Steel Corrosion Characterization Using Pulsed Eddy Current Systems

He, Yunze; Tian, Guohui; Zhou, Hong; Alamin, Mohammed; Simm, Anthony; Jackson, P. W.

doi:10.1109/jsen.2012.2184280

Cited by 179 publications

(99 citation statements)

References 35 publications

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“…The maximum of B is extracted as first feature (max(B)), which can represent the magnetic field intensity. If the material under test is a ferromagnetic material, this feature can represent the permeability of material and there is a positive monotonic relationship between max(B) and permeability [19]. For non-magnetic material, permeability is unity and PEC response is mainly affected by conductivity, lift-off and other parameters.…”

Section: Pec Feature Extractionmentioning

confidence: 99%

“…Pulsed eddy current (PEC) technique is an important advance over other EC methods, which has been proved as an effective tool for flaw detection and corrosion detection in metals [15][16][17]. In previous works, various features are selected and used to represent the conductivity change by stress in aluminium [18] and permeability variation in steel corrosion [19]. In this paper, scanning PEC is applied in detection and evaluation of defects in CFRP laminates and honeycomb sandwich panels, and appropriate features are extracted to characterise the surface impact defects and inner delamination.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Non-destructive testing of low-energy impact in CFRP laminates and interior defects in honeycomb sandwich using scanning pulsed eddy current

Tian

Pan

et al. 2014

Composites Part B: Engineering

Self Cite

129

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a b s t r a c tWith the growing interest to use composite materials and honeycomb sandwich panels in industrial fields, much attention is devoted to the development of non-destructive testing (NDT) techniques for the detection and evaluation of defects. In this work, scanning pulsed eddy current (PEC) was investigated and two features, representing the magnetic field intensity and conductivity, were used to characterise the different types of defects in carbon fibre reinforced plastics (CFRP) laminates and honeycomb sandwich panels. The experimental results show that the low energy impact from 4 J to 12 J, conductive and non-conductive insert defects can be effectively detected and evaluated using the proposed methods. The effectiveness was verified and the advantages of scanning PEC were addressed through comparative studies with flash thermography and shearography.

show abstract

Section: Pec Feature Extractionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Non-destructive testing of low-energy impact in CFRP laminates and interior defects in honeycomb sandwich using scanning pulsed eddy current

Tian

Pan

et al. 2014

Composites Part B: Engineering

Self Cite

129

View full text Add to dashboard Cite

show abstract

“…Recent developments for monitoring atmospheric corrosion including using electric resistance sensors [30,31], pulsed Eddy current testing (ECT) [32], and passive wireless sensors [33]. In addition to new methods, in order to develop the atmospheric corrosion monitoring (ACM) sensor, many researchers also investigated various characteristics of corrosion.…”

Section: Introductionmentioning

confidence: 99%

Development of Amplifier Circuit by Active-Dummy Method for Atmospheric Corrosion Monitoring in Steel Based on Strain Measurement

Purwasih

Kasai

Okazaki

et al. 2017

Metals

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This paper describes an amplifier circuit fabricated by the active-dummy method for atmospheric corrosion monitoring based on strain measurement. The circuit was used to determine the relationship between the voltage and strain. Experiments involving the thickness reduction of low-carbon steel test pieces induced by galvanostatic electrolysis were carried out with the amplifier circuit. The circuit was capable of accurately measuring signals induced by the thickness reduction of the test piece. Moreover, the circuit was assessed for the effects of environmental temperature drift, and was found to exhibit a high tolerance. The proposed amplifier circuit would be suitable for atmospheric corrosion monitoring in many types of infrastructure.

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“…A difference in the levels of magnetic field penetration can be correlated to the existence of local flaws or defects [12]. The flaw can be due to corrosion, weld defects, cracks, fatigue, or deformation [13], [14], [15]. The resultant data collected from this process is typically characterized by low signal to noise ratio.…”

Section: Introductionmentioning

confidence: 99%

Rényi Entropy Filter for Anomaly Detection With Eddy Current Remote Field Sensors

2015

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Abstract-We consider a multi-channel remote field eddy current sensor apparatus, which is installed on a mobile robot which is deployed in pipelines with the mission of detection defects. Features in raw sensory data that are associated with defects could be masked by noise and therefore difficult to identify in some instances. In order to enhance these features that potentially identify defects, we propose an entropy filter that maps raw sensory data points into a local entropy measure. In the entropy space, data is then classified by means of a thresholding procedure based on the Neymnan-Pearson criterion. The effectiveness of the algorithm is demonstrated by applying it to different data sets obtained from field trials.

show abstract

Steel Corrosion Characterization Using Pulsed Eddy Current Systems

Cited by 179 publications

References 35 publications

Non-destructive testing of low-energy impact in CFRP laminates and interior defects in honeycomb sandwich using scanning pulsed eddy current

Non-destructive testing of low-energy impact in CFRP laminates and interior defects in honeycomb sandwich using scanning pulsed eddy current

Development of Amplifier Circuit by Active-Dummy Method for Atmospheric Corrosion Monitoring in Steel Based on Strain Measurement

Rényi Entropy Filter for Anomaly Detection With Eddy Current Remote Field Sensors

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