Identification of crack depths from eddy current testing signal

1998 ◽  
Vol 34 (5) ◽  
pp. 2893-2896 ◽  
Author(s):  
H. Fukutomi ◽  
H. Huang ◽  
T. Takagi ◽  
J. Tani
Keyword(s):  
Eddy Current ◽  
Eddy Current Testing ◽  
Current Testing ◽  
Testing Signal

Eddy Current Testing Sensor Design and Comparative Experiment Study Based on Amorphous Alloy

2012 ◽  
Vol 182-183 ◽  
pp. 416-421
Author(s):  
Lin Yu Yang ◽  
Run Qiao Yu ◽  
Yu Lan Qiu
Keyword(s):  
Amorphous Alloy ◽  
Eddy Current ◽  
Eddy Current Testing ◽  
High Permeability ◽  
Mnzn Ferrite ◽  
Current Testing ◽  
Sensor Performance ◽  
Ferrite Material ◽  
Testing Signal ◽  
New Sensors

After comparing the principle features of MnZn ferrite material of high permeability and amorphous alloy of FeCuNbSiB, this paper produced an improved solution to sensor performance by applying highly magnetic non-brilliant alloy of iron base to the testing windings of eddy current testing sensors and designed the two-dimensional decomposition testing circuit in terms of sensor testing signal. It ended with a comparison between new sensors and traditional ferrite winding sensors in terms of sensibility and linearity. The experiment results showed that the new eddy current sensors have much better sensibility and linearity compared with their traditional peers.

Investigation on Multifrequency Eddy Current Testing Signal Analysis for Nondestructive Inspection of Steam Generator Tubes

2006 ◽  
Vol 321-323 ◽  
pp. 460-463
Author(s):  
Hee Jun Jung ◽  
Sung Jin Song ◽  
Chang Hwan Kim ◽  
Joo Young Yoo ◽  
Young Hwan Choi ◽  
...  
Keyword(s):  
Steam Generator ◽  
Eddy Current ◽  
Nuclear Power ◽  
Power Plants ◽  
Eddy Current Testing ◽  
Transform Method ◽  
Current Testing ◽  
Testing Signal ◽  
Steam Generator Tubes ◽  
Supporting Structures

For inspection of steam generator tubes in nuclear power plants using eddy current testing, it is a very crucial task to extract the flaw signal from signals compounded by flaws and supporting structures. To perform such an important task, the multifrequency eddy current testing method is widely adopted. In this study, we explore the performance of a linear mixing technique based on the discrete cosine transform method by experiments. The results obtained using the DCT based method agree very well to those obtained by commercial software demonstrating the effectiveness of the approach.

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