Non-contact harmonic magnetic field detection for parallel steel pipeline localization and defects recognition

Zhao, Yizhen; Wang, Xinhua; Sun, Tao; Chen, Ying‐Chun; Yang, Lin; Zhang, Tao; Ju, Haiyang

doi:10.1016/j.measurement.2021.109534

Cited by 20 publications

(4 citation statements)

References 31 publications

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“…Damadian et al [46] visualized tumours in living animals through field-focusing nuclear magnetic resonance (FONAR). In recent years, magnetic focusing was widely used in transcranial magnetic stimulation [47] (TMS), magnetic resonance imaging [48], magnetic drug targeting [49][50][51] (MDT), underground pipeline localization [52], metal soldering [53], metal surface detection [54] and quantum science [55].…”

Section: Of 29mentioning

confidence: 99%

Modelling, Linearity Analysis and Optimization of an Inductive Angular Displacement Sensor Based on Magnetic Focusing in Ships

Wang

et al. 2023

JMSE

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A sensor for measuring the crankshaft angle of the main engine in ships is designed. Compared with the existing crankshaft angle encoder, this design’s advantage is that there is no need to add a gear system at the free end of the crankshaft, reducing machining complexity. The purpose of providing high angle resolution over a wide speed range is achieved. Inductive angular displacement sensors (IADSs) require an eddy current magnetic field as a medium to generate the induced voltage. The induced voltage also requires a complex linearization calculation to obtain a linear relationship between angle and voltage. Therefore, a model of the inductive angular displacement sensor based on magnetic focusing (IADSMF) is proposed. Magnetic focusing is introduced into the IADS to replace the eddy current magnetic field with a focusing magnetic field. The main disadvantage of traditional IADSs, which is that they cannot reduce the eddy current magnetic field, is mitigated. An approximate square−shaped focusing magnetic field (12.4 × 12.4 mm2) is formed using the magnetic field constraint of the magnetic conductor. When the receiving coil undergoes a position change relative to the square−shaped focusing magnetic field, the voltage generated via the receiving coil is measured using the electromagnetic induction principle to achieve angular displacement measurement. A mathematical model of the IADSMF is derived. Induced voltages at different frequencies and rotational speeds are simulated and analyzed via MATLAB. The results show that frequency is the main factor affecting the induced voltage amplitude. The sensitivity of the IADSMF is 0.2023 mV/°. The resolution and measurement of the IADSMF range from 0.06° and 0–360°. Compared with a conventional planar coil−based IADS, the eddy current loss is reduced from 2.1304 to 0.3625 W. Direct linearization of the angular displacement with the induced voltage is achieved through designing a square−shaped focusing field and receiving coil. After optimizing the sensor structure with the optimization algorithm, the linearity error is 0.6012%. Finally, this sensor provides a theoretical basis and research ideas for IADS development in ships and navigation.

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Section: Of 29mentioning

confidence: 99%

Modelling, Linearity Analysis and Optimization of an Inductive Angular Displacement Sensor Based on Magnetic Focusing in Ships

Wang

et al. 2023

JMSE

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“…Yang et al [3] designed a three-phase array probe with a zero-flux position for placing TMR sensors to counteract interference from the excitation magnetic field, thereby enhancing probe lift-off distance. Zhao et al [4] have introduced an arrayfocusing detector to increase the energy density of the excitation magnetic field on the pipeline. Hu et al [5] improved the accuracy of large-area corrosion measurement by adding Mn-Zn ferrite magnetic cores to the receiving probes.…”

Section: Introductionmentioning

confidence: 99%

Design of differential probe with harmonic magnetic field and its data process method

Yang,

Wang,

Sun

et al. 2024

J. Phys.: Conf. Ser.

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To identify the condition of steel pipelines beyond the line of sight during operation, this study presents a design methodology for a differential probe, along with a harmonic magnetic field excitation technique and its corresponding data processing methodology. The coaxial arrangement of the excitation coils in a planar configuration generates a potent induced magnetic field, ensuring a sufficient standoff distance. Under the influence of harmonic excitation, the magnetic permeability of the pipeline surface decreases, resulting in an increased detection depth. Periodic alterations in the magnetic permeability of the pipeline surface enhance the amplitude of defects. Adjusting the position of the induction coil minimizes interference from the excitation magnetic field, thereby obtaining a pure induced magnetic field. Differential processing is applied to the two induction coils to counteract interference from the background magnetic field. Finally, the effectiveness and reliability of this probe are validated through three experiments: pipeline positioning, weld seam inspection, and damage detection.

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“…By digging a vertical shaft with a depth of two meters, the magnetic gradient transformation generated by pipeline currents could be analyzed, and a formula for estimating a pipeline's buried depth and horizontal position was obtained [16]. Yizhen Zhao et al proposed a target signal extraction algorithm to ascertain the locations of parallel steel pipelines and recognize defects based on TMR sensors, which is of great significance for the application of non-destructive testing (NDT) in pipeline in-line inspection [17]. The uncertainties in pipeline inspections and estimations of the size and probability of corrosion defects should be considered for the management of the health of pipelines.…”

Section: Introductionmentioning

confidence: 99%

TMR-Array-Based Pipeline Location Method and Its Realization

Huang

Zhao

et al. 2023

Sustainability

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Pipeline inspection is important to ensure the safe operation of pipelines. Obtaining the location of an underground pipeline is a prerequisite for most inspection technologies. Existing pipeline location methods can find a pipeline’s location, but they require multiple measurements and cannot be used by automatic inspection robots. In this paper, a tunnel magnetoresistance (TMR)-sensor-array-based pipeline location method is proposed to solve this problem. Firstly, a detection probe is designed using a TMR sensor array. It is calibrated by the improved ellipsoid fitting method to measure the magnetic field around the pipeline accurately. Secondly, a relative pipeline-position-locating method is proposed by detecting the phases of the magnetic induction signals at different frequencies. Thirdly, a three-dimensional pipeline location method is proposed. The horizontal and vertical distances and the angle between the pipeline and the probe are calculated by measuring the magnetic induction amplitude. Finally, a simulation model and a test platform are established, and the experimental results illustrate that, by adopting the TMR array, the three-dimensional pipeline location method can locate a pipeline in real time in three dimensions with good accuracy.

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Non-contact harmonic magnetic field detection for parallel steel pipeline localization and defects recognition

Cited by 20 publications

References 31 publications

Modelling, Linearity Analysis and Optimization of an Inductive Angular Displacement Sensor Based on Magnetic Focusing in Ships

Modelling, Linearity Analysis and Optimization of an Inductive Angular Displacement Sensor Based on Magnetic Focusing in Ships

Design of differential probe with harmonic magnetic field and its data process method

TMR-Array-Based Pipeline Location Method and Its Realization

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