传感技术学报2013，Vol.26Issue(2)：205-210,6.DOI:10.3969/j.issn.1004-1699.2013.02.013
基于半解析模型的花萼状涡流传感器损伤监测灵敏度分析
Crack Monitoring Sensitivity Analysis of Rosette Eddy Current Sensor Based on Semi-Analytical Model
摘要
Abstract
To monitor the crack damage located at bolt hole of metallic bolted-joint structure, a kind of rosette eddy current sensor with flexible and planar features was introduced, and the effects of driving frequency and sensor geometric parameters on crack monitoring sensitivity of sensor were analyzed based on constructed damage monitoring semi-analytical model. Four-channel rosette eddy current sensor was prepared with flexible printed circuit board technology, and fatigue crack monitoring experiment of 2A12 aluminum alloy specimen with center hole was carried out to verify the fatigue crack monitoring capability of sensor. Analysis results show that optimized driving frequency exists under difference liftoffs and the optimized damage monitoring sensitivity decreases with the increasing of liftoff. Damage monitoring sensitivity increases with decreasing of winding thickness and increasing of distance between driving and sensing winding, while the ratio between driving and sensing winding width has a small effect on the monitoring sensitivity of the sensor damage. Monitoring experiment result indicates that monitoring curve changing-point of sensing channels could be served as the indication of crack position except channel 1, and monitoring curve changing-point of channel 1 is initiation point of accumulated fatigue damage.关键词
结构健康监测/基于状态的维修/花萼状涡流传感器/监测灵敏度/半解析模型Key words
condition-based maintenance/ structure health monitoring/ rosette eddy current sensor/ monitoring sensitivity/ semi-analytical model分类
信息技术与安全科学引用本文复制引用
焦胜博,丁华,何宇廷,侯波..基于半解析模型的花萼状涡流传感器损伤监测灵敏度分析[J].传感技术学报,2013,26(2):205-210,6.基金项目
国家高技术研究发展计划项目(2009AA04Z406) （2009AA04Z406）
十二五预研飞机结构裂纹检测微米传感器研究项目(51327030204) （51327030204）
