FIELD: electricity.
SUBSTANCE: invention is related to electric measurement equipment and is intended for measurement of amplitude, difference of phases and frequency of harmonic signals in different systems, where high efficiency is required, for instance in systems of automatic control. Device consists of squaring circuit, three units of sliding averaging, two linear converters, circuits of square-rooting, clock oscillator, counter of binary pulses, comparator, two multipliers, divider, circuit of nonlinear limitation, trigonometric unit and channel of current amplitude measurement.
EFFECT: reduced time delay from the moment of pickup of discrete counts of inlet signals till production of result (1/4 period), higher accuracy of measurement of difference of phases between current and voltage and possibility to perform assessment of AC parametres with presence of phase and amplitude noise and high order harmonics.
2 dwg
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