SMART CLOCK - A NEW TIME
SMART CLOCK - A NEW TIME
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DOI：
10.1109/19.199433
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发表时间：
1992-12-01
影响因子：
5.6
通讯作者：
LEVINE, J
中科院分区：
文献类型：
--
作者：
WEISS, MA;ALLAN, DW;LEVINE, J
智能时钟是NIST的一项正在申请的专利，它为任何时钟提供了一种可能性，使其能够以最少的测量自动同步到外部标准。这一概念涵盖了从腕表和家用钟表到高精度钟表的专业领域的一系列应用。智能时钟通过将时钟或振荡器与外部标准进行比较来提高其准确性或稳定性。智能时钟算法使用最佳估计和预测来对振荡器的输出进行校正，从而将时间或频率精度或稳定性的任何组合保持在指定的限值内。该算法决定何时需要外部测量来保持所需的精度或稳定性。我们在这里介绍了智能时钟系统的教程描述，以及如何使用电话线测量将简单的时钟保持为1秒的示例。
The Smart Clock, a pending patent of NIST, opens up the possibility for any clock to be automatically synchronized to an external standard with a minimum of measurements. The concept covers a range of applications from wrist watches and household clocks to the specialized world of high-accuracy clocks. The Smart Clock enhances the accuracy or stability of a clock or oscillator by characterizing it against an external standard. The Smart Clock algorithm uses optimal estimation and prediction to apply a correction to the output of the oscillator, maintaining any combination of time or frequency accuracy or stability within specified limits. The algorithm decides when external measurements are necessary to maintain the desired accuracy or stability. We present here a tutorial description of the Smart Clock system and an example of how it could be used to maintain a simple clock to 1 s using measurements over the telephone lines.