Design of optical voltage sensor based on electric field regulation and rotating isomerism electrode

TL;DR

This paper presents a novel optical voltage sensor design that employs electric field regulation and rotating electrodes, utilizing lock-in amplification to improve stability and reduce interference from environmental factors.

Contribution

It introduces a new sensor architecture combining electric field modulation with rotating electrodes and lock-in technology for enhanced measurement accuracy.

Findings

Effective suppression of low-frequency interference.

Successful signal restoration with reduced sample rate.

Enhanced stability and reliability of voltage measurement.

Abstract

Temperature drift, stress birefringence and low frequency vibration lead to the randomness and fluctuation of the output of optical voltage sensor(OVS). In order to solve the problem, this study adopts the lock-in amplifier technology with the aid of a high-speed rotating electrode to realize electric field modulation. This technology could shift the measured signal frequency band from near 50 Hz moved to several kilometer Hz, so as to make the output signal avoid the interference from low-frequency temperature drift, stress birefringence and vibration, leading to higher stability and reliability. The electro-optic coupling wave theory and static electric field finite element method are utilized to investigate the shape of modulation wave. The simulation results proves that lock-in technology is able to prevent the measured voltage signal from the large step signal interference and restore the perfect original signal. While the sample rate is decreased to the value of the modulation frequency.