A Super High Resolution Distance Measurement Method Based on Phase Comparison

Autor:	Miao Miao, Zhou Wei, Zhou Hui, LI Zhi-Qi, Zheng Sheng-Feng
Rok vydání:	2008
Předmět:	Physics Optics business.industry Voltmeter Phase noise Resolution (electron density) Phase (waves) Measure (physics) General Physics and Astronomy Time domain business Linear phase Voltage
Zdroj:	Chinese Physics Letters. 25:2820-2822
ISSN:	1741-3540 0256-307X
Popis:	Phase comparison method can enhance the measurement resolution to 10-13/τ in time domain. This method can also be used in distance measurement in the navigation and positioning. We propose a super high-resolution distance measurement based on linear phase comparison method. A high resolution scheme is put forward on the basis of the research of major factors concerning the phase comparison in the distance measurement. Conversion of a high-linearity phase difference to voltage and high-resolution voltage meter make it possible to obtain a very high phase measurement resolution. When the purpose is to measure distance, the phase noise of frequency source used in the measurement can be reduced partly. Thus this method is favourable for high resolution distance measurement. The precision of the distance measurement can reach 0.1c ps with c being the velocity of light in vacuum.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::552e24a748395736eba867e10ff6355c https://doi.org/10.1088/0256-307x/25/8/024 Zobrazit plný text záznamu