BIPOLE PARAMETERS METER Russian patent published in 2019 - IPC G01R27/02 

FIELD: physics.

SUBSTANCE: invention relates to control and measurement equipment and can be used for monitoring and determining parameters of two-terminal networks. Summary: bridge meter has series-connected pulse generator with voltage variation according to the law of step functions, measuring circuit, analogue adder, zero-indicator, first communication line for informative signal, second communication line for supply signal, operational amplifier, additional resistor. First output of the signal wire of the first communication line is connected to the common output of the first and second resistors of the first two-terminal device, the second output of this signal wire is connected to the common output of the third resistor and the second capacitor of the second two-terminal device. Common output of the first resistor and the first capacitor of the first two-terminal device is connected to the first output of the signal wire of the second communication line, the second output of this signal wire is connected to the first (signal) output of the pulse generator. Non-magnet conductors of the first and second communication lines are earthed. Common output of the second output of the signal wire of the first communication line and the common output of the third resistor and the second capacitor of the second two-terminal device is connected to the inverting input of the operational amplifier. Common output of the third and the fourth resistors of the second two-terminal device is connected to the output of the operational amplifier. Additional resistor is connected between non-inverting input of operational amplifier and "ground". First input of the analogue adder is connected to the common output of the second output of the signal wire of the second communication line and the first (signal) output of the pulse generator. Second input of the adder is connected to the common output of the third and fourth resistors and the output of the operational amplifier. Common bus of the analogue adder is grounded, the output of the adder is connected to the input of the null indicator.

EFFECT: technical result: higher accuracy in remote measurements due to reduced error component of error value of capacitance of connecting line and instability of this capacitance.

1 cl, 1 dwg