基于平面电容层析成像的复合材料无损检测灵敏度矩阵

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英文篇名：Sensitivity Matrix for Composite Materials Nondestructive Detection Based on Planar ECT 作者：张玉燕 ; 任萍 ; 王震宇 ; 孙东涛 ; 温银堂 英文作者：ZHANG Yuyan;REN Ping;WANG Zhenyu;SUN Dongtao;WEN Yintang;Key Laboratory of Measurement Technology and Instrumentation of Hebei Province,School of Electrical Engineering,Yanshan University; 关键词：平面阵列 ; ECT ; 热防护 ; 无损检测 ; 灵敏度矩阵 英文关键词：planar array;;ECT;;thermal protection;;nondestructive detection;;sensitivity matrix 中文刊名：WSJC 英文刊名：Nondestructive Testing 机构：燕山大学电气工程学院测试计量技术及仪器河北省重点实验室; 出版日期：2018-11-10 出版单位：无损检测 年：2018 期：v.40;No.404 基金：河北省自然科学基金资助项目(E2017203240) 语种：中文; 页：WSJC201811015 页数：5 CN：11 ISSN：31-1335/TG 分类号：51-55

摘要

提出了一种用于热防护材料无损检测的平面阵列电容层析成像(ECT)传感方法,该方法能在有限的接近范围内检测目标对象。研究了一种12电极平面的ECT系统,并利用ANSYS软件建立了仿真模型。在图像重建的过程中,灵敏度矩阵是必不可少的。为了优化灵敏度矩阵,讨论了敏感场介电常数和重建图像切片层的影响。试验结果表明,不同切片层的重建图像差异较大,第二层图像质量最高,而介电常数的变化对检测结果影响不大。
        A promising method of planar array electrical capacitance tomography(ECT)for thermal protection materials nondestructive detection is presented.This method can detect targeted object only from a limited access.In this study,aplanar ECT system with 12 electrodes has been developed for experiment and its simulation model also has been built by using ANSYS.The sensitivity matrix is essential and fundamental in the process of image reconstruction.To optimize the sensitivity matrix,the influences of permittivity of sensitive filed and selection of section for reconstruction image have been discussed.The experimental results show that there exist great differences in reconstruction images for different sections and the image quality of the second layer is the highest,whereas the change of permittivity has little influence on detection results.

引文

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