Results 61 to 70 of about 392 (157)

Research on Defect Detection by Finite Element Simulation Combined with Magnetic Imaging

Metals
This study investigates the magneto-optical imaging (MOI) characteristics of weld defects under alternating magnetic field excitation. A magneto-optical sensor is employed to detect different types of weld defects, and the correlation between MOI ...
Chunmei Xu, Hongliang Gao, Yanxi Zhang, Zhengfeng Wang, Yongbiao Luo, Jian Wang, Md Rakibul Hasan, Tanmoy Mondal, Yanfeng Li   +8 more
doaj   +1 more source

Application of Variational Mode Decomposition and k-Nearest Neighbor Algorithm in the Quantitative Nondestructive Testing of Wire Ropes

Shock and Vibration, 2019
In this paper, we present a nondestructive testing device for wire rope by unsaturated magnetic excitation as an alternative to existing magnetic flux leakage (MFL) detection devices.
Pengbo Zheng, Juwei Zhang
doaj   +1 more source

Quantitative Inspection of Remanence of Broken Wire Rope Based on Compressed Sensing

Sensors, 2016
Most traditional strong magnetic inspection equipment has disadvantages such as big excitation devices, high weight, low detection precision, and inconvenient operation.
Juwei Zhang, Xiaojiang Tan
doaj   +1 more source

Analytical Modeling of Demagnetization Effects on Magnetic Flux Leakage Signals in Ferromagnetic Pipelines

Magnetochemistry
Magnetic flux leakage (MFL) testing is a widely used non-destructive method for detecting defects in ferromagnetic pipelines. However, demagnetizing fields in ferromagnetic materials can distort MFL signals, reducing detection accuracy.
Jiawen Zhang, Nan Liu, Zheng Lian, Guangwen Sun, Bin Liu, Lijian Yang   +5 more
doaj   +1 more source

Non-Destructive Evaluation Technique for Continuum Structures Using Non-Contact Magnetic Flux Leakage(MFL) Measurement

Journal of the Korean Society for Nondestructive Testing, 2016
이러한 연속체 구조물의 경우 대부분 외부환경에 노출되어 있어 다양한 환경적, 물리적 요인으로 인해 부식, 크랙, 단선과 같은 국부손상이 발생하게 될 수 있는데 이러한 손상에 대한 초기 대처가 늦을 경우 특정부의 응력 집중, 유체누출 등과 같은 원인으로 구조물 전체의 대형 사고로 이어질 수 있는 위험성을 가지고 있다.따라서 이러한 위험성을 조기에 방지하기 위해 부재에 발생한 손상을 초기에 발견할 수 있는 검사법이 필수적인데, 짧게는 수십 미터에서 길게는 수천 킬로미터까지 이어지는 거대한 연속체 구조물의 특성상, 적용되는 검사법은 신뢰성과 더불어 경제성을 반드시 요구하게 된다.
openaire   +2 more sources

Research on Pipeline Magnetic Flux Leakage Testing Defect Classification Based on Generate Expansion and Dual-Channel Vision Transformer

Applied Sciences
Magnetic flux leakage (MFL) testing is a vital non-destructive testing method used to identify defects in oil and gas pipelines and critical components.
Xulai Zhu, Yuxiang Zhang, Qiansheng Fang, Jin Jiang, Nana Zhang, Shiheng Tang, Gongquan Zhang   +6 more
doaj   +1 more source

Design and Optimization of an MFL Coil Sensor Apparatus Based on Numerical Survey

Sensors, 2019
In this study, we aimed to design a coil sensor prototype capable of detecting metallic area loss based on numerical simulations using the magnetic flux leakage (MFL) method. Unlike previous numerical simulation-based studies, which are only conducted to
Ali Azad, Namgyu Kim
doaj   +1 more source

Poster Sessions

HemaSphere, Volume 9, Issue S1, June 2025.
wiley   +1 more source

EHA2024 Hybrid Congress

HemaSphere, Volume 8, Issue S1, June 2024.
wiley   +1 more source

Design and Performance Study of a Magnetic Flux Leakage Pig for Subsea Pipeline Defect Detection

Journal of Marine Science and Engineering
Subsea pipelines, operating in high-pressure and high-salinity conditions, face ongoing risks of leakage. Pipeline leaks can pollute the marine environment and, in severe cases, cause safety incidents, endangering human lives and property.
Fei Qu, Shengtao Chen, Meiyu Zhang, Kang Zhang, Yongjun Gong   +4 more
doaj   +1 more source