针对传统天文测量授时系统结构复杂、操作繁琐、便携性差等缺点,研究开发了一种基于DS12C887温补时钟芯片的功耗低、体积小且携带方便的天文授时系统.简要介绍了系统的基本构成和主要部件的功能特性及各种参数.介绍了授时系统的计时原理和工作流程,介绍了授时系统比时平台的构成以及比时的基本原理.做了大量的实验测试,分析了授时系统的稳定性和精度,收集了22d的时间比对实验数据.经实验验证,授时系统计时精度高,运行稳定,自动化程度高,可方便运用于野外天文测量与其他时间服务.%The timing system in traditional astronomic surveying have many flaws. Its structure is complicated,its operation is fussy and its portability is poor. A timing system based on temperature compensation clock chip DS12C887 is designed. The structure and identities of basic components are briefly introduced. The theory of measuring time and working process are introduced. The framework and principium of time compare subsidiary system are introduced. A lot of experiments are carried out and 22 d time error data is recorded, to analyze the precision of the timing system. Those experiments prove that the timing system is accurate, steady, highly automatic. It can be used for outdoor astronomic surveying and other time services.
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