作者：代守强, 陈棣湘, 田武刚, 潘孟春, 任远, 周卫红
作者单位：国防科技大学, 湖南 长沙 410073
关键词：平面电容;热障涂层;复导纳;缺陷检测
摘要：
为有效检测热障涂层的缺陷，研究基于平面电容传感器的缺陷检测系统。该文对用于热障涂层缺陷检测的平面电容传感器的工作原理进行分析，结合热障涂层的结构，利用COMSOL有限元仿真软件对传感器结构进行优化设计，设计微小电容检测电路，并通过复导纳的方法提取检测信息，搭建热障涂层缺陷检测系统，并对系统的性能进行测试。实验测试中对3种不同厚度的氧化铝陶瓷片进行复导纳的检测，通过对检测结果进行数据分析更易区分不同厚度的陶瓷片，即基于平面电容传感器的缺陷检测系统可以有效检测出热障涂层的厚度变化缺陷。
Thermal barrier coatings based on planar capacitive sensor defect detection system
DAI Shouqiang, CHEN Dixiang, TIAN Wugang, PAN Mengchun, REN Yuan, ZHOU Weihong
National University of Defense Technology, Changsha 410073, China
Abstract: In order to more effectively detect thermal barrier coating defects, research on defect detection system based on planar capacitive sensor. The principle of the planar capacitance sensor was analyzed in this paper, the structure of the thermal barrier coating was described and the sensor structure was optimized with COMSOL finite element simulation software. Design tiny capacitance detection circuit, and extract information by detecting the complex admittance method. The defect detection system used for defect detection of thermal barrier coatings was set up and the performance of the system was tested. Experimental tests on three different thicknesses of alumina ceramic pieces were re-admittance testing, through the analysis of test results it can be relatively easy to distinguish the different thickness of the ceramic sheet. The testing results show that the defect detection system which based on flexible planar capacitive sensor can detect the defects in variation in thickness of the thermal barrier coatings effectively.
Keywords: planar capacitive;thermal barrier coatings;complex admittance;detect detection
2017, 43(1): 78-83 收稿日期: 2016-07-13;收到修改稿日期: 2016-08-17
基金项目: 国家自然科学基金（61171134）；高等学校博士学科点专项科研基金（20134307120016）
作者简介: 代守强(1991-),男,湖北襄阳市人,硕士研究生,专业方向为电磁检测及应用。
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