基于动态线性相位处理的新型频率改正器研究  

Research on new frequency corrector based on dynamic linear phase processing

作　　者：王佳婧 屈八一[1] 曲鑫 周渭[2] Wang Jiajing;Qu Bayi;Qu Xin;Zhou Wei(School of Infomiation Engineering,Chang,an University,Xi'an 710064,China;School of Mechanical and Electrical Engineering,Xi’an University of Electronic Technology,Xi’an 710071,China)

机构地区：[1]长安大学信息工程学院,西安710064 [2]西安电子科技大学机电工程学院,西安710071

出　　处：《电子测量与仪器学报》2021年第3期181-186,共6页Journal of Electronic Measurement and Instrumentation

基　　金：长安大学研究生科研创新实践(300103703051)项目资助。

摘　　要：针对现有频率改正器很难改正频率存在微小差异并随时间动态改变的两信号。提出一种高精度动态频率改正技术,实现对随时间不断变化的两不同频信号之间的相位差测量及控制,并达到10-12量级的微小频率改正。设计采用ADC充当数字检相器,利用边沿效应对大量线性区有效数据进行采样;经现场可编程逻辑门阵列(FPGA)和单片机对数据进行存储和预处理后,电压控制—恒温晶体振荡器(VC-OCXO)根据单片机提供的压控电压对频率进行改正。最终实验结果表明新型频率改正器具有低噪声、高分辨率、高转换效率、高稳定性及高可调节性等特点。In view of the fact that it is difficult for the existing frequency corrector to correct the two signals whose frequencies have a small frequency difference and changes dynamically over time, a high-precision dynamic frequency correction technology is proposed, to achieve the measurement and control of the phase difference between two different frequency signals that change over time and achieve a small frequency correction of the order of 10-12. The design mainly uses the ADC as a digital phase detector function to sample a large amount of effective data in the linear region using the edge effect. The FPGA and the microcontroller preprocess and store the data. The VC-OCXO corrects the frequency according to the voltage-controlled voltage provided by the single-chip microcomputer after the data is stored and preprocessed. The final experimental results show that the new frequency corrector has the characteristics of low noise, high resolution, high conversion efficiency, high stability, and high adjustability.

关 键 词：相位差测量 ADC 频率改正 时间同步 

分 类 号：TH714[机械工程—测试计量技术及仪器]