模糊区特性下高精度频率测量技术

doi:10.3969/j.issn.1001-2400.2017.04.014

Abstract

Abstract:

The phase difference change is random in the discrete fuzzy area by considering the limit of device resolution, which the device can not stably capture, and the precision of the measured value only reaches the level of ns, but the phase difference change in the concentrated fuzzy area is step by step, and the device can stably capture the change of ps. By using the fuzzy area conversion technology, a high precision frequency measurement is designed. Through computer control and frequency synthesis,the discrete fuzzy area is converted to the concentrated fuzzy area, the ps stability properties of phase difference change on the border of the concentrated fuzzy area is used, the precision can be improved two or three orders of magnitude, and the high precision measurement in a wide range is achieved.

Key words: frequency measurement, phase difference change, measurement resolution, fuzzy area

JIA Zhaomin;LI Zhiqi;ZHOU Wei;YANG Xuhai;SUN Baoqi;MIAO Miao;DONG Shaofeng. High precision frequency measurement based on the characteristic of the fuzzy area[J].Journal of Xidian University, 2017, 44(4): 75-79.

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High precision frequency measurement based on the characteristic of the fuzzy area

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