Enhancement of the Excitation Efficiency of the Non-Contact Magnetostrictive Sensor for Pipe Inspection by Adjusting the Alternating Magnetic Field Axial Length

Sun, Pengfei; Wu, Xiaowen; Xu, Jianyuan; Li, Jian

doi:10.3390/s140101544

Cited by 12 publications

(10 citation statements)

References 22 publications

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“…MsT applications include dispersion analysis in waveguides [29,30] and defect identification in steel pipes and tubes [31][32][33][34], steel plates with a T joint [35], and steel cables and strands [36][37][38]; a particularly interesting application is condition monitoring of an internal combustion engine [39]. Further developments of MsTs and their characterization were also reported [40][41][42][43][44][45][46][47] including measurement of bending waves or vibrations [48,49] and an attempt at MsT usage in a rotating shaft for crack detection [50]. The effectiveness of magnetostrictive transducers-especially for long-range ultrasonic inspections of steel waveguides-has been confirmed through the previously mentioned studies.…”

Section: Introductionmentioning

confidence: 96%

Review of magnetostrictive patch transducers and applications in ultrasonic nondestructive testing of waveguides

2015

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A magnetostrictive patch transducer (MPT) is a transducer that exploits the magnetostrictive phenomena representing interactions between mechanical and magnetic fields in ferromagnetic materials. Since MPT technology was mainly developed and applied for nondestructive ultrasonic testing in waveguides such as pipes and plates, this paper will accordingly review advances of this technology in such a context. An MPT consists of a magnetic circuit composed of permanent magnets and coils, and a thin magnetostrictive patch that works as a sensing and actuating element which is bonded onto or coupled with a test waveguide. The configurations of the circuit and magnetostrictive patch therefore critically affect the performance of an MPT as well as the excited and measured wave modes in a waveguide. In this paper, a variety of state-of-the-art MPT configurations and their applications will be reviewed along with the working principle of this transducer type. The use of MPTs in wave experiments involving phononic crystals and elastic metamaterials is also briefly introduced.

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Section: Introductionmentioning

confidence: 96%

Review of magnetostrictive patch transducers and applications in ultrasonic nondestructive testing of waveguides

2015

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“…To enhance the energy conversion efficiency of the transducer, the magnetic field intensity provided by the permanent magnets shall be properly designed. More theoretical information on the MS transducer design can be found in the work by Sun et al [ 44 ]…”

Section: Design Of Ms Transducermentioning

confidence: 99%

Guided wave‐based cable damage detection using wave energy transmission and reflection

Tang

Sui

Duan

et al. 2021

Struct Control Health Monit

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Summary Health monitoring of cables in civil engineering structures is a great challenge, because their integrity directly affects the safety of the whole structure. A magnetostrictive (MS) transducer‐based guided wave method for cable damage detection is presented in this study. A wave energy‐based method is proposed for damage localization and severity assessment. The wave energy transmission coefficient at the damage location is presented as a measure for the damage condition. Firstly, the wave dispersion properties were analyzed on a steel strand with seven helical wires using a semi‐analytical finite element (SAFE) method. Then, the selection of exciting frequency and design of the MS transducer were carried out based on the SAFE analysis results. Numerical and experimental studies were performed on multiple cases of wire breakage and corrosion using the pitch‐catch method. Time‐of‐flight information on the wave packets reflected from the damages was used for damage localizations, while wavelet coefficients were used to accurately analyze wave energy transmission and reflection. It has been found that the damage locations and damage conditions can be determined accurately using the proposed method.

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“…In fact, magnetic sensing technology is applied to not only the detection of the underwater cables, but also bridge cables, steel cables, underground pipelines, etc. [ 5 , 6 , 7 , 8 ]. There are two types of methods adopted in practical applications of magnetic detection.…”

Section: Introductionmentioning

confidence: 99%

Subsea Cable Tracking by Autonomous Underwater Vehicle with Magnetic Sensing Guidance

Xia

Niu

et al. 2016

Sensors

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The changes of the seabed environment caused by a natural disaster or human activities dramatically affect the life span of the subsea buried cable. It is essential to track the cable route in order to inspect the condition of the buried cable and protect its surviving seabed environment. The magnetic sensor is instrumental in guiding the remotely-operated vehicle (ROV) to track and inspect the buried cable underseas. In this paper, a novel framework integrating the underwater cable localization method with the magnetic guidance and control algorithm is proposed, in order to enable the automatic cable tracking by a three-degrees-of-freedom (3-DOF) under-actuated autonomous underwater vehicle (AUV) without human beings in the loop. The work relies on the passive magnetic sensing method to localize the subsea cable by using two tri-axial magnetometers, and a new analytic formulation is presented to compute the heading deviation, horizontal offset and buried depth of the cable. With the magnetic localization, the cable tracking and inspection mission is elaborately constructed as a straight-line path following control problem in the horizontal plane. A dedicated magnetic line-of-sight (LOS) guidance is built based on the relative geometric relationship between the vehicle and the cable, and the feedback linearizing technique is adopted to design a simplified cable tracking controller considering the side-slip effects, such that the under-actuated vehicle is able to move towards the subsea cable and then inspect its buried environment, which further guides the environmental protection of the cable by setting prohibited fishing/anchoring zones and increasing the buried depth. Finally, numerical simulation results show the effectiveness of the proposed magnetic guidance and control algorithm on the envisioned subsea cable tracking and the potential protection of the seabed environment along the cable route.

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Enhancement of the Excitation Efficiency of the Non-Contact Magnetostrictive Sensor for Pipe Inspection by Adjusting the Alternating Magnetic Field Axial Length

Cited by 12 publications

References 22 publications

Review of magnetostrictive patch transducers and applications in ultrasonic nondestructive testing of waveguides

Review of magnetostrictive patch transducers and applications in ultrasonic nondestructive testing of waveguides

Guided wave‐based cable damage detection using wave energy transmission and reflection

Subsea Cable Tracking by Autonomous Underwater Vehicle with Magnetic Sensing Guidance

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