METHOD OF MEASUREMENT OF PHASE SHIFTS BETWEEN TWO HARMONIC SIGNALS OF SIMILAR FREQUENCY Russian patent published in 2018 - IPC G01R25/00 

FIELD: measuring equipment.

SUBSTANCE: method for measuring phase shifts between two harmonic signals of the same frequency, providing high accuracy of measurement by using the harmonic voltage symmetry property. It can be used in the development of phase shift meters of various devices of high-frequency and ultra-high-frequency ranges. The essence of the method consists in the fact that the team channel sets the fetch time immediately before going through the voltage zero measured and memorized the voltage corresponding to the sample. Next is determined by the time the second sample, following immediately after transition through zero voltage the voltage equal to the opposite sign to the voltage of the first sample. The time of transition of the voltage of the reference channel through zero is defined as the arithmetic average of the time of appearance of the first and second samples. Similarly, in the measuring channel is set to the first sample immediately before going through the voltage zero measured and memorized the voltage corresponding to the sample. Next is determined by the time the second sample, following immediately after transition through zero voltage the voltage equal to the opposite sign to the voltage of the first sample. The time of transition of the voltage of the measuring channel through zero is defined as the arithmetic average of the time of appearance of the first and second samples. The sought phase shift between two harmonic signals of the same frequency is defined as the difference between the time of zero crossing of the voltage of the measuring and reference channels multiplied by the circular frequency of the signals under study.

EFFECT: increase the accuracy of determining phase shifts between two harmonic signals of the same frequency.

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