INCREASE OF STRAIN GAGE OUTPUT VOLTAGE SIGNALS ACCURACY USING VIRTUAL INSTRUMENT WITH HARMONIC EXCITATION
Dalibor Kuhinek, Igor Zorić, Josip Butorac · 2009
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.