New Eddy Current Probe for Vibration Signal Suppression

Kosaka, Daigo; Kumakura, Yuji; Kojima, Fumio; Yamasaki, Hiroyuki

doi:10.1109/tmag.2021.3081441

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…The relationship between the phase and the coil distance was discussed in Ref. [8]. The displacement signal of the dual induction mode, 𝑑 ̇𝑑𝑢𝑎𝑙 , is shown in the following equation.…”

Section: A Dual Induction Methodsmentioning

confidence: 99%

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Dual Induction Eddy Current Probe for Vibration Noise Reduction

Kosaka

Kumakura²,

Kojima

2023

IEEE Trans. Magn.

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In eddy current testing, signals originating from product vibration and cracks are detected. Frequency filtering methods are widely used, such as vibration signal suppression. However, this method is not effective when the difference between the frequencies of the vibration and crack signals is small. We have proposed a dual induction method with passive vibration signal suppression that does not require active signal processing such as the frequency filtering method. This paper quantitatively describes the performance of a dual induction eddy current probe that selectively suppresses only the vibration signal from detection signals, comparing this with the frequency filtering method and the multi-frequency method. Simulation and measurement results show that the proposed probe suppresses vibration signals and does not suppress crack signals; however the current methods suppress both signals. The obtained results suggest that the proposed method provides a higher signal-to-noise ratio than the current method.

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Section: A Dual Induction Methodsmentioning

confidence: 99%

“…We have proposed a new ECT probe with passive vibration signal suppression that eliminates the need for the active signal processing and the multi-channel detection equipment [8]. As is well known, noise-canceling headphones reduce noise by generating a sound that has the same amplitude as the noise and the opposite phase of the noise.…”

Section: Introductionmentioning

confidence: 99%