Voltage measurement method using an optical fiber interferometer that can improve the measurement resolution of the voltage under test and extend the voltage range

摘要

The present invention relates to a voltage measuring method using an optical fiber interferometer, and in particular, as an optical fiber interferometer, a PZT (piezoelectro transducer) tube is connected in parallel or in series with a reference unit and a sensing unit, respectively, and a voltage to be measured is applied to the PZT ?? The present invention relates to a voltage measuring method which can improve the measurement resolution of the signal or extend the measurement range of the measured voltage.;In the voltage measuring method using the optical fiber interference coherence of the present invention, the light generated from the light source is equally distributed through the first optical coupler using the optical fiber as a medium, and the voltage to be measured is externally polarized to the first and second PZT tubes. Mixing the two optical signals having a phase difference with each other via the first and second PZT tubes while being applied in parallel to each other and being connected in parallel to each other and in parallel with each other; And converting the mixed optical signal having the phase difference into an electrical signal to determine the magnitude of the voltage to be measured according to the interference fringe of the output signal, thereby improving the measurement resolution of the voltage under measurement.