METHOD OF DETERMINING PHASE DISPLACEMENT ANGLE BETWEEN TWO SIGNALS Russian patent published in 2008 - IPC G01R25/00 

FIELD: physical; measurements.

SUBSTANCE: method involves measuring instant values of two signals, digitising them for the same points in time, storage of each numerical reading as the current and previous, determination of the difference and sum of each pair of the current and previous values, multiplication of the difference and sums, summation of the products, determination of the reactive quasi-power multiplication of the current readings of signals and determination of their active quasi-power . The phase angle displacement φ_a,_b between signals a(t_j) and b(t_j) is determined from the expression: In the initial moment, a reference signal s(t_j) of the type s(t_j)=A_msin(ωt_j) is formed, where A_m is the amplitude of the reference signal, ω is the angular frequency of the reference signal. The phase angle displacements φ_a,s and φ_b,s between the first and reference signals, and the second and reference signals are determined, and the value of the phase angle displacement between signals a(t) and b(t) are determined as the difference of the values φ_a,s and φ_b,s.

EFFECT: simplification increased accuracy of determining phase angle displacement between two sinusoidal and non-sinusoidal signals.

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