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different frequency synchronization Theory and Its frequency measurement Practice Teaching Innovation Based on lissajous figure Method

引用

Journal of Beijing Institute of Technology 2018年第2期27卷 198-205页

作者： Xin Geng Songlin Li Guangming Huang Baoqiang Du Jianhua Chen School of Electronic Information Engineering Zhengzhou University of Light IndustryZhengzhou 450001China Science and Technology on Electronic Information Control Laboratory Chengdu 610036China

According to the requirement of multi-parameter time and frequency measurement without frequency normalization,a different frequency synchronization theory is proposed based on lissajous figure method and the variation lawof lissajous figure which are used in practice teaching of frequency measurement. The theory can achieve high-precision transmission and comparison of time and frequency and precise locking and tracking of phase and frequency,improve the level of scientific research on time and frequency for postgraduate,and promote practice teaching innovation of time frequency measurement for undergraduate. Utilizing the ratio of horizontal and vertical inflection point of the lissajous figure,the nominal frequency of the measured signal is precisely *** frequency deviation between the measured frequency and its nominal frequency can be obtained by combining the turning cycle of the lissajous figure. By observing the phase relationship between the frequency standard signal and the measured signal,the accurate measurement of the frequency is implemented. Experimental results showthat the direct measurement and comparison better than the 10-11 order of magnitude with common frequency source can be finished between any signal *** frequency measurement method based on the theory has the advantage of simple operation,quick measurement speed,small error,lownoise and high measurement precision. It plays an important role in time synchronization,communications,metrology,scientific research,educational technology practice and equipment and other fields.

关键词： lissajous figure different frequency synchronization frequency measurement

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