Investigation on Velocity Effect in Pulsed Eddy Current Technique for Detection Cracks in Ferromagnetic Material

Yuan, Fei; Yu, Yating; Liu, Bowen; Tian, Gui Yun

doi:10.1109/tmag.2020.3012341

Cited by 20 publications

(5 citation statements)

References 23 publications

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“…The faster the detection speed is, the shorter the eddy current generation time is, which leads to a decrease in the secondary magnetic field intensity. In addition, the motion-induced eddy current (MIEC) will be produced in the specimen because of the relative motion, and MIEC distributed in the rear part of the driver coil along the moving direction will increase the eddy current caused by induced by B [22], as shown in Figure 2. The above-mentioned decrease in the secondary magnetic field intensity and the change in MIEC are both caused by a change in speed.…”

Section: Theoretical Analysis Of Eddy Current Testing Under Motion Co...mentioning

confidence: 99%

“…Xu et al [21] proposed a multi-frequency composited electromagnetic detection method that can also suppress the attenuation of the eddy current signal as speed increases. Yuan et al [22] investigated the velocity effect of the PEC technique, their results indicated that the velocity effect can change the baseline of the detection signal in the PEC inspection system. In addition, Piao et al [23] proposed a novel method to discriminate inner/outer diameter defects by taking advantage of the conductivity-dependent and permeability-dependent distribution of induced eddy current on the inner diameter surface of steel pipes in high-speed eddy current testing.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of rolling contact fatigue cracks using the transmitter-receiver eddy current testing under moving conditions

Tian

et al. 2023

Nondestructive Testing and Evaluation

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Rolling contact fatigue (RCF) cracks online detection using eddy current testing (ECT) is in urgent demand. However, RCF cracks detection and evaluation in this way under moving conditions remains challenging due to the velocity effect in ECT. This paper aims to study the response of a transmitter-receiver eddy current probe to cracks under moving conditions and evaluate the depth and inclination angle of RCF cracks. In this paper, a high-speed eddy current testing system is developed to experimentally investigate the influence of coil gap, detection speed, and the lift-off on the eddy current probe's response under moving conditions. In addition, the temporal and amplitude features of the eddy current signal are extracted to characterise the depth and inclination angle of the RCF cracks. The experimental results indicate the eddy current probe's response can be improved by increasing the coil gap (coil centre distance) suitably, which can be done to compensate for the attenuation of the eddy current signal caused by detection speed and lift-off. The probe's response hardly changes with an increase in detection speed when the driver and pick-up coils of the eddy current probe completely overlap. The maximum root means square error (RMSE) of evaluation for crack depth at different detection speeds was 0.36 mm. The maximum evaluation error for the inclination angle of the RCF crack was 4.2° when the detection speed was constant.

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Section: Theoretical Analysis Of Eddy Current Testing Under Motion Co...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of rolling contact fatigue cracks using the transmitter-receiver eddy current testing under moving conditions

Tian

et al. 2023

Nondestructive Testing and Evaluation

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“…(Corresponding author: Bo Dang.) [13] and tool shell against downhole pressure [14] significantly affect the borehole PEC testing accuracy of metal pipes [15,16]. To improve the performance of borehole PEC technologies for metal casing or pipe evaluation, a number of studies have been conducted to understand the effect of the probe parameters of a PEC system [17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Space–Time Pulsed Eddy Current Array for NDT of Wellbore Casings Based on MIMO Technique

Liu,

Dang,

Yang

et al. 2024

IEEE Trans. Instrum. Meas.

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In this paper, we present a space-time pulsed eddy current (PEC) array for nondestructive testing (NDT) of wellbore casings using a multiple-input multiple-output (MIMO) technique. On the basis of a multilayered cylindrical wellbore model, a MIMO-PEC model is developed according to the phase shift characteristics of the PEC response corresponding to different transmitting-receiving (TR) distances. To achieve a more significant number of TR channels than in a traditional receiving array to reduce the complexity of the transmitting-receiving structure, a space-time transmission scheme is proposed to recover multiple TR channels. Moreover, a specific space-time MIMO array structure is designed to maximize the number of independent TR channels. The effectiveness of the proposed method is verified by applying the proposed MIMO array to a borehole PEC system for NDT of wellbore casings. The simulation and experimental results demonstrate that using the array structure and space-time transmission scheme proposed in this paper, a MIMO structure consisting of M transmitters and N receivers can be equivalent to a transceiver system with a single transmitter and M×N receivers. Thus, MIMO technique can be effectively applied to PEC-NDT systems and drastically reduce the cost and complexity of the PEC system.

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“…We need to detect the stress parts of metallic structures, or the position where cracks have occurred to ensure their safe and reliable operation. At present, common methods used in metallic crack detection and characterization include ultrasonic testing [8], eddy current testing [9], infrared thermal imaging [10], acoustic emission [11], and other nondestructive testing technologies. These nondestructive testing technologies have the disadvantages of complex system, expensive equipment, inconvenient installation and networking.…”

Section: Introductionmentioning

confidence: 99%

Passive Ultra High Frequency RFID sensor with reference tag for crack detection of aluminum alloy structure

Wang¹,

Dong²,

Wang³

et al. 2021

J. Inst.

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It can be ensured safe and reliable operation of a metallic structure by monitoring the positions which are easy to crack. Because the channel changes with the environment, a tag sensor in the ultra high frequency (UHF) is vulnerable to interference. This paper aims to investigate the reliability of passive RFID sensor systems with a reference tag for crack detection of aluminum alloy structures when the condition of reading distance and surrounding environment changes. The impedance and gain of tags are simulated, which provides theoretical basis for experimental analysis. With an increase of crack depth, the impedance of the sensor tag shifts to the low frequency direction, and the reference tag changes slightly. When dual tags are placed orthogonally, the gain of the sensor tag changes greatly, which means that it is more sensitive to crack depth. The backscatter power of the sensor tag shows a decline trend, and the power of the reference tag remains unchanged. The sensor features a linear response with the variation of crack depth. The sensitivity of crack characterization is better when dual tags are placed orthogonally.

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Investigation on Velocity Effect in Pulsed Eddy Current Technique for Detection Cracks in Ferromagnetic Material

Cited by 20 publications

References 23 publications

Investigation of rolling contact fatigue cracks using the transmitter-receiver eddy current testing under moving conditions

Investigation of rolling contact fatigue cracks using the transmitter-receiver eddy current testing under moving conditions

Space–Time Pulsed Eddy Current Array for NDT of Wellbore Casings Based on MIMO Technique

Passive Ultra High Frequency RFID sensor with reference tag for crack detection of aluminum alloy structure

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