An apparatus for calculating a passive element value by a current vector

摘要

The present invention relates to an apparatus for calculating a passive element value by means of a current vector which calculates the values of R, L and C of resistance, coil and capacitor elements as passive elements by measuring a current vector, (A) from the non-inverting terminal (+) and measuring the sinusoidal signal (A) at the same time as receiving the sinusoidal signal (A) output from the sinusoidal oscillator A voltage sensing unit for applying a voltage to the small intestine to amplify the difference between these signals by sensing the output voltage thereof; and a phase shifter for receiving the sinusoidal signal B amplified by the voltage sensing unit and shifting the phase of the sinusoidal signal B A first average output section receiving a sinusoidal signal (D) phase-shifted by 90 in phase and outputting an average value of the signal (D); and a second average output section (A) to an element to be measured and detects and amplifies the output current thereof; and a second average value calculator (12) which receives the current signal (C) output from the current detector and outputs an average value of the current signal A multiplier circuit for multiplying the output signal of the multiplier circuit by a sinusoidal signal (D) whose phase is 90 out of phase with the current signal (C) output from the current sensing unit; G) and extracts only the DC component. An A / D converter for receiving an average signal (E, F) output from the first and second average output units and a signal (H) of a DC component output from the low pass filter unit and converting the received signal to a digital signal; L and C of the measurement element to be measured by receiving a digital signal output from the D / A converter, and a display unit for displaying the values of R, L and C of the measurement element calculated by the microcomputer .