Feasibility study on crack monitoring scheme of metal structure based on eddy current array sensor

JIAO Sheng-bo; DING Hua; HE Yu-ting; HOU Bo

doi:10.13873/j.1000-97872013.08.037

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Feasibility study on crack monitoring scheme of metal structure based on eddy current array sensor

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- Feasibility study on crack monitoring scheme of metal structure based on eddy current array sensor
- Vol. 32, Issue 8, Pages: 43-46+49(2013)
- 作者机构：
  
  空军工程大学航空航天工程学院
- 作者简介：
- 基金信息：
- DOI：10.13873/j.1000-97872013.08.037
  CLC： TP212.1
- Published：2013
- 稿件说明：
移动端阅览
[1]焦胜博,丁华,何宇廷,侯波.基于涡流阵列传感器的金属结构裂纹监测方案可行性研究[J].传感器与微系统,2013,32(08):43-46+49.

JIAO Sheng-bo, DING Hua, HE Yu-ting, et al. Feasibility study on crack monitoring scheme of metal structure based on eddy current array sensor[J]. 2013, 32(8): 43-46+49.
[1]焦胜博,丁华,何宇廷,侯波.基于涡流阵列传感器的金属结构裂纹监测方案可行性研究[J].传感器与微系统,2013,32(08):43-46+49. DOI： 10.13873/j.1000-97872013.08.037.

JIAO Sheng-bo, DING Hua, HE Yu-ting, et al. Feasibility study on crack monitoring scheme of metal structure based on eddy current array sensor[J]. 2013, 32(8): 43-46+49. DOI： 10.13873/j.1000-97872013.08.037.

摘要

针对飞机金属螺栓孔连接结构疲劳裂纹的特点和实时监测的需求

提出了一种基于柔性平面的涡流阵列传感器

设计了疲劳裂纹扩展实时监测方案

搭建了疲劳裂纹监测实验系统。通过建立监测系统的三维有限元仿真模型

得到传感器工作时感应磁场和磁位矢量的分布规律

验证了监测方案的可行性。通过设计疲劳裂纹扩展试验

确定了涡流阵列传感器定量监测能力。等幅程序载荷谱作用下2A12—T4铝合金试件疲劳裂纹监测试验结果表明:提出的涡流阵列传感器能够有效定量监测裂纹的扩展

裂纹监测方案是可行的

监测精度达到1 mm。仿真结果表明:传感器在工作时磁矢量位的分布关于激励线圈导线中心对称

在激励线圈导线中间达到最大值

同时裂纹存在时感应通道归一化跨阻抗幅值比增大10%。

Abstract

To monitor fatigue crack of aircraft metallic structure in real-time

a kind of eddy current array sensor based on flexible planar is proposed and a scheme for fatigue expansion crack monitoring is designed of aircraft metallic structure based on eddy current array sensor is put forward.The distribution rule of induced magnetic field and magnetic potential vector are obtained through establishing three dimensional finite element（FE） simulation model and the feasibility of the monitoring scheme is verified.By designing fatigue crack propagation experiment

quantitative capability of the sensor on monitoring is verified.The result of fatigue crack monitoring experiment of 2A12—T4 aluminum alloy under constant load indicates that the sensor can monitor the fatigue crack propagation efficiently with the precision of 1mm.The simulation result shows that the distribution of magnetic vector potential is symmetrical about the center of the exciting coil wire and the magnetic vector potential reaches maximum at the center of the exciting coil wire

and the normalized trans-impedance amplitude increases 10 % under the condition of fatigue crack.

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references

老龄飞机金属结构腐蚀检测中的平面涡流阵列传感器仿真研究 [J]. 丁华,杜金强,何宇廷,伍黎明,张海威. 全面腐蚀控制 . 2011(06)

基于电位法原理的金属结构裂纹监测传感器研究 [J]. 杜金强,何宇廷,崔荣洪,舒文军,常飞. 南京航空航天大学学报 . 2010(03)

螺栓孔裂纹的漏磁检测 [J]. 刘美全,徐章遂,米东. 计算机测量与控制 . 2006(10)

用于结构健康监测的实时DSP数据采集及小波分析模块 [J]. 赵霞,袁慎芳,王帮峰. 测控技术 . 2003(04)

结构健康监控[M]. 国防工业出版社 , 袁慎芳, 2007

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