Open AccessDesign and Analysis of Power Frequency Electric Field Sensing Unit with Reduce Edge Effect
Author(s) -
Liangjin Fan,
Wenbin Zhang
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1213/4/042066
Subject(s) - electric field , capacitive sensing , sensitivity (control systems) , capacitance , equipotential , linearity , electrical engineering , field (mathematics) , electronic engineering , materials science , engineering , physics , mathematics , electrode , quantum mechanics , pure mathematics
The performance of the electric field sensing unit determines the sensitivity, linearity and range of the electric field sensor. In this paper, a kind of alternating electric field sensing unit based on parallel capacitance was been introduced. And it analyzed the measurement principle of the parallel capacitive sensing unit. The structure parameters of the electric field sensing unit with equipotential ring were been designed by simulation, which reduced the influence of edge effect on the performance of the sensing unit. According to the measurement standard of power frequency electric field, the designed sensing units were tested under uniform electric field. And the influence of the sampling capacitances on the static characteristics of the sensing unit was been analyzed. The sensing unit with the best performance had a linearity of 1.6025% and a sensitivity of 248 mV/(kV/m). Its sensing unit had the characteristics of small volume, low production cost and it was easy to integrate and have mass production.