A Novel Compensation Algorithm for Thickness Measurement Immune to Lift-Off Variations Using Eddy Current Method

被引：92

作者：

Lu, Mingyang ^{[1
]}

Yin, Liyuan ^{[2
]}

Peyton, Anthony J. ^{[1
]}

Yin, Wuliang ^{[1
]}

机构：

[1] Univ Manchester, Sch Elect & Elect Engn, Manchester M60 1QD, Lancs, England

[2] Kunming Sci & Technol Univ, Kunming 650051, Peoples R China

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2016年 / 65卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

Eddy current testing; lift-off variation; new compensation algorithm; thickness measurement; FERRITE/AUSTENITE PHASE FRACTION; ELECTROMAGNETIC SENSOR; METALLIC LAYERS; MULTIFREQUENCY; CONDUCTIVITY; PERMEABILITY; PLATES; IMPEDANCE;

D O I：

10.1109/TIM.2016.2600918

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：

Lift-off variation causes errors in the eddy current thickness measurements of metallic plates. In this paper, we have developed an algorithm that can compensate for this variation and produce an index that is linked to the thickness, but is virtually independent of lift-off. This index, termed as the compensated peak frequency, can be obtained from the measured multifrequency inductance spectral data using the algorithm we developed in this paper. This method has been derived through mathematical manipulation and verified by both the simulation and experimental data. Accuracy in the thickness measurements at different lift-offs proved to be within 2%.

引用

页码：2773 / 2779

页数：7

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