Cross-Sectional Loss Quantification for Main Cable NDE Based on the B-H Loop Measurement Using a Total Flux Sensor

Journal of Sensors - Tập 2019 - Trang 1-10 - 2019
Ju‐Won Kim1, Junkyeong Kim2, Seunghee Park1
1School of Civil, Architectural Engineering and Landscape Architecture, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Republic of Korea
2Research Strategy Team, Advanced Institute of Convergence Technology, Gyeonggi-do 16229, Republic of Korea

Tóm tắt

In the real world, the main cables of suspension bridges are commonly inspected by conducting a periodic visual inspection of the exterior cover of the cable. Although there is a need to conduct a nondestructive evaluation (NDE) of the damage of the main cable, a suitable NDE technique has not yet been developed due to the large diameter and low accessibility of the cable. This study investigates a magnetic sensing cross-sectional loss quantification method that can detect internal and external damage to the main cables. This main cable NDE method applies an extremely low-frequency alternating current (ELF-AC) magnetization method and search coil sensor-based total flux measurement. A total flux sensor head consists of a magnetization yoke and a search coil sensor. To magnetize the main cable, a magnetic field was generated by applying a triangular ELF-AC voltage to the electromagnet yoke. The sensing part measures the magnetic flux that passes through the search coil, and the B-H loop was then obtained using the relationship between the ELF-AC voltage that has been input and the total flux that was measured. Also, the cross-sectional loss can be quantified using a variation of magnetic features from the B-H loop. To verify the feasibility of using the proposed NDE technique, a series of experiments were performed using a main cable specimen with a gradual increase in the cross-sectional loss. Finally, the relationship between the cross-sectional loss and extracted magnetic feature was determined and used to quantify the cross-sectional loss via the proposed method.

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Tài liệu tham khảo

1997, Materials Performance, 36, 75

10.1784/insi.47.5.269.65050

10.1109/5.56910

10.1109/JSEN.2006.874493

10.1088/0022-3727/31/22/006

2006

2005

1985, Materials Evaluation, 43, 1592

1987, Oil and Gas Journal, 87

10.1016/S0924-4247(01)00511-8

10.3390/s18010109

10.1016/0963-8695(91)90038-5

10.1155/2014/929341

10.1177/1045389X17721038

10.1103/RevModPhys.21.541

2011

2013, Faraday’s law, alternating current, and Maxwell’s equations

1997

10.2749/222137814814069651

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Journal of Sensors

Tập 2019

1-10

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