Analysis of the inducing frequency of a U-shaped ACFM system

Li, Wei; Chen, Guo-Ming; Li, Wenyan; Li, Zhun; Liu, Feng

doi:10.1016/j.ndteint.2010.10.009

Cited by 35 publications

(11 citation statements)

References 5 publications

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“…Other electromagnetic NDE methods have also been investigated for detecting features on metals. These techniques include the eddy current technique [9,10], the AC field measurement (ACFM) method [11], the magnetostrictive sensor technique [12], the non-contact AC potential drop method using a high impedance electric potential sensor [13], the magnetic flux leakage method [14], etc. In recent years, there have been several notable advances in the above mentioned NDE technique stemming from research to detect corrosion and other types of defects in metallic components, such as the pulsed eddy current approach [15][16][17][18], the magneto-optical imaging of eddy current [19], the transient-pulsed thermography technique [20], the eddy current induced thermography [21,22], etc.…”

Section: Introductionmentioning

confidence: 99%

Detecting surface features on conducting specimens through an insulation layer using a capacitive imaging technique

Yin

Hutchins

Chen

2012

NDT & E International

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Section: Introductionmentioning

confidence: 99%

Detecting surface features on conducting specimens through an insulation layer using a capacitive imaging technique

Yin

Hutchins

Chen

2012

NDT & E International

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“…Present the model with two independent parameters for a range of thickness, conductivity, and lift-offs Wei et al 115 Design alternating current field measurement (ACFM) system…”

Section: Resultsmentioning

confidence: 99%

Challenges in improving the performance of eddy current testing: Review

Abdalla

Faraj

Samsuri

et al. 2018

Measurement and Control

124

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Eddy current testing plays an important role in numerous industries, particularly in material coating, nuclear and oil and gas. However, the eddy current testing technique still needs to focus on the details of probe structure and its application. This paper presents an overview of eddy current testing technique and the probe structure design factors that affect the accuracy of crack detection. The first part focuses on the development of different types of eddy current testing probes and their advantages and disadvantages. A review of previous studies that examined testing samples, eddy current testing probe structures and a review of factors contributing to eddy current signals is also presented. The second part mainly comprised an in-depth discussion of the lift-off effect with particular consideration of ensuring that defects are correctly measured, and the eddy current testing probes are optimized. Finally, a comprehensive review of previous studies on the application of intelligent eddy current testing crack detection in non destructive eddy current testing is presented.

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“…Different crack length and orientation as well as different injected current and frequency are applied to the model to study the optimized parameters for ACFM weld defects inspection. Figure 1 demonstrates the simulation models that are composed of the plate, crack, U-shaped magnetic core [9], weld, and the excitation coil through which the injected current are applied. Table 1 shows the parameters of the established model.…”

Section: Simulation Model Set-up and Methodologymentioning

confidence: 99%

Detection and evaluation of weld defects in stainless steel using alternating current field measurement

Weili¹,

Ma²,

Pan-Qi³

et al. 2018

AIP Conference Proceedings

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An ultrasonic non-destructive testing method for the measurement of weld width in laser welding of stainless steel AIP Conference Proceedings 1890, 040082 (2017) Abstract. Stainless steel is widely used in nuclear power plants, such as various high-radioactive pool, tools storage and fuel transportation channel, and serves as an important barrier to stop the leakage of high-radioactive material. NonDestructive Evaluation (NDE) methods, eddy current testing (ET), ultrasonic examination (UT), penetration testing (PT) and hybrid detection method, etc., have been introduced into the inspection of a nuclear plant. In this paper, the Alternating Current Field Measurement (ACFM) was fully applied to detect and evaluate the defects in the welds of the stainless steel. Simulations were carried out on different defect types, crack lengths, and orientation to reveal the relationship between the signals and dimensions to determine whether methods could be validated by the experiment. A 3-axis ACFM probe was developed and three plates including 16 defects, which served in nuclear plant before, were examined by automatic detection equipment. The result shows that the minimum detectable crack length on the surface is 2mm and ACFM shows excellent inspection results for a weld in stainless steel and gives an encouraging prospect of broader application.

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Analysis of the inducing frequency of a U-shaped ACFM system

Cited by 35 publications

References 5 publications

Detecting surface features on conducting specimens through an insulation layer using a capacitive imaging technique

Detecting surface features on conducting specimens through an insulation layer using a capacitive imaging technique

Challenges in improving the performance of eddy current testing: Review

Detection and evaluation of weld defects in stainless steel using alternating current field measurement

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