摘要
由于非金属复合材料及其内部不同损伤具有不同介电特性,采用平面式电容传感器阵列可实现无损可视化检测。针对平面式阵列电极结构,研究不同激励模式对复合材料内部缺陷检测效果影响。提出单激励、双激励和奇偶激励3种激励模式,对比分析各种激励模式下传感器信号强度、探测深度等性能差异。结果表明:奇偶激励模式在信号测量和成像质量方面都优于前2种模式。同时也验证了基于电容敏感机理的平面电容传感器阵列对复合材料内部缺陷检测的可行性和有效性。
Because of the different dielectric properties of the nonmetal composite material and its internal damages, a planar capacitive sensor array can be used to achieve visual non-destructive testing. The influence of different excitation modes on testing effect of the internal defects of the composite, aiming at the planar array electrode structure is studied. Three kinds of excitation mode, single, dual and parity excitation are proposed. And their performance differences such as signal strength and detecting depth are analyzed. Compared with single and dual excitation, the results show that signal measurement and imaging quality c/f the parity excitation are better than the others. The feasibility and effectiveness of planar capacitive sensor array based on capacitance sensitive principle for internal defect detection of composite material are also verified.
出处
《传感器与微系统》
CSCD
北大核心
2012年第9期71-74,共4页
Transducer and Microsystem Technologies
基金
中国民航大学中央高校基金资助项目(ZXH2011C003)
中国民航大学教师科研启动基金资助项目(2011QD03S)
中国民航大学科研计划资助项目(2010KYE02)
国家自然科学基金青年基金资助项目(61102096)
关键词
电容层析成像
平面式电容传感器阵列
激励测量模式
无损检测
边缘效应
electrical capacitance tomography
planar capacitive sensor array
excitation-measurement modes
non-destructive testing
edge effect
