INCREASE OF STRAIN GAGE OUTPUT VOLTAGE SIGNALS ACCURACY USING VIRTUAL INSTRUMENT WITH HARMONIC EXCITATION

Dalibor Kuhinek, Igor Zoric, Josip Butorac

Abstract

This paper describes the principle of harmonic excitation of strain gages in bridge configuration. This system's properties are mathematically determined and measurements are conducted with commutated excitation, AC and harmonic excitation - with and without filtering. The possibility of increasing the accuracy of output bridge voltage measurement by using harmonic excitation is shown.

Keywords

harmonic excitation, resistive bridge, virtual instrument

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IMEKO-WC-2009-TC4-290.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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