Multiple sensors on pulsed eddy-current detection for 3-D subsurface crack assessment

Tian, Gui Yun; Sophian, Ali; Taylor, David J.; Rudlin, John

doi:10.1109/jsen.2004.839129

Cited by 156 publications

(62 citation statements)

References 14 publications

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“…Interested readers are referred to papers by Jander et al [158], and Tian and his research groups [159][160][161]. For information on high spatial resolution, magnetic field induced thermal imaging techniques, interested readers are referred to paper by Cui et al [162].…”

Section: Potential Applicationsmentioning

confidence: 99%

Ferromagnetic Multilayers: Magnetoresistance, Magnetic Anisotropy, and Beyond

2016

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Abstract:Obtaining highly sensitive ferromagnetic, FM, and nonmagnetic, NM, multilayers with a large room-temperature magnetoresistance, MR, and strong magnetic anisotropy, MA, under a small externally applied magnetic field, H, remains a subject of scientific and technical interest. Recent advances in nanofabrication and characterization techniques have further opened up several new ways through which MR, sensitivity to H, and MA of the FM/NM multilayers could be dramatically improved in miniature devices such as smart spin-valves based biosensors, non-volatile magnetic random access memory, and spin transfer torque nano-oscillators. This review presents in detail the fabrication and characterization of a few representative FM/NM multilayered films-including the nature and origin of MR, mechanism associated with spin-dependent conductivity and artificial generation of MA. In particular, a special attention is given to the Pulsed-current deposition technique and on the potential industrial applications and future prospects. FM multilayers presented in this review are already used in real-life applications such as magnetic sensors in automobile and computer industries. These material are extremely important as they have the capability to efficiently replace presently used magnetic sensors in automobile, electronics, biophysics, and medicine, among many others.

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Section: Potential Applicationsmentioning

confidence: 99%

Ferromagnetic Multilayers: Magnetoresistance, Magnetic Anisotropy, and Beyond

2016

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“…Application of multiple inspection techniques for NDE fusion is presented in increasing (Tian et al, 2005); (Volponi et al, 2004) and (Kaftandjian et al, 2005).…”

Section: Fusion Of Other Nde Modalitiesmentioning

confidence: 99%

“…These techniques can work at some distance below the surface (up to 100 mm in aluminum) (Tian et al, 2005). In PEC techniques the probe's excitation coil is excited with a repetitive broadband pulse, usually a rectangular wave.…”

Section: Pulsed Eddy Current Imagingmentioning

confidence: 99%

Image Fusion Based Enhancement of Nondestructive Evaluation Systems

Elshafiey¹,

Algarni²,

Alkanhal³

2011

Image Fusion

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“…For scanned measurements, such as those presented in this paper, a single GMR sensor may miss defects if the excitation repetition rate and speed of analysis are too low compared to the scanning speed. To reduce the chance of this occurring, an array of three GMR sensors was used to increase sample coverage, as shown in Figure 3(a) [19]. For sizing defects the sum of the peak values of sensors 1 and 3 is used.…”

Section: Experimental Techniquesmentioning

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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Multiple sensors on pulsed eddy-current detection for 3-D subsurface crack assessment

Cited by 156 publications

References 14 publications

Ferromagnetic Multilayers: Magnetoresistance, Magnetic Anisotropy, and Beyond

Ferromagnetic Multilayers: Magnetoresistance, Magnetic Anisotropy, and Beyond

Image Fusion Based Enhancement of Nondestructive Evaluation Systems

Data fusion for defect characterisation using a dual probe system

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