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| Discussion on the influence of artificial slot width on eddy current testing signal |
| SHAO Changlu, LIU Qiang, WANG Ping |
| Dong Bei Special Steel Group Co., Ltd., Dalian 116105, China |
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Abstract The length, width and depth of the artificial groove on the surface of the comparison sample rod for eddy current testing can affect the amplitude and phase of the eddy current testing signal. Five artificial U-shaped groove samples with same length and depth but different width were continuously detected for 10 times using point type eddy current testing system. The signal amplitude and signal phase data in ten tests were compared and analyzed. It was found that the width of artificial U-shaped groove has a small influence on the amplitude and height of the eddy current testing signal, and the phase value of the eddy current testing signal gradually increased with the increase of width of artificial U-shaped groove. This study provided theoretical support for the production of artificial defects on the comparison sample rod as well as analyzing and judging the size information of defects.
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Received: 10 July 2023
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2023, Vol. 41 
