Research on crack monitoring technology of flexible eddy current array sensor based on TMR sensors

Fan, Xiangqian; He, Yuting; Chen, Tao; Hou, Congxun

doi:10.1016/j.measurement.2022.110926

Cited by 12 publications

(4 citation statements)

References 30 publications

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“…A specially manufactured holder with an asymmetry setting mechanism was created, as shown in Figure 9, in order to set the value in equation 1 of the examined GMR-based EC probe. In addition to the GMR sensor used by the researcher, Tunnel MagnetoResistance (TMR) sensors are also used to replace the original induction coils mentioned by Fan et al, 2022 [35]. In order to evaluate the influence of altered magnetic induction intensity at the test site, a current dipole model is first suggested, followed by a method for quantitatively monitoring subsurface cracks.…”

Section: Design Of Gmr Sensor Probementioning

confidence: 99%

Eddy Current Testing Methods and Design for Pipeline Inspection System: A Review

Mohamad

Ali

Rifai

et al. 2023

J. Phys.: Conf. Ser.

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Non-destructive testing and complex systems integration are commonly used in transportation, aircraft, automotive, manufacturing, petrochemical, and defence. Eddy current testing (ECT) is a common non-destructive evaluation technique, especially in the coating, nuclear, and oil and gas industries. However, the eddy current testing method must continue to focus on the probe’s construction and application. It ascribed noisy data to inadequate detection and a severe false alarm problem. Nonetheless, only few academics have elaborated on the intelligent ECT crack detection method. This study provides an overview of the eddy current testing technique and the probe structure design elements that influence fracture detection accuracy. The first section describes the Eddy current testing by encircling coil system for a differential probe (ECDP) and an encircling coil for an absolute probe design (ECDP). The explanations focus mostly on the probe’s creation and detection in Rotating electromagnetic field eddy current (RoFEC). The advantages and disadvantages of eddy current testing surrounding probes are analysed. In addition, a summary of prior studies investigating testing samples of ferromagnetic pipe, steel rod, and wire rope is presented. The second segment focuses on Eddy current testing employing a Giant Magnetoresistance (GMR) sensor system, with a particular emphasis on sensor arrays, GMR, and conventional eddy current coils for crack identification. Finally, a comprehensive overview of eddy current testing methods and design for non-destructive pipeline inspection systems is presented.

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Section: Design Of Gmr Sensor Probementioning

confidence: 99%

Eddy Current Testing Methods and Design for Pipeline Inspection System: A Review

Mohamad

Ali

Rifai

et al. 2023

J. Phys.: Conf. Ser.

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“…Considering the requirement of a high inspection efficiency of the CUI of pipelines, the most straightforward approach is to increase the coverage area by using multiple excitors and multiple receiver array. The advances in the eddy current array coil design [23,24] have improved the inspection speed and promoted accurate depth sizing of cracks, offering additional benefits, such as state-of-the-art imaging, improved surface coverage, and ease of data archiving. For various pipeline-inspection approaches, the use of multiple excitations and receiving sensor arrays has been demonstrated to be effective for improving both the inspection efficiency and resolution [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Circular-arc array for the pulsed eddy current inspection of thermally insulated pipelines

Yang,

Dang,

Yang

et al. 2023

Meas. Sci. Technol.

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The inspection of corrosion under insulation (CUI) has been identified as a significant challenge in the petroleum and chemical process industries. As some of the most effective strategies, pulsed eddy current (PEC) techniques have proved effective for the measurement of the CUI of pipelines. In this paper, we propose a circular-arc array (CAA) to improve the measurement efficiency for the PEC inspection of thermally insulated pipelines. Based on the PEC system model for inspecting the CUI of pipelines, the magnetic field distribution of the CAA with multiple excitors was investigated. It is shown that the coverage of induced magnetic field gets much larger than that of the single excitor to realize high-efficiency measurements. Moreover, a sparsely distributed receiver array is designed to further improve the signal-to-noise ratio by eliminating the waviness effect due to multiple excitors. Finally, experiments were conducted, and the results demonstrated the effectiveness of the proposed method for the inspection of thermally insulated pipelines.

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“…Eddy current sensors can be used for non-destructive testing [4][5][6] and fatigue crack monitoring [7][8][9][10]. Eddy current sensors can be divided into single-frequency exciting sensor [8,10], multi-frequency exciting sensor [1,11] and pulse exciting sensor [12][13][14][15] according to the exciting method. The more frequent it is, the more defect information it can obtain.…”

Section: Introductionmentioning

confidence: 99%

Research on fatigue crack quantitative monitoring based on eddy current sensor with an interactive induction coil layout

Fan¹,

He²,

Chen³

2023

Smart Mater. Struct.

Self Cite

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To reduce the number of sensor channels, this paper proposes an eddy current sensor with an interactive induction coil layout. First, the crack monitoring principle of the sensor is analyzed, and fatigue crack monitoring experiment is carried out. It is found that the cracks can be quantified according to the characteristic points of the sensitivity variation curve. Then, a permalloy plate is used for reinforcing the sensor, and the crack monitoring accuracy test is carried out, which shows that the crack monitoring accuracy error of the sensor is no more than 0.1mm. Finally, the sensor network is built by the sensor according to the dangerous parts of the butt joint structure determined by the finite element analysis. And fatigue crack monitoring experiment is carried out, which shows that the sensor network can determine the position and length of the fatigue crack, and the error is no more than 0.1mm.

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Research on crack monitoring technology of flexible eddy current array sensor based on TMR sensors

Cited by 12 publications

References 30 publications

Eddy Current Testing Methods and Design for Pipeline Inspection System: A Review

Eddy Current Testing Methods and Design for Pipeline Inspection System: A Review

Circular-arc array for the pulsed eddy current inspection of thermally insulated pipelines

Research on fatigue crack quantitative monitoring based on eddy current sensor with an interactive induction coil layout

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