FIELD: measuring equipment.
SUBSTANCE: invention relates to electric radio measurements and can be used in designing digital devices for measuring mean-square values of sinusoidal signals. Method and its versions is determining parameter of sinusoidal voltage by measuring only its instantaneous value selected strictly at certain moment, which depends on analysed voltage frequency and measured parameter. Measuring device includes analogue comparator, analog-to-digital converter, time interval former and averaging unit.
EFFECT: technical result achieved when using present group of inventions is enabling implementation of relatively simple digital devices.
11 cl, 5 dwg
