Direct Observation of Electric Field in Solid Dielectrics Using SEA Method With Piezoelectric Sensor Thicker Than Test Specimen

IF 3.1 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-07-15 DOI:10.1109/TDEI.2025.3589336

Kazunori Kadowaki;Shinji Yudate;Ryotaro Ozaki;Masumi Fukuma

引用次数: 0

Abstract

This article presents a novel method for the direct observation of electric field profiles in solid dielectrics based on the step electroacoustic method. In the proposed approach, long pressure waves generated by a step voltage excitation are detected using a piezoelectric sensor that is significantly thicker than the test specimen. The transducer acts as a high-pass filter, allowing a step-function-like pressure signal to be observed for each space charge. As a result, the oscillogram directly shows the electric field profile in the specimen. Using an 80-

$\mu $

m-thick PVDF sensor and a 50-

$\mu $

m-thick PET film as the test specimen, we experimentally demonstrate that the spatial resolution of the profile after deconvolution can be less than

$10~\mu $

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厚于试样的压电传感器在固体介质中电场的直接观测

本文提出了一种基于阶跃电声法直接观测固体介质中电场分布的新方法。在提出的方法中，使用比试样厚得多的压电传感器检测由阶跃电压激励产生的长压力波。换能器作为高通滤波器，允许观察到每个空间电荷的阶跃函数式压力信号。因此，示波图直接显示了试样中的电场分布。采用80 ~ $\mu $ m厚的PVDF传感器和50 ~ $\mu $ m厚的PET薄膜作为试样，实验证明反卷积后的剖面空间分辨率可以小于$10~ $\mu $ m。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Dielectrics and Electrical Insulation 工程技术-工程：电子与电气

CiteScore

6.00

自引率

22.60%

发文量

309

审稿时长

5.2 months

期刊介绍： Topics that are concerned with dielectric phenomena and measurements, with development and characterization of gaseous, vacuum, liquid and solid electrical insulating materials and systems; and with utilization of these materials in circuits and systems under condition of use.