Deep flaw detection with giant magnetoresistive (GMR) based self-nulling probe

Wincheski, Buzz; Namkung, M.

doi:10.1063/1.1306085

Cited by 21 publications

(15 citation statements)

References 4 publications

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“…The use of a magneto-resistive device as the magnetic field sensor enables efficient monitoring of magnetic fields at frequencies from DC to megahertz. While the low frequencies capabilities of magneto-resisitive sensor based eddy current probes have been presented in the past [1][2][3][4][5], the current design adds capabilities for high frequency high spatial resolution of surface breaking defects. Along with the probe design, finite element modeling and experimental verification of the high frequency operation of the device has been presented.…”

Section: Discussionmentioning

confidence: 99%

“…The design of the wide bandwidth magneto-resistive sensor was conceived based upon adding high resolution near surface material characterization capabilities to the magneto-resistive flux focusing eddy current probe [1,5]. A schematic diagram of the probe, developed for deep flaw detection in multi-layer structures, is shown in figure 1.…”

Section: Magneto-resistive Flux Focusing Eddy Current Probementioning

confidence: 99%

“…The focus of these efforts has been the development of sensors that can operate at very low frequencies without a loss of sensitivity to the magnetic field, leading to the development of systems with flaw detection capabilities at centimeter-scale flaw depths [1][2]. In this work the high frequency capabilities and small spatial size of typical magneto-resistive sensors is explored for the development of high resolution near surface material characterization.…”

Section: Introductionmentioning

confidence: 99%

“…The use of magneto-resistive sensors in the fabrication of novel eddy current probes has been performed by several groups over the last decade [1][2][3][4][5]. The focus of these efforts has been the development of sensors that can operate at very low frequencies without a loss of sensitivity to the magnetic field, leading to the development of systems with flaw detection capabilities at centimeter-scale flaw depths [1][2].…”

Section: Introductionmentioning

confidence: 99%

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Development and Application of Wide Bandwidth Magneto-Resistive Sensor Based Eddy Current Probe

Wincheski

Simpson

2011

AIP Conference Proceedings

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ABSTRACT. The integration of magneto-resistive sensors into eddy current probes can significantly expand the capabilities of conventional eddy current nondestructive evaluation techniques. The room temperature solid-state sensors have typical bandwidths in the megahertz range and resolutions of tens of microgauss. The low frequency sensitivity of magneto-resistive sensors has been capitalized upon in previous research to fabricate very low frequency eddy current sensors for deep flaw detection in multilayer conductors. In this work a modified probe design is presented to expand the capabilities of the device. The new probe design incorporates a dual induction source enabling operation from low frequency deep flaw detection to high frequency high resolution near surface material characterization. Applications of the probe for the detection of localized near surface conductivity anomalies are presented. Finite element modeling of the probe is shown to be in good agreement with experimental measurements.

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Section: Discussionmentioning

confidence: 99%

Section: Magneto-resistive Flux Focusing Eddy Current Probementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development and Application of Wide Bandwidth Magneto-Resistive Sensor Based Eddy Current Probe

Wincheski

Simpson

2011

AIP Conference Proceedings

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“…Using such probes, several groups have shown flaw detection capabilities at centimeter-scale flaw depths with room temperature magnetic field sensors [9,10]. Most of this work was accomplished using either anisotropic magneto-resistive (AMR) or giant magneto-resistive (GMR) sensors.…”

Section: Introductionmentioning

confidence: 99%