Pulsed Eddy Current Technology: Characterizing Material Loss with Gap and Lift-off Variations

Giguere, S.; Lepine, B. A.; Dubois, J. M. S.

doi:10.1080/09349840108968182

Cited by 31 publications

(39 citation statements)

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“…This is the mechanism of the probe vibration. Similar rising (lift-off) phenomena were reported in previous studies (Bihan, 2002;Giguere et al, 2001;Tian and Sophian, 2005), but significant vibration was not reported in these studies. Relatively severe vibration induced by this rising phenomenon is a peculiar characteristic of this study.…”

Section: Entire Behavior Of Probesupporting

confidence: 72%

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Vibration Analysis of a Moving Probe with Long Cable for Defect Detection of Helical Tubes

Inoue¹,

Sueoka²

2011

Advances in Vibration Analysis Research

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Section: Entire Behavior Of Probesupporting

confidence: 72%

“…It made the detection of defects difficult. Some papers reported similar problems (Bihan, 2002;Giguere et al, 2001;Tian and Sophian, 2005), but a large vibration of the probe was not involved. A key to the problem is that the noise in the signal was accompanied with the hard vibration.…”

Section: Introductionmentioning

confidence: 94%

Vibration Analysis of a Moving Probe with Long Cable for Defect Detection of Helical Tubes

Inoue¹,

Sueoka²

2011

Advances in Vibration Analysis Research

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“…Both techniques deployed in the dual probe are non-contact and require no couplant, lending the possibility of using the dual probe in hot or moving environments. Standoffs of several millimetres are possible, with typical standoffs around 1 mm [10,12,14,16,17].…”

Section: Introductionmentioning

confidence: 99%

“…The ability to reliably detect the former has obvious safety implications, while the ability to detect surface defects in billets allows companies to increase competitiveness through assurance of a higher quality product. The two techniques chosen are pulsed eddy current (PEC) [8][9][10] and ultrasonics, which, when using surface ultrasonic wave techniques, are both sensitive to surface and near surface defects in metal samples [11,12]. Improvements in the accuracy of depth information is gained by analysing results concurrently and performing data fusion on the depth information from each system, with each technique being more sensitive than the other to a slightly different range of defect depths [4,5].…”

Section: Introductionmentioning

confidence: 99%

Data fusion for defect characterisation using a dual probe system

Edwards

Sophian

Dixon

et al. 2008

Sensors and Actuators A: Physical

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We present recent work on a dual probe system containing electromagnetic acoustic transducers (EMATs) generating and detecting surface ultrasonic waves, and a pulsed eddy current (PEC) probe. This system is able to detect and size surface and near-surface defects in electrically conducting samples by looking at changes in the detected signal for each probe. By combining the information from each probe using a weighted logic function for data fusion, it is possible to both classify and size defects, with increased reliability. By combining the data in this way one obtains information about the defects which is not available when using either probe in isolation. Typical results on steel and aluminium samples are presented, along with information about the data fusion function. The dual probe and data fusion routine has been demonstrated to work at manualscanning speeds, with higher speeds possible following some simple improvements to the system.

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“…Eddy current testing can be used such as perfect tool to characterize defects in materials [5]. However, the sensitivity of the characterization process is highly dependent on the probe choice and the operation frequency [6].…”

Section: Introductionmentioning

confidence: 99%