Liftoff Correction Based on the Spatial Spectral Behavior of Eddy-Current Images

被引：32

作者：

Ribeiro, A. Lopes ^{[1
]}

Alegria, Francisco ^{[1
,2
]}

Postolache, Octavian A. ^{[1
,2
]}

Geirinhas Ramos, Helena Maria ^{[2
]}

机构：

[1] Univ Tecn Lisboa, Inst Telecomunicacoes, P-1049001 Lisbon, Portugal

[2] Univ Tecn Lisboa, Inst Super Tecn, P-1049001 Lisbon, Portugal

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2010年 / 59卷 / 05期

关键词：

Eddy currents; giant magnetoresistance; liftoff effect; nondestructive testing; spectral analysis; CONDUCTIVITY; CRACK;

D O I：

10.1109/TIM.2010.2043981

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：

In this paper, a new processing scheme for compensating the liftoff effect is proposed to increase the signal-to-noise ratio of measurements carried out when a duralumin plate with artificially manufactured defects was scanned with eddy-current probes. The mathematical algorithm is based on the spatial frequency behavior of the output signals with the liftoff distance (the distance between the probe used for inspection and the sample) and its equivalent form (deconvolution) in the spatial domain. Results are presented for measurements performed at three different distances for the same defect of the duralumin plate.

引用

页码：1362 / 1367

页数：6

共 17 条

[1] Lift-off effect in high-frequency eddy current conductivity spectroscopy [J].

Abu-Nabah, Bassam A. ;

Nagy, Peter B. .

NDT & E INTERNATIONAL, 2007, 40 (08) :555-565

[2] Crack shape reconstruction in eddy current testing using machine learning systems for regression [J].

Bernieri, Andrea ;

Ferrigno, Luigi ;

Laracca, Marco ;

Molinara, Mario .

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 2008, 57 (09) :1958-1968

[3] Dimensioning and Characterization of a New Magnetic Induction Tomography Experimental Setup [J].

Bras, Nuno B. ;

Pestana, Alexandre ;

Martins, Rafil C. ;

Serra, Antnio C. .

2008 IEEE INSTRUMENTATION AND MEASUREMENT TECHNOLOGY CONFERENCE, VOLS 1-5, 2008, :2131-2136

[4] Giant magnetoresistance-based eddy-current sensor [J].

Dogaru, T ;

Smith, ST .

IEEE TRANSACTIONS ON MAGNETICS, 2001, 37 (05) :3831-3838

[5]

Ida N., 1982, J. Nondestruct. Eval, V3, P147, DOI DOI 10.1007/BF00566556

[6] Characterization of ductile cast iron by eddy current method [J].

Konoplyuk, S ;

Abe, T ;

Uchimoto, T ;

Takagi, T ;

Kurosawa, M .

NDT & E INTERNATIONAL, 2005, 38 (08) :623-626

[7]

KREUTZBRUCK MV, 2000, P 15 ECNDT

[8]

Mee C.D., 1996, Magnetic Recording Technology, V2nd

[9] THICKNESS AND CONDUCTIVITY OF METALLIC LAYERS FROM EDDY-CURRENT MEASUREMENTS [J].

MOULDER, JC ;

UZAL, E ;

ROSE, JH .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1992, 63 (06) :3455-3465

[10] A GMR-based eddy current system for NDE of aircraft structures [J].

Nair, Naveen V. ;

Melapudi, Vikram R. ;

Jimenez, Hector R. ;

Liu, Xin ;

Deng, Yiming ;

Zeng, Zhiwei ;

Udpa, Lalita ;

Moran, Thomas J. ;

Udpa, Satish S. .

IEEE TRANSACTIONS ON MAGNETICS, 2006, 42 (10) :3312-3314

← 1 2 →