Thickness Dependence of Low Frequency Eddy Current Signals in Carbon Steel Plate

2020 ◽  
Vol 30 (6) ◽  
pp. 201-204
Author(s):  
Seok Soo Yoon ◽  
Dong Young Kim
Keyword(s):  
Carbon Steel ◽  
Eddy Current ◽  
Steel Plate ◽  
Low Frequency ◽  
Thickness Dependence

scholarly journals Research on Detection Mechanism of Weld Defects of Carbon Steel Plate Based on Orthogonal Axial Eddy Current Probe

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5515
Author(s):  
Linnan Huang ◽  
Chunhui Liao ◽  
Xiaochun Song ◽  
Tao Chen ◽  
Xu Zhang ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Eddy Current ◽  
Steel Plate ◽  
Difficult Problem ◽  
Eddy Current Testing ◽  
Detection Sensitivity ◽  
Detection Mechanism ◽  
Current Testing ◽  
Weld Defects ◽  
Lift Off

The uneven surface of the weld seam makes eddy current testing more susceptible to the lift-off effect of the probe. Therefore, the defect of carbon steel plate welds has always been a difficult problem in eddy current testing. This study aimed to design a new type of eddy current orthogonal axial probe and establish the finite element simulation model of the probe. The effect of the probe structure, coil turns, and coil size on the detection sensitivity was simulated. Further, a designed orthogonal axial probe was used to conduct a systematic experiment on the weld of carbon steel specimens, and the 0.2 mm width and 1 mm depth of weld defects of carbon steel plates were effectively detected. The experimental results showed that the new orthogonal axial eddy current probe effectively suppressed the unevenness effect of the weld surface on the lift-off effect during the detection process.

Depth Evaluation of Slits on Galvanized Steel Plate Using a Low Frequency Eddy Current Probe

2020 ◽  
pp. 59-66
Author(s):  
N. A. Nadzri ◽  
M. M. Saari ◽  
M. A. H. P. Zaini ◽  
A. M. Halil ◽  
A. J. S. Hanifah ◽  
...  
Keyword(s):  
Eddy Current ◽  
Steel Plate ◽  
Low Frequency ◽  
Galvanized Steel

Design of orthogonal eddy-current probe for weld crack detection of carbon-steel plate

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1347-1355
Author(s):  
Tao Chen ◽  
Xiaoqi Xiao ◽  
Lihong Zhang ◽  
Cheng Lv ◽  
Zhiyang Deng ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Eddy Current ◽  
Crack Detection ◽  
Steel Plate ◽  
Signal To Noise Ratio ◽  
Detection Sensitivity ◽  
Scanning Angle ◽  
Length Width ◽  
Lift Off ◽  
Detection Effect

Due to uneven surface and lift-off effect, it is difficult to detect weld crack by eddy-current testing. A new orthogonal eddy-current probe for weld crack detection of carbon-steel plate was designed in this paper. Based on COMSOL Multiphysics, the influence of scanning angle on detection sensitivity of the probe was compared firstly. Then, the effects of coil width, coil side length, detection coil height, and lift-off distance on detection sensitivity of the probe were studied, respectively. Finally, the test piece of carbon-steel plate weld with crack, and the physical probe used to verify the crack detection effect were made. The experimental results show that the weld crack of carbon-steel plate with length × width × depth of 20.0 mm × 0.3 mm × 1 mm can be effectively identified, and the lift-off noise can be effectively suppressed by the method presented in this paper. At the same time, the signal-to-noise ratio of the probe keeps constant in the lift-off distance range of 0.3 mm–3.0 mm.

Detection of Slit Defects on Backside of Steel Plate Using Low-Frequency Eddy-Current Testing

2018 ◽  
Vol 54 (11) ◽  
pp. 1-5 ◽  
Author(s):  
Wataru Yoshimura ◽  
Ryo Tanaka ◽  
Teruyoshi Sasayama ◽  
Keiji Enpuku
Keyword(s):  
Eddy Current ◽  
Steel Plate ◽  
Low Frequency ◽  
Eddy Current Testing ◽  
Current Testing

scholarly journals Extraction of Flux Leakage and Eddy Current Signals Induced by Submillimeter Backside Slits on Carbon Steel Plate using A Low-Field AMR Differential Magnetic Probe

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Mohd Aufa Hadi Putera Zaini ◽  
Mohd Mawardi Saari ◽  
Nurul Arin Nadzri ◽  
Zulkifly Aziz ◽  
Nur Huda Ramlan ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Eddy Current ◽  
Steel Plate ◽  
Magnetic Probe ◽  
Low Field ◽  
Flux Leakage
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