Measurement and control from frequency to phase based on virtual signal reconstruction

Zhiqi Li; Wei Zhou; Jingbiao Chen; Lina Bai; Faxi Chen; Longfei Xu; Xiaoxia Ge; Miao Miao

doi:10.1063/1.5019288

Measurement and control from frequency to phase based on virtual signal reconstruction

Rev Sci Instrum. 2018 Jan;89(1):015112. doi: 10.1063/1.5019288.

Authors

Zhiqi Li¹, Wei Zhou¹, Jingbiao Chen², Lina Bai¹, Faxi Chen¹, Longfei Xu¹, Xiaoxia Ge¹, Miao Miao¹

Affiliations

¹ School of Electro-Mechanical Engineering, Xidian University, Xi'an 710071, China.
² School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China.

PMID: 29390666
DOI: 10.1063/1.5019288

Abstract

A virtual reconstruction method of directly capturing phase information between different nominal frequency signals, without frequency transformation, is proposed in this paper, building a virtual standard frequency signal whose frequency equals the measured nominal frequency and then making continuous comparison in the measuring gate which is synchronous with multiple periods between the measured signal and the reference frequency signal. Phase variations of the measured signal in every continuous gate are determined, and continuous phase-measuring is implemented. The experimental result verifies this special method for directly processing the phase difference between different nominal frequency signals and realizes a comparison precision of 10^-17/day in a wide range.