METHOD OF CORRECTION OF SYSTEMATIC ERROR OF MEASUREMENT CONVERTER WITH PARAMETRIC PICKUP Russian patent published in 1999 - IPC

FIELD: measurement of electric and nonelectric values by means of parametric pickups. SUBSTANCE: method of correction of systematic error of measurement converter consists in formation of auxiliary signal proportional to supply voltage of pickup or current consumed by it. First value of output signal of measurement converter is ratio of auxiliary signal to first value of output signal of pickup. Supply voltage of pickup is measured additionally after formation of first value f₁ of output signal of measurement converter, mentioned auxiliary signal is formed again and second value f₂ of output signal of pickup and repeatedly formed auxiliary signal are formed anew. Value Y(X) of measurement result is found by formula , where α is coefficient equal to ratio of supply voltage during determination of first value f₁ of output signal to supply voltage during determination of second value f₂ of output signal. EFFECT: reduced constant systematic additive errors and sensitivity threshold of measurement converters with parametric pickups. 1 dwg