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Article Navigation> JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY> 2018> 27(2): 198-205
Xin Geng, Songlin Li, Guangming Huang, Baoqiang Du, Jianhua Chen. Different Frequency Synchronization Theory and Its Frequency Measurement Practice Teaching Innovation Based on Lissajous Figure Method[J]. JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2018, 27(2): 198-205. doi: 10.15918/j.jbit1004-0579.201827.0206
Citation: Xin Geng, Songlin Li, Guangming Huang, Baoqiang Du, Jianhua Chen. Different Frequency Synchronization Theory and Its Frequency Measurement Practice Teaching Innovation Based on Lissajous Figure Method[J].JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2018, 27(2): 198-205.doi:10.15918/j.jbit1004-0579.201827.0206
shu

Different Frequency Synchronization Theory and Its Frequency Measurement Practice Teaching Innovation Based on Lissajous Figure Method

doi:10.15918/j.jbit1004-0579.201827.0206
  • 1.

    School of Electronic Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China;Science and Technology on Electronic Information Control Laboratory, Chengdu 610036, China

  • 2.

    School of Electronic Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China

  • 3.

    Science and Technology on Electronic Information Control Laboratory, Chengdu 610036, China

  • Received Date:2017-12-10
    Abstract
  • 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 law of 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 calculated. The 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 show that the direct measurement and comparison better than the 10 -11order of magnitude with common frequency source can be finished between any signal frequencies. The frequency measurement method based on the theory has the advantage of simple operation, quick measurement speed, small error, low noise and high measurement precision. It plays an important role in time synchronization, communications, metrology, scientific research, educational technology practice and equipment and other fields.
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    • References (18)
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