摘要
针对传统电涡流检测方法难以检测碳纤维增强聚合物(Carbon Fiber Reinforced Polymer, CFRP)材料隐藏纤维断裂缺陷问题,设计了一种新型涡流探头。该探头主要由两个水平矩形激励线圈和一个圆形接收线圈组成,差分式激励可预先消除部分噪声,且水平矩形线圈产生的涡流更均匀、在垂直方向上渗透更好,有利于检测层状结构的CFRP材料。通过建立三维有限元模型,分析了CFRP材料不同铺层方向的涡流路径,对比分析了不同探头的灵敏度,计算了纤维断裂位于不同层时探头感应电压变化情况。结果表明,所设计探头能抑制提离效应,对于CFRP材料纤维断裂具有更高的检测灵敏度,且可根据探头感应电压的变化情况判断出纤维断裂方向及位置,相关研究为探头设计和CFRP材料电涡流检测提供了理论依据。
Targeting at the problem that the traditional eddy current testing methods are difficult to detect the hidden fiber fracture defects in carbon fiber reinforced polymer(CFRP)materials,a new eddy current probe is designed.The probe consists of two horizontally placed rectangular driving coils and a circular pickup coil.The differential drive can pre-filter out part of the noise.In addition,the horizontally placed rectangular coil produces a more uniform eddy current with better penetration in the vertical direction,which is more favorable for the detection of CFRP materials with laminated structures.Based on the construction of a three-dimensional finite element model,the changes of eddy current paths in CFRP materials with different layup directions are analyzed,the sensitivity of different probes is compared,and the changes of the induced voltage of the probes are analyzed when the fiber breaks are located in different layers.The results show that the designed probe can effectively suppress the lift off effect,which has higher sensitivity for the detection of fiber fracture in CFRP materials,and the direction and location of fiber fracture can be determined according to the change in induced voltage of the probe.This study provides a theoretical basis for probe design and eddy current detection of CFRP materials.
作者
严昌利
包俊
熊新
YAN Changli;BAO Jun;XIONG Xin(Faculty of Information Engineering and Automation,Kunming University of Science and Technology,Kunming Yunnan 650500,China;Faculty of Civil Aviation and Aeronautics,Kunming University of Science and Technology,Kunming Yunnan 650500,China;Yunnan Key Laboratory of Artificial Intelligence,Kunming University of Science and Technology,Kunming Yunnan 650500,China)
出处
《传感技术学报》
北大核心
2025年第7期1190-1198,共9页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金项目(62203195)
云南省应用基础研究专项青年项目(202201AU070102)。
关键词
涡流检测
涡流探头
有限元仿真
碳纤维复合材料
纤维断裂
eddy current testing
eddy current probe
finite element simulation
carbon fiber reinforced polymer
fiber fracture
