摘要
为了能够精确测量频率等参数,提出了一种基于单片机的数字频率计的设计方法,以AT89S51单片机作为系统的主控芯片,待测信号经过放大整形电路和分频后,输入到单片机中进行采样测量,最后通过显示和存储电路将结果显示并存储起来,可以测量待测信号的频率、周期、脉冲宽度和占空比等参数。并基于Multisim仿真软件设计了仿真电路,结合keil软件进行了软硬联调,结果表明该电路能精确的测量待测信号的各种参数,频率测量误差低于0.05%,测量范围为1Hz^1MHz,仿真效果良好。
In order to accurately measure parameters such as frequency,This paper provides a design method of digital frequency meter based on single chip microcontroller. After amplification and shaping circuit and frequency dividing circuit, the signal is sampled by AT89S51 which is the main control chip of the system. And the measure results are displayed and stored. The system can measure, many parameters such as frequency,period,pulse width and duty cycle. Simulation circuit was also designed base on the Multisim simulation software. Finally finish the software and hardware joint debugging combined with the keil software. Result show that the circuit can measure all parameters accurately, and the frequency error is less than 0.05% ,and the measuring of 1 Hz-1 MHz. The simulation result is good.
出处
《电子设计工程》
2017年第1期140-142,147,共4页
Electronic Design Engineering
关键词
频率计
单片机
MULTISIM
仿真
frequency meter
single chip microcontroller
Multisim
simulation
