Research on spectral response of pulsed eddy current and NDE applications

被引：59
作者：
Tian, Gui Yun [1 ,2 ]
He, Yunze [3 ]
Adewale, Ibukun [1 ]
Simm, Anthony [1 ]
机构：
[1] Newcastle Univ, Sch Elect & Elect Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[2] Chongqing Univ, State Key Lab Mech Transmiss, Chongqing, Peoples R China
[3] Natl Univ Def Technol, Coll Mechatron & Automat, Changsha 410073, Hunan, Peoples R China
来源：
SENSORS AND ACTUATORS A-PHYSICAL | 2013年 / 189卷
基金：
英国工程与自然科学研究理事会;
关键词：
Non-destructive testing (NDT); Pulsed eddy current; Spectral response; Electrical conductivity; Permeability; FEATURE-EXTRACTION TECHNIQUE; DEFECT CLASSIFICATION; THICKNESS VARIATION; COMPONENT ANALYSIS; TRANSIENT; CORROSION;
D O I：
10.1016/j.sna.2012.10.011
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Using pulsed excitation, pulsed eddy current (PEC) technique generates responses over a wide range of frequencies, containing more information than traditional eddy current inspection in the frequency domain. This paper investigates the spectral response of PEC under varying probe lift-off, material properties (electrical conductivity and magnetic permeability) and directional tensile stress. It is shown that material properties and lift-off exhibit different spectra patterns. Using normalisation in frequency domain, the lift-off effect can be reduced. Spectra for both electrical conductivity and magnetic permeability show a complex pattern. Tensile stress measurement in aluminium 2024 and 5083 is investigated, which show similar spectra pattern to electrical conductivity variation. Applications for corrosion characterisation, displacement measurement and profile inspection can be developed in the future in conjunction with time-domain features. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：313 / 320
页数：8
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