BRIDGE MEASURING DEVICE FOR MEASURING PARAMETERS OF TWO-TERMINAL CIRCUITS Russian patent published in 2016 - IPC G01R17/10 

FIELD: measuring equipment.

SUBSTANCE: proposed bridge meter of bipoles parameters contains generator of feeding pulses, consisting of generators of pulses with variation of voltage during their duration as per law K₀t⁰, K₁t¹, K₂t², K₃t³, K₄t⁴, where K₀, K₁, K₂, K₃, K₄ - constants and t is current time, of switch from the power amplifier and synchronisation cascade, the first feed pulses generator output is connected to the input of the four-arm bridge circuit (bridge), which forms a common output of two parallel branches of four-arm bridge circuit, the first of these two branches consists of two series-connected resistors, free terminal of one of them is connected to the first output of the generator of feeding pulses, free terminal of the other is grounded, the common output of these two resistors forms the first output lead of the four-arm bridge circuit the second bridge branch includes the first resistor, the first output of which is connected to the common terminal of the first output of generator of feed pulses and resistor of the first branch of the four-arm bridge circuit second branch also includes series-connected second resistor and inductance coil in parallel to the last third resistor is connected, as well as chain of in-series connected capacitors and the fourth resistor, common output of inductance coil, third and fourth resistors is grounded also in bridge circuit includes two terminals for connection of two-terminal of the measuring object, wherein in bridge measuring device there are three extra resistors and varied connection of two terminals for connection of bipoles of measurement objects together with the terminal device of the measuring object transferred from the first branch of the four-arm bridge circuit in its second branch, the second terminal is earthed, the first additional resistor is connected between free leads of the first and second resistors the second additional resistor is connected between the common output of the first and the first additional resistors and first terminal for connection of bipoles of measurement objects, the third additional resistor is connected between the common terminal of the first additional and second resistors and common output of the second additional resistor and the first terminal for connection of bipoles of measurement objects, the common output of the first, the first additional and the second additional resistors forms the second output lead of the four-arm bridge circuit the second output is connected to the second output of the first (differential) input zero-indicator.

EFFECT: reduced measurement error.

1 cl, 1 dwg