基于平面电容层析成像的复合材料无损检测灵敏度矩阵
Sensitivity Matrix for Composite Materials Nondestructive Detection Based on Planar ECT
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。
ECT
热防护
无损检测
灵敏度矩阵
planar array
ECT
thermal protection
nondestructive detection
sensitivity matrix
Abstract
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, a planar 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.
中图分类号 TG115.28 DOI 10.11973/wsjc201811012
所属栏目 复合材料无损检测技术新进展专题
基金项目 河北省自然科学基金资助项目（E2017203240）
收稿日期 2018/7/5
修改稿日期
网络出版日期
作者单位点击查看
备注张玉燕(1976-),女,博士,教授,主要研究方向为电容成像传感技术与结构健康监测
引用该论文: ZHANG Yuyan,REN Ping,WANG Zhenyu,SUN Dongtao,WEN Yintang. Sensitivity Matrix for Composite Materials Nondestructive Detection Based on Planar ECT[J]. Nondestructive Testing, 2018, 40(11): 45～49
张玉燕,任萍,王震宇,孙东涛,温银堂. 基于平面电容层析成像的复合材料无损检测灵敏度矩阵[J]. 无损检测, 2018, 40(11): 45～49
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参考文献
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【2】DU S Y. Advanced composite materials and aerospace engineering[J].Acta Materiae Compositae Sinica, 2007,24(1):1-12.
【3】YOSHIDA K, MORIGAMI H. Thermal properties of diamond/copper composite material[J]. Microelectronics Reliability, 2004, 44(2):303-308.
【4】IGREJA R, DIAS C J. Analytical evaluation of the interdigital electrodes capacitance for a multi-layered structure[J].Sensors and Actuators A:Physical,2004,112(2):291-301.
【5】HU X, YANH W.Planar capacitive sensors-designs and applications[J].Sensor Review,2010,30(1):24-39.
【6】YIN X, HUTCHINS D A. Non-destructive evaluation of composite materials using a capacitive imaging technique[J]. Composites Part B:Engineering, 2012, 43(3):1282-1292.
【7】YE Z, BANASIAK R, SOLEIMANI M. Planar array 3D electrical capacitance tomography[J]. Insight-Non-Destructive Testing and Condition Monitoring, 2013, 55(12):675-680.
【8】THOLIN-CHITTENDEN C, SOLIEMANI M. Planar array ECT sensor design optimisation[C]//World Congress on Industrial Process Tomography.[S.l.]:[s.n.], 2016.
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