BRIDGE METER FOR MEASURING PARAMETERS OF TWO-TERMINAL NETWORKS Russian patent published in 2006 - IPC G01R17/10 

FIELD: electric engineering; measurement technology.

SUBSTANCE: bridge meter can be used for measurement of active resistances as well as resistances of physical values resistive parametric detectors introduced into electric bridge. Bridge meter for measuring parameters of two-terminal networks has feed pulse (rectangular, changing linearly or according to square law) oscillator 1, four-arm bridge circuit and zero-indicator 21. Single resistors 8, 19 and 20 are connected with three arms of bridge circuit. The fourth arm of bridge circuit is connected with frequency-independent two-terminal network formed by two parallel branches. First branch consists of single resistors 9 and 10, capacitor 12 and resistive detectors 11, 13 and 14. Second branch has resistors 15 and 16, connected in series, and inductance coil 17 that is connected parallel with resistor 18. Resistive detectors 11, 13 and 14 are earthed. Error in measurement is reduced due to elimination of component of error caused by parasitic capacitance of three resistive detectors relatively earth. Dependent separate balancing of bridge circuit is used in the invention.

EFFECT: reduced error of measurement.

1 dwg