互扰对涡流阵列传感器裂纹检测性能影响  

Influence of interference on crack inspection ability of flexible eddy current sensor array

作　　者：杜金强[1] 何宇廷[1] 李培源[1] 武卫[1] 

机构地区：[1]空军工程大学航空航天工程学院,陕西西安710038

出　　处：《华中科技大学学报（自然科学版）》2015年第11期22-26,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51201182)

摘　　要：针对柔性涡流阵列传感器阵列单元之间的互扰问题,分别建立了涡流阵列单元和涡流阵列传感器的有限元模型,分析了互扰对涡流阵列传感器输出的影响以及互扰的来源,研究了互扰对涡流阵列传感器裂纹检测能力的影响.研究结果表明:互扰会导致阵列传感器输出信号幅值显著减小、相位出现偏移;涡流阵列传感器的互扰来源于阵列单元附近的激励线圈;互扰会对涡流阵列传感器的裂纹检测灵敏度产生一定影响,但若以跨阻抗幅值作为传感器的特征量,互扰对裂纹检测灵敏度的影响可以忽略,因此可以用阵列单元的分析结果来指导涡流阵列传感器的设计.Considering the interference between array units of an flexible eddy current sensor array , the finite element models of the array unit and the sensor array were built up ,and the influence of in‐terference on output and crack inspection ability of the sensor array were studied .Besides ,the root which led to the interference was also researched .The results show that the interference comes from electromagnetic field excited by exciting coil of neighboring array unit .Due to the interference ,the amplitude of sensor array′s output will decrease sharply and the phase of sensor array′s output will offset ,and also there is some influence on crack inspection ability of the sensor array .If the transim‐pedance′s amplitude of the sensor is treated as characteristic quantity ,the influence on crack inspec‐tion ability could be ignored ,and therefore the research on sensor array can be carried out by studying on array unit .

关 键 词：涡流阵列传感器 裂纹检测 互扰 有限元模型 柔性 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置] V215.6[自动化与计算机技术—控制科学与工程]