METHOD FOR MEASURING BRIDGE SIGNAL PROCESSING AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2010 - IPC G01R17/10 

FIELD: measurement technique.

SUBSTANCE: invention refers to measurement technique and can be used in technical objects remote control and diagnostics systems, in measuring complexes when processing equipment condition monitoring is performed. When signal entering from measuring bridge over two-wire communication line is processed the operation of signal filtering by active low-pass filter is combined with operation of signal symmetrisation and both operations are performed directly at input of processing device. Active low-pass filter is connected to communication line output, to each of its wires relative to ground. Relative to each other, active low-pass filters are connected so that they create input cascades of instrument amplifier with common resistor for gain coefficient adjustment. Active low-pass filters are made identical to each other by parametres of active and passive elements used in them, thus ensuring high degree of symmetrisation of processing device input circuits.

EFFECT: improvement of symmetrisation of signal processing device input circuits, lowering level of capacitive and inductive components of noise, lowering requirements to frequency properties of operational amplifiers used in the device.

2 cl, 2 dwg