【摘要】 守时系统由时频标准、时频信号产生、时差测量、稳定度检测和远程时间频率比对等分系统组成。实验数据均来自国家级守时中心的实测数据,数据处理算法采用国际计量局推荐的自由原子时算法ALGOS。远程时间比对系统采用卫星共视法对本地虚拟原子钟、远程国家级守时中心原子钟时间测量结果进行比对,以确定本地虚拟原子钟的时间计量准确度。整个虚拟实验在Unity实时3D平台上采用微软C#语言开发而成。经过在"检测技术"课程中实际应用,效果良好,达到了让学生理解SI基本单位的量子计量原理,锻炼学生实验动手操作能力,提高复杂测量数据的处理和分析能力的目的。更多还原

【Abstract】 Design and application of virtual experiment of time keeping and remote time comparison based on atomic frequency standard are introduced. The time keeping system is composed of time-frequency standard subsystem, time-frequency signal generation subsystem, time difference measurement subsystem, stability detection subsystem and remote time-frequency calibration system. The experimental data are all from the real measurement data of the national time keeping center. The algorithm ALGOS which is recommended by the International Bureau of Metrology(BIPM) is applied for data processing. The remote time calibration system uses the satellite common-view method to calibrate the time measurement results of the local virtual atomic clocks and that of the remote national time keeping center, so as to determine the time measurement accuracy of the local virtual atomic clocks. The whole virtual experiment is developed on unity real-time 3 D platform with Microsoft C# language. The practical application in the course of “detection technology” shows that the teaching effect is good. The goals to let the students understand the quantum measurement principle of SI basic unit, to train the students’ experimental ability, and to improve the ability of processing and analyzing complex measurement data have been achieved.更多还原