An Optical Measurement Method for Electrostatic Sensing Based on Fabry-Perot Sensing System

Among the various methods for detecting electrostatic discharge, optical electrostatic sensors have attracted widespread attention due to their numerous advantages, such as high sensitivity and rapid response capabilities. As a type of optical sensor, the performance of fiber-optic F-P electrostatic sensors will be affected the design of the collector. Therefore, a detailed study of the collector design in F-P electrostatic sensors is crucial for enhancing the precision and reliability of electrostatic discharge measurements. In this paper, the sensing capabilities of sensors with equilateral triangular, square, and circular collectors of identical areas under external applied voltage are tested. Simultaneously, models of these three shaped collectors are constructed and subjected to simulation analysis. Experimental results demonstrate that the cavity drive displacement of the sensor with a circular collector exhibits a good linear relationship with the applied voltage. The results also indicate that circular collector, compared to square and equilateral triangular ones, are more suitable for use as sensing modules in sensors. This research provides meaningful insights for the design and optimization of these sensors.