Construction of Crack Perturbation Model and Forward Semi-analytical Model of Attached Eddy Current Sensor

作     者：焦胜博 程礼 李晓微 李培源 高君宇 

作者机构：Aeronautics and Astronautics Engineering CollegeAir Force Engineering University School of SoftwareXiDian University 

出 版 物：《Transactions of Nanjing University of Aeronautics and Astronautics》 (南京航空航天大学学报（英文版）)

年 卷 期：2015年第32卷第3期

页      面：279-288页

核心收录：

学科分类：080202[工学-机械电子工程] 08[工学] 0802[工学-机械工程] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(No.51175509) 

主　　题：attached eddy current sensor semi-analytical model 

摘      要：Fatigue damage monitoring is critical metallic structure health monitoring of *** sensor should be high sensitive,easy to be integrated into structure and well adaptable for poor working ***,an attached eddy current sensor with flexible plane is put forward and its characteristics are *** extracting material′s conductivity as the crack features,forward semi-analytical model is established and parameter optimizations are carried *** perturbation model of attached eddy current sensor is constructed,and perturbation voltages of sensing channels under three-dimension structural crack are *** verify the sensor′s performance,monitoring experiment on crack extension is conducted under condition of 3 MHz *** validation experimental results show that perturbation model of 2A12-T4 aluminum alloy agrees well with experiment results,and perturbation model errors of four sensing channels are within 25%.The attached eddy current sensor is capable of testing the crack nondestructively and measuring the crack extension quantitatively with the accuracy of 1mm.