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A Super High Resolution Distance Measurement Method Based on Phase Comparison 被引量:7

A Super High Resolution Distance Measurement Method Based on Phase Comparison
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摘要 Phase comparison method can enhance the measurement resolution to 10^-13/T 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. Phase comparison method can enhance the measurement resolution to 10^-13/T 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.
出处 《Chinese Physics Letters》 SCIE CAS CSCD 2008年第8期2820-2822,共3页 中国物理快报(英文版)
基金 Supported by the National Natural Science Foundation of China under Grant, Nos 60571060 and 10703004.
关键词 the power-law exponents PRECIPITATION durative abrupt precipitation change the power-law exponents, precipitation, durative, abrupt precipitation change
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  • 2Zhou W, Yu J G, Li J, Xuan Z Q and Zhou H 2000 IEEE 54th Annual Frequency Control Symposium (Kansas MO 7-9 June 2000) p 557.
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