RESISTANCE INCREMENTAL CONVERTER (VERSIONS) Russian patent published in 2009 - IPC G01R17/00 

FIELD: physics, measurement.

SUBSTANCE: invention relates to electrotensometry, and can be used for signal transformation of distant four-way single resistance strain gage multi-point measuring systems. According to the invention, the signal transformer of single resistance strain gage contains the basic resistor, reference-voltage source and the first operating amplifier with an isolated power source, whose general output and non-inverse input are connected with one output basic resistor, the inverse input is under zero potential, and output - with the first current terminal of the transformer. Special feature of the invention lies in the fact that, in the transformer there is a second operating amplifier, connected with the common bus, whose output is connected with the second current terminal of the transformer, the inverse input - with the first potential terminal of the transformer, the non-inverse input and the reference-voltage source - with another output of the basic resistor, and the output is the second potential terminal, connected to the corresponding output of the single resistance strain gage. This makes it possible to eliminate the error, due to the in-phase component in the useful signal, and also the circuit resistance when working with remote resistance strain gage in multi-point measuring systems.

EFFECT: removal of errors, due to the in-phase component in the useful signal, and also the circuit resistance when working with remote resistance strain gage in multi-point measuring systems.

2 cl, 2 dwg