{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,14]],"date-time":"2026-03-14T18:30:31Z","timestamp":1773513031845,"version":"3.50.1"},"reference-count":50,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2017,12,15]],"date-time":"2017-12-15T00:00:00Z","timestamp":1513296000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51505308"],"award-info":[{"award-number":["51505308"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities","doi-asserted-by":"publisher","award":["2015SCU11059"],"award-info":[{"award-number":["2015SCU11059"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004543","name":"China Scholarship Council","doi-asserted-by":"publisher","award":["201606245039"],"award-info":[{"award-number":["201606245039"]}],"id":[{"id":"10.13039\/501100004543","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Technology support program of Sichuan Province","award":["2016GZ0013"],"award-info":[{"award-number":["2016GZ0013"]}]},{"name":"Technology support program of Sichuan Province","award":["2016GZ0187"],"award-info":[{"award-number":["2016GZ0187"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In order to improve the sensitivity of online magnetic flux leakage (MFL) testing for steel pipe, a sensing method based on the magnetic guiding effect is proposed and investigated in this paper. Compared to the conventional contact sensing method using a non-ferromagnetic support, the proposed method creatively utilizes a ferromagnetic one to guide more magnetic flux to leak out. Based on Hopkinson\u2019s law, the principle of the magnetic guiding effect of the ferromagnetic support is theoretically illustrated. Then, numerical simulations are conducted to investigate the MFL changes influenced by the ferromagnetic support. Finally, the probe based on the proposed method is designed and developed, and online MFL experiments are performed to validate the feasibility of the proposed method. Online tests show that the proposed sensing method can greatly improve the MFL sensitivity.<\/jats:p>","DOI":"10.3390\/s17122911","type":"journal-article","created":{"date-parts":[[2017,12,15]],"date-time":"2017-12-15T12:23:56Z","timestamp":1513340636000},"page":"2911","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["An Online MFL Sensing Method for Steel Pipe Based on the Magnetic Guiding Effect"],"prefix":"10.3390","volume":"17","author":[{"given":"Jianbo","family":"Wu","sequence":"first","affiliation":[{"name":"School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China"}]},{"given":"Hui","family":"Fang","sequence":"additional","affiliation":[{"name":"School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China"}]},{"given":"Xiaoming","family":"Huang","sequence":"additional","affiliation":[{"name":"School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China"}]},{"given":"Hui","family":"Xia","sequence":"additional","affiliation":[{"name":"School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China"}]},{"given":"Yihua","family":"Kang","sequence":"additional","affiliation":[{"name":"School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China"}]},{"given":"Chaoqing","family":"Tang","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK"}]}],"member":"1968","published-online":{"date-parts":[[2017,12,15]]},"reference":[{"key":"ref_1","unstructured":"American Petroleum Institute (API) (2002). 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