Rotating alternating current field measurement testing system with TMR arrays for arbitrary-angle crack on nonferromagnetic pipes

Zhao, Jianming; Li, Wei; Yuan, Xin’an; Yin, Xiaokang; Ding, Jianxi; Chen, Qinyu; Yang, Huimin

doi:10.1088/1361-6501/ac924a

Cited by 3 publications

(2 citation statements)

References 35 publications

(34 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless, the coupling agent is indispensable in the ultrasonic testing (UT) method [ 8 ]. Eddy current testing (ECT) [ 9 ] and alternating current field measurement (ACFM) [ 10 ] are also applied to assess the defects in metal pipes. However, with respect to ferromagnetic pipes, the signals of deep defects are a weakness of the two technologies, due to skin effects [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Residual Magnetic Field Testing System with Tunneling Magneto-Resistive Arrays for Crack Inspection in Ferromagnetic Pipes

Zhao,

Gao,

Chen

et al. 2024

Sensors

View full text Add to dashboard Cite

Ferromagnetic pipes are widely used in the oil and gas industry. They are subject to cracks due to corrosion, pressure, and fatigue. It is significant to detect cracks for the safety of pipes. A residual magnetic field testing (RMFT) system is developed for crack detection in ferromagnetic pipes. Based on this background, a detection probe based on an array of tunneling magneto-resistive (TMR) sensors and permanent magnets is exploited. The probe is able to partially magnetize the pipe wall and collect magnetic signals simultaneously. First, a theoretical analysis of RMFT is presented. The physics principle of RMFT is introduced, and a finite element model is built. In the finite element simulations, the effects of the crack length and depth on the RMFT signal are analyzed, and the signal characteristics are selected to represent the crack size. Next, the validated experiments are conducted to demonstrate the feasibility of the proposed RMFT method in this paper.

show abstract

Section: Introductionmentioning

confidence: 99%

Residual Magnetic Field Testing System with Tunneling Magneto-Resistive Arrays for Crack Inspection in Ferromagnetic Pipes

Zhao,

Gao,

Chen

et al. 2024

Sensors

View full text Add to dashboard Cite

show abstract

“…High sensitivity sensors are widely used in NDT [16], which can be used to detect weak magnetic fields. Cheng [17] used highly sensitive magneto-impedance sensors to detect the back-side wall thinning under low-strength magnetization.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of iron-cored coil sensor in magnetic flux leakage detection of thick-walled steel pipe

Wang¹,

Yu²,

Tang³

et al. 2023

Meas. Sci. Technol.

View full text Add to dashboard Cite

Thick-walled steel pipes, which bear high internal pressure, are widely applied in nuclear power and pressure pipelines. If there are defects in the inner wall, they are easy to expand and cause accidents. Therefore, the thick-walled steel pipe must be subject to non destructive-testing after production. For the magnetic flux leakage (MFL) testing method, the detection sensitivity gradually decreases with the increase of wall thickness. To solve this problem, a new structure of MFL probe is proposed in this paper. The influence of the iron core permeability on the MFL signal is analyzed theoretically, and the effect of the core length and diameter on the MFL signal is analyzed by simulation. The variation of the MFL signal with the change of the iron core and coil lift-off is studied respectively. The simulation results are verified by experiments. It is found that the lift-off of the iron-cored coil is determined by the iron core position. Based on this phenomenon, an MFL array probe is designed, which can be used for online detection of thick-walled steel pipes to improve the detection sensitivity of inner wall defects.

show abstract

Design of Dual-Frequency Alternating Current Field Measurement Instrument Based on FPGA

Ding,

Yuan,

et al. 2023

2023 IEEE 11th International Conference on Information, Communication and Networks (ICICN)

View full text Add to dashboard Cite

Rotating alternating current field measurement testing system with TMR arrays for arbitrary-angle crack on nonferromagnetic pipes

Cited by 3 publications

References 35 publications

Residual Magnetic Field Testing System with Tunneling Magneto-Resistive Arrays for Crack Inspection in Ferromagnetic Pipes

Residual Magnetic Field Testing System with Tunneling Magneto-Resistive Arrays for Crack Inspection in Ferromagnetic Pipes

Optimal design of iron-cored coil sensor in magnetic flux leakage detection of thick-walled steel pipe

Design of Dual-Frequency Alternating Current Field Measurement Instrument Based on FPGA

Contact Info

Product

Resources

About