数字式实时时钟自动校准的研究

Research of the Self timing of Digital Time Clocks

对于长时间运行的控制系统需周期性校准其时钟以消除积累走时误差。对数字式时钟误差进行分析，提出数字式时钟自动校准方法，即接收电台整点报时信号处理成校准脉冲，每２４小时自动校准时钟一次，消除时钟日差。自动校准数字式时钟系统模型的核心是ＭＣＳ－５１单片机，将硬件电路与软件技术相结合。

The time colck of a control system running continuously must be periodically rest so as to remove its accumulated errors. This paper analyses the errors of digital clocks and presents a method of selftime of it by receiving time signals from radio broadcast and changing them into timing pulls to remove the daily rate errors every 24 hours.The core of the mold of the self timing digital clock system is a MCS 51 single chip microcomputer.With the hardware and software technology the system realizes the automatic running without any accumulated daily rate errors.