量程，并把测出的频率数据送到显示电
路显示。
本设计以 89C51 单片机为核心，应用单片机的算术运算和控制功能并采用 LED
数码显示管将所测频率显示出来。系统简单可靠、操作简易，能根本满足一般情况下
的需要。既保证了系统的测频精度，又使系统具有较好的实时性。本频率计设计简洁，
便于携带，扩展能力强，适用 X 围广。
[关键词]单片机：运算；频率计；LED 数码管
Abstract
The program mainly microcontroller as the core, are divided into time-base circuit, the
logic control circuit, amplifier shaping circuit, the gate circuit, the counting circuit, latch
circuit, decoding circuit most of the seven shows, design a microcontroller as the core, the
measured signal the first amplifier to amplify the ining signal, and then was sent to the
waveform shaping circuit surgery, the measured sine wave or triangle wave shaping as a
square wave. Counter and timer microchip features of the signal count. Write the
corresponding program can automatically adjust the measurement range of SCM, and the
frequency of the measured data to the display circuit displays.
The design of the 89C51 microcontroller core, microcontroller applications and control
functions and arithmetic operations with LED digital display tube to the measured frequency
is displayed. System is simple, reliable, easy to operate and can basically meet the general
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