定量监测裂纹涡流传感器阻抗特性研究  

Research on Trans-impedance Property of Eddy Current Sensor for Quantificationally Monitoring Crack

作　　者：尹志朋 李培源[1] 李全通[1] 刘宇汇 YIN Zhi-peng LI Pei-yuan LI Quan-tong LIU Yu-hui(Aeronautics anti Astronautics Engineering College,Air Force Engineering University,Xi＇an 710038, China 96 Detachments of 94333 Army, Weifang 261000, China)

机构地区：[1]空军工程大学航空航天工程学院 [2]94333部队96分队

出　　处：《仪表技术与传感器》2016年第12期5-8,30,共5页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(51201182);国家重大基础研究计划资助项目(2015CB057400)

摘　　要：为了提高环状涡流柔性传感器的裂纹监测灵敏度,首先分析了提离距离和材料电导率对传感器阻抗的影响,然后搭建实验系统证明了传感器模型的正确性;进而建立了提离距离和材料电导率双参数跨阻抗网格图,并对系统监测2A12-T4铝合金材料的工作频率进行了优化。结果表明:在双参数跨阻抗特性网格图中,网格面积越大,该网格对应参数条件下监测灵敏度越高;相交曲线夹角越接近90°,双参数对系统输出影响的独立性越好。预制裂纹监测试验表明,基于分段监测理念的环状涡流传感器具备识别和定量监测裂纹的能力。In order to increase the crack monitoring sensitivity of the cyclic flexible eddy current sensor, the effects of the lift- off and material conductivity on the sensor＇s trans-impedance were analyzed, and the experimental system was established to prove the correctness of the sensor model.Furthermore,the lift-off and material conductivity double parameters trans-impedance grid pattern was proposed, and the system work frequency of monitoring 2A12-T4 aluminum alloy material＇s crack was optimized.The resuits show that in the double parameters trans-impedance grid pattern, the greater the grid area is, the higher the crack monitoring sensitivity under corresponding parameters condition will be.When the cross curve angle is closer to 90°, the influence of the two parameters on the output signal is more irrelevant.Prefabricated crack monitoring test results prove that the sensor based on the segment-monitoring method has the capability of recognition and qUantificationally monitoring crack propagation.

关 键 词：结构健康监测 涡流传感器 跨阻抗 2A12-T4铝合金 

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]