基于FPGA的北斗驯服铷原子频标装置的研制

为了提高铷原子钟频率的准确度和稳定度,设计了基于FPGA技术的多路输出北斗驯服铷原子频标装置。装置采用粗测和细测的时间间隔测量方法实现铷原子频率的驯服和时间跟踪与同步。采用模块化设计和编程,提高了装置的通用性和可移植性。以铯原子钟时间频率为参照,利用该装置对铷原子钟驯服前后的数据进行多次比对测试,结果表明其频率的相对准确度达到了1.5×10^-13,相对稳定度达到6.97×10^-13,与驯服之前相比,铷原子钟频率的准确度和稳定度均得到大幅提高和改善。

Development of BeiDou Taming Rubidium Frequency Standard Device Based on FPGA

In order to improve the accuracy and stability of the rubidium atomic clock frequency,equipment with multi output GNSS taming rubidium atomic frequency standard is designed based on FPGA technology. The taming and time tracking and synchronization of the rubidium atomic frequency are realized by the method of measuring the time interval using the rough and the fine measurements. Modular design and programming are used to improve the generality and transferability of the device. The data of rubidium atomic clock before and after taming were compared and tested many times taking the time and frequency of cesium atomic clock as reference. The results show that the relative accuracy of the device frequency reaches 1. 5 × 10^-13 and relative stability runs up to 6. 97 × 10^-13.