电容式电子测压器的边缘效应分析

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英文篇名：Edge effect analysis of capacitive electronic pressure measuring device 作者：吴哲琼 ; 范锦彪 ; 王雪姣 英文作者：WU Zheqiong;FAN Jinbiao;WANG Xuejiao;National Key Laboratory for Electronic Measurement Technology,North University of China;Key Laboratory of Instrumentation Science and Dynamic Measurement,Ministry of Education,North University of China; 关键词：电容传感器 ; 边缘效应 ; 同轴柱状 ; Maxwell 英文关键词：capacitance sensor;;edge effect;;coaxial columnar;;Maxwell 中文刊名：SYCS 英文刊名：China Measurement & Test 机构：中北大学电子测试技术国家重点实验室;中北大学仪器科学与动态测试教育部重点实验室; 出版日期：2018-05-31 出版单位：中国测试 年：2018 期：v.44;No.238 基金：国防科技重点实验室基金项目(04011007) 语种：中文; 页：SYCS201805027 页数：5 CN：05 ISSN：51-1714/TB 分类号：150-154

摘要

为克服电容式传感器的边缘效应问题,提高电容式电子测压器的测量精度,将测压器简化成同轴柱状电容,利用Ansoft Maxwell软件对同轴柱状电容的结构参数进行仿真,主要包括内外筒的轴向长度、外筒厚度、内筒厚度、内外筒间距4个参数,通过Matlab进行数据处理,分析在不同参数下电容传感器电容的变化情况,为后续对电容式电子测压器的结构参数优化提供依据。仿真结果表明:对传感器测试性能影响较大的是内外筒的轴向长度和内外筒的间距,内外筒轴向长度越长、筒间距越小边缘效应越小;内、外筒的厚度对测量精度也有一定影响,厚度越大边缘效应影响越大。
        In order to overcome the edge effect of capacitance-type senser, improve the measuring accuracy of electronic capacitive pressure measuring device, the pressure measuring devicewas simplified into a coaxial columnar capacitor, and the structural parameters of the coaxial columnar capacitor were simulated with the Ansoft Maxwell software. The parameters mainly include the axial length of the inner and outer cylinders, the thickness of the outer and inner cylinders, and the distance between the inner and outer cylinders. The data were processed via Matlab to analyze the capacitance changing situation of capacitive sensor under different parameters, providing a basis for further optimization of the structural parameters of the electronic capacitive pressure measuring device. The simulation results showthat the axial length of the inner and outer cylinders, the distance between the inner and outer cylinders have greater impact on sensor test performance. The edge effect will be smaller with the longer axial length of the inner and outer cylinders and the smaller cylinder distance. The thickness of the inner and outer cylinders also has a certain influence on the measuring accuracy, and the edge effect will be greater when the thickness is greater.

引文

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