摘要
文章实现了市电频率实时监测器的设计。该监视器设计以单片机AT89C2051为核心,应用单片机的算术运算和控制功能并采用LED数码管实时地显示所测频率。使用高效的快速转换算法和用来测量信号多倍周期的分频电路计算信号频率,由单片机将数据送到显示部分电路,数据处理后给出电网电压的频率,大约250ms完成一次更新,测试精度达到0.01Hz,保证了系统的测频精度和实时性。
A real-time detector of power frequency is presented.Based on the operation and control of MCU AT89C2051,the power frequency detected is displayed by nixie tube.The highly effective transferring algorithm and the multi-cycle dividing frequency circuit were used to count signal frequency.Display circuit process the data from MCU and display the frequency value every 250ms,and the precision reach 0.01Hz.The power frequency detector presents performance of accurately and displays in time.
出处
《电子与封装》
2010年第8期44-47,共4页
Electronics & Packaging
关键词
单片机
市电频率
实时监测
MCU
real-time detector
power frequency
